Computational study of hybrid water-in-salt electrolytes at the electrochemical interface (Specialization in Condensed Matter Physics)
Authorship
D.A.F.
Master in Physics
D.A.F.
Master in Physics
Defense date
07.17.2025 10:30
07.17.2025 10:30
Summary
In the present Master's Thesis, molecular dynamics simulations of hybrid water-in-salt (WiS) electrolytes will be carried out, obtained through the incorporation of different concentrations of an organic co-solvent (acetonitrile). The studied systems: LiTFSI+H2O at 21 m; NaTFSI+H2O at 8 m; and NaOTF+H2O at 9 m, correspond to their respective solubility limits in water, and exhibit strong potential for electrochemical applications. In particular, the effect of replacing the lithium cation with sodium and the TFSI anion with OTF, as well as the impact of co-solvent addition, will be analyzed in terms of the structuring and organization of the electrode-electrolyte interface. Specifically, capacitance values, density profiles, and the orientations of the various species present in the system will be investigated.
In the present Master's Thesis, molecular dynamics simulations of hybrid water-in-salt (WiS) electrolytes will be carried out, obtained through the incorporation of different concentrations of an organic co-solvent (acetonitrile). The studied systems: LiTFSI+H2O at 21 m; NaTFSI+H2O at 8 m; and NaOTF+H2O at 9 m, correspond to their respective solubility limits in water, and exhibit strong potential for electrochemical applications. In particular, the effect of replacing the lithium cation with sodium and the TFSI anion with OTF, as well as the impact of co-solvent addition, will be analyzed in terms of the structuring and organization of the electrode-electrolyte interface. Specifically, capacitance values, density profiles, and the orientations of the various species present in the system will be investigated.
Direction
MENDEZ MORALES, TRINIDAD (Tutorships)
LOMBA GARCÍA, ENRIQUE (Co-tutorships)
MENDEZ MORALES, TRINIDAD (Tutorships)
LOMBA GARCÍA, ENRIQUE (Co-tutorships)
Court
FERNANDEZ PEREZ, JOSEFA (Chairman)
PARDO CASTRO, VICTOR (Secretary)
CASTRO PAREDES, FRANCISCO JAVIER (Member)
FERNANDEZ PEREZ, JOSEFA (Chairman)
PARDO CASTRO, VICTOR (Secretary)
CASTRO PAREDES, FRANCISCO JAVIER (Member)
Analysis and characterization of wind resources in different regions based on ERA5 data and CMIP6 models
Authorship
K.M.B.J.
Master in Renewable Energies, Climate Change and Sustainable Development
K.M.B.J.
Master in Renewable Energies, Climate Change and Sustainable Development
Defense date
07.16.2025 09:30
07.16.2025 09:30
Summary
This study analyzes wind resource development in different regions to assess their changing outlook and energy implications. Wind speed data from two sources were downloaded. On the one hand, ERA5 data from recent decades (1985-2024) were used, which combine global meteorological observations with model-based information. On the other hand, results from two CMIP6 climate models (CESM2 and EC-Earth3-Veg-LR) were used, simulating both historical data (1985-2014) and future predictions (2070-2099), considering slight (SSP1-2.6) and extreme (SSP5-8.5) climate change scenarios. Several parameters were then calculated, such as average speeds and relative frequencies for different speed ranges. Furthermore, using the power curves of two wind turbines with standard characteristics, the annual energy that could be generated both onshore and offshore was obtained. Finally, wind speed and energy production were represented on various maps at three different geographic scales: global, national, and regional. The results of CESM2 indicate that wind resource will increase in both Spain and Galicia, with this variation being more significant in a slight climate change scenario. The EC-Earth3-Veg-LR results show similar trends, although with much more moderate variations, even negative in some cases.
This study analyzes wind resource development in different regions to assess their changing outlook and energy implications. Wind speed data from two sources were downloaded. On the one hand, ERA5 data from recent decades (1985-2024) were used, which combine global meteorological observations with model-based information. On the other hand, results from two CMIP6 climate models (CESM2 and EC-Earth3-Veg-LR) were used, simulating both historical data (1985-2014) and future predictions (2070-2099), considering slight (SSP1-2.6) and extreme (SSP5-8.5) climate change scenarios. Several parameters were then calculated, such as average speeds and relative frequencies for different speed ranges. Furthermore, using the power curves of two wind turbines with standard characteristics, the annual energy that could be generated both onshore and offshore was obtained. Finally, wind speed and energy production were represented on various maps at three different geographic scales: global, national, and regional. The results of CESM2 indicate that wind resource will increase in both Spain and Galicia, with this variation being more significant in a slight climate change scenario. The EC-Earth3-Veg-LR results show similar trends, although with much more moderate variations, even negative in some cases.
Direction
MIGUEZ MACHO, GONZALO (Tutorships)
MIGUEZ MACHO, GONZALO (Tutorships)
Court
RODRÍGUEZ SOALLEIRO, ROQUE (Chairman)
GARCIA GUIMAREY, MARIA JESUS (Secretary)
SEOANE IGLESIAS, NATALIA (Member)
RODRÍGUEZ SOALLEIRO, ROQUE (Chairman)
GARCIA GUIMAREY, MARIA JESUS (Secretary)
SEOANE IGLESIAS, NATALIA (Member)
Computational study of the transport of mixtures of ionic liquids and molecular cosolvents at the electrochemical interface (Specialty in Matter Physics)
Authorship
M.A.B.F.
Master in Physics
M.A.B.F.
Master in Physics
Defense date
07.17.2025 10:30
07.17.2025 10:30
Summary
In the present master's thesis, a systematic study of the effect of chain length on mixtures of ionic liquids with alcohol-based molecular cosolvents is conducted. Specifically, the study will focus on systems consisting of liquids from the alkylammonium family in the presence of propanol. These mixtures exhibit anomalous conductivity, which will be analyzed in depth using polarizable interatomic potentials. These calculations will be performed both in the bulk phase and in the vicinity of an electrochemical interface.
In the present master's thesis, a systematic study of the effect of chain length on mixtures of ionic liquids with alcohol-based molecular cosolvents is conducted. Specifically, the study will focus on systems consisting of liquids from the alkylammonium family in the presence of propanol. These mixtures exhibit anomalous conductivity, which will be analyzed in depth using polarizable interatomic potentials. These calculations will be performed both in the bulk phase and in the vicinity of an electrochemical interface.
Direction
MENDEZ MORALES, TRINIDAD (Tutorships)
Montes Campos, Hadrián (Co-tutorships)
MENDEZ MORALES, TRINIDAD (Tutorships)
Montes Campos, Hadrián (Co-tutorships)
Court
FERNANDEZ PEREZ, JOSEFA (Chairman)
PARDO CASTRO, VICTOR (Secretary)
CASTRO PAREDES, FRANCISCO JAVIER (Member)
FERNANDEZ PEREZ, JOSEFA (Chairman)
PARDO CASTRO, VICTOR (Secretary)
CASTRO PAREDES, FRANCISCO JAVIER (Member)
Sexaquark production analysis with the LHCb experiments (Nuclear and Particle Physics)
Authorship
B.F.R.
Master in Physics
B.F.R.
Master in Physics
Defense date
07.16.2025 09:00
07.16.2025 09:00
Summary
Sexaquarks (uuddss) are hypothetical bound states of six quarks. Their stability and low interaction rate make them a promising candidate for dark matter (DM). The LHCb detector at CERN provides a potential avenue for their discovery, as large quantities of heavy baryons are produced there, which could decay into sexaquarks. Furthermore, the current data-taking period at the LHC (Run 3) represents a major opportunity for discovering such decays due to improvements in the trigger system. The aim of this work is to identify the most feasible decays for sexaquark production at LHCb in order to develop trigger lines for collecting data on these decays during Run 3 of the LHC.
Sexaquarks (uuddss) are hypothetical bound states of six quarks. Their stability and low interaction rate make them a promising candidate for dark matter (DM). The LHCb detector at CERN provides a potential avenue for their discovery, as large quantities of heavy baryons are produced there, which could decay into sexaquarks. Furthermore, the current data-taking period at the LHC (Run 3) represents a major opportunity for discovering such decays due to improvements in the trigger system. The aim of this work is to identify the most feasible decays for sexaquark production at LHCb in order to develop trigger lines for collecting data on these decays during Run 3 of the LHC.
Direction
VIEITES DIAZ, MARIA (Tutorships)
CID VIDAL, XABIER (Co-tutorships)
VIEITES DIAZ, MARIA (Tutorships)
CID VIDAL, XABIER (Co-tutorships)
Court
SABORIDO SILVA, JUAN JOSE (Chairman)
ALEJO ALONSO, AARON JOSE (Secretary)
CAAMAÑO FRESCO, MANUEL (Member)
SABORIDO SILVA, JUAN JOSE (Chairman)
ALEJO ALONSO, AARON JOSE (Secretary)
CAAMAÑO FRESCO, MANUEL (Member)
Study of the feasibility of implementing sustainable tourism on the island of San Andrés (Colombia)
Authorship
V.H.G.
Master in Renewable Energies, Climate Change and Sustainable Development
V.H.G.
Master in Renewable Energies, Climate Change and Sustainable Development
Defense date
07.16.2025 09:30
07.16.2025 09:30
Summary
The island of San Andres faces multiple challenges derived from traditional tourism, such as mitigating environmental deterioration, pressure on natural resources, social inequality and economic dependence on the tourism sector. This study evaluates the feasibility of implementing a sustainable tourism model that integrates economic development with environmental preservation and community well-being. This study has a qualitative methodology that combines literature review, database analysis and stakeholder surveys. The main environmental, social, economic and energy needs of the island were identified, the impact of conventional tourism was analyzed and existing sustainable initiatives were documented. The survey results show a critical perception of the environmental state of the island, concern about climate change, and a willingness on the part of local stakeholders to collaborate in tourism transformation processes. This study proposes strategies focused on energy transition, integrated waste management, regulation of tourist load and strengthening community and cultural participation.
The island of San Andres faces multiple challenges derived from traditional tourism, such as mitigating environmental deterioration, pressure on natural resources, social inequality and economic dependence on the tourism sector. This study evaluates the feasibility of implementing a sustainable tourism model that integrates economic development with environmental preservation and community well-being. This study has a qualitative methodology that combines literature review, database analysis and stakeholder surveys. The main environmental, social, economic and energy needs of the island were identified, the impact of conventional tourism was analyzed and existing sustainable initiatives were documented. The survey results show a critical perception of the environmental state of the island, concern about climate change, and a willingness on the part of local stakeholders to collaborate in tourism transformation processes. This study proposes strategies focused on energy transition, integrated waste management, regulation of tourist load and strengthening community and cultural participation.
Direction
RODRIGUEZ AÑON, JOSE ANTONIO (Tutorships)
RODRIGUEZ AÑON, JOSE ANTONIO (Tutorships)
Court
RODRÍGUEZ SOALLEIRO, ROQUE (Chairman)
GARCIA GUIMAREY, MARIA JESUS (Secretary)
SEOANE IGLESIAS, NATALIA (Member)
RODRÍGUEZ SOALLEIRO, ROQUE (Chairman)
GARCIA GUIMAREY, MARIA JESUS (Secretary)
SEOANE IGLESIAS, NATALIA (Member)
Design of a light-emitting system using Zemax optical design software (Specialization in Physics of light and radiation).
Authorship
D.L.F.
Master in Physics
D.L.F.
Master in Physics
Defense date
07.16.2025 10:00
07.16.2025 10:00
Summary
The goal of the Master's thesis is to design a light-emitting system based on LED or a fiber laser's beam to power remotely photovoltaic cells, at a distance of between several meters and tens of kilometers, using the optical simulator ANSYS Zemax OpticStudio.
The goal of the Master's thesis is to design a light-emitting system based on LED or a fiber laser's beam to power remotely photovoltaic cells, at a distance of between several meters and tens of kilometers, using the optical simulator ANSYS Zemax OpticStudio.
Direction
GARCIA LOUREIRO, ANTONIO JESUS (Tutorships)
Gómez Varela, Ana Isabel (Co-tutorships)
GARCIA LOUREIRO, ANTONIO JESUS (Tutorships)
Gómez Varela, Ana Isabel (Co-tutorships)
Court
DE LA FUENTE CARBALLO, RAUL (Chairman)
MOURIZ CEREIJO, MARIA DOLORES (Secretary)
LOPEZ LAGO, MARIA ELENA (Member)
DE LA FUENTE CARBALLO, RAUL (Chairman)
MOURIZ CEREIJO, MARIA DOLORES (Secretary)
LOPEZ LAGO, MARIA ELENA (Member)
Micromagnetic study of (nano)superellipsoids and applicability of the macrospin model (Specialty in Physics of Matter.)
Authorship
I.L.V.
Master in Physics
I.L.V.
Master in Physics
Defense date
07.17.2025 10:30
07.17.2025 10:30
Summary
This work presents a theoretical study of the magnetic behavior of Fe3O4 magnetic nanoparticles with a superellipsoidal shape, a family of geometries that allows continuous interpolation between spheres and cubes. Using micromagnetic simulations, we analyze both the magnetic order in the absence of an external field and the response of the nanoparticles to the application of a magnetic field, with the aim of evaluating the validity of the macrospin model to describe them. Following a detailed description of the physical and computational model employed, the study begins with the determination of the range of coherent behavior of the nanoparticles as a function of their size and shape. After identifying this range, the correspondence between the micromagnetic simulations and the macrospin model described as a combination of anisotropies is analyzed through a comparative study of the corresponding hysteresis loops. The results show the capability of this simplified model to describe the behavior of geometrically close shapes regardless of their elongation. The study concludes with an introduction to dynamic simulations at finite temperature and a qualitative analysis of the internal structure of the nanoparticles, specifically focusing on vortex-like configurations.
This work presents a theoretical study of the magnetic behavior of Fe3O4 magnetic nanoparticles with a superellipsoidal shape, a family of geometries that allows continuous interpolation between spheres and cubes. Using micromagnetic simulations, we analyze both the magnetic order in the absence of an external field and the response of the nanoparticles to the application of a magnetic field, with the aim of evaluating the validity of the macrospin model to describe them. Following a detailed description of the physical and computational model employed, the study begins with the determination of the range of coherent behavior of the nanoparticles as a function of their size and shape. After identifying this range, the correspondence between the micromagnetic simulations and the macrospin model described as a combination of anisotropies is analyzed through a comparative study of the corresponding hysteresis loops. The results show the capability of this simplified model to describe the behavior of geometrically close shapes regardless of their elongation. The study concludes with an introduction to dynamic simulations at finite temperature and a qualitative analysis of the internal structure of the nanoparticles, specifically focusing on vortex-like configurations.
Direction
SERANTES ABALO, DAVID (Tutorships)
Iglesias Clotas, Oscar (Co-tutorships)
SERANTES ABALO, DAVID (Tutorships)
Iglesias Clotas, Oscar (Co-tutorships)
Court
FERNANDEZ PEREZ, JOSEFA (Chairman)
PARDO CASTRO, VICTOR (Secretary)
CASTRO PAREDES, FRANCISCO JAVIER (Member)
FERNANDEZ PEREZ, JOSEFA (Chairman)
PARDO CASTRO, VICTOR (Secretary)
CASTRO PAREDES, FRANCISCO JAVIER (Member)
Key Strategies in Forest Management to Improve the Fight Against Climate Change and Wildfires in Galicia. A prevention-based approach
Authorship
A.M.F.
Master in Renewable Energies, Climate Change and Sustainable Development
A.M.F.
Master in Renewable Energies, Climate Change and Sustainable Development
Defense date
07.16.2025 09:30
07.16.2025 09:30
Summary
This project addresses forest management, climate change, and wildfires in Galicia from the perspective of local forest communities in common ownership. This proposal stems from the need to delve deeper into the role that local forest management can play in the face of growing environmental challenges, in a context where land abandonment and the lack of seasonal continuity in rural areas contribute to increased fire risk and ecosystem deterioration. Through a methodological combination based on a literature review, expert interviews, and surveys targeting local forest communities and associations, data were collected to identify the most common practices, perceptions of environmental risks, and the main obstacles that influence their daily management. The level of community participation in public policies and existing support instruments is also analyzed. The results show that many active communities carry out preventive tasks, such as clearing brush or maintaining buffer zones, and show a growing interest in more sustainable, diverse, and territorially-linked management models. It also includes frequent demands for improved inter-administrative coordination, streamlining bureaucratic procedures, and recognition of the work these communities carry out throughout Galicia. This work aims to contribute to the recognition of the efforts of these local entities and reflect on the need to strengthen public and social support as an essential condition for moving toward more effective forest management, capable of reducing expected environmental impacts and generating opportunities for sustainable development in rural areas.
This project addresses forest management, climate change, and wildfires in Galicia from the perspective of local forest communities in common ownership. This proposal stems from the need to delve deeper into the role that local forest management can play in the face of growing environmental challenges, in a context where land abandonment and the lack of seasonal continuity in rural areas contribute to increased fire risk and ecosystem deterioration. Through a methodological combination based on a literature review, expert interviews, and surveys targeting local forest communities and associations, data were collected to identify the most common practices, perceptions of environmental risks, and the main obstacles that influence their daily management. The level of community participation in public policies and existing support instruments is also analyzed. The results show that many active communities carry out preventive tasks, such as clearing brush or maintaining buffer zones, and show a growing interest in more sustainable, diverse, and territorially-linked management models. It also includes frequent demands for improved inter-administrative coordination, streamlining bureaucratic procedures, and recognition of the work these communities carry out throughout Galicia. This work aims to contribute to the recognition of the efforts of these local entities and reflect on the need to strengthen public and social support as an essential condition for moving toward more effective forest management, capable of reducing expected environmental impacts and generating opportunities for sustainable development in rural areas.
Direction
REYES FERREIRA, OTILIA (Tutorships)
Blanco Ballón, Jorge Manuel (Co-tutorships)
Cruz de la Fuente, Óscar (Co-tutorships)
REYES FERREIRA, OTILIA (Tutorships)
Blanco Ballón, Jorge Manuel (Co-tutorships)
Cruz de la Fuente, Óscar (Co-tutorships)
Court
RODRÍGUEZ SOALLEIRO, ROQUE (Chairman)
GARCIA GUIMAREY, MARIA JESUS (Secretary)
SEOANE IGLESIAS, NATALIA (Member)
RODRÍGUEZ SOALLEIRO, ROQUE (Chairman)
GARCIA GUIMAREY, MARIA JESUS (Secretary)
SEOANE IGLESIAS, NATALIA (Member)
Characterization and removal of background in the muon system of the LHCb experiment for long-lived particles searches (Specialization in Nuclear and Particle Physics)
Authorship
A.M.A.
Master in Physics
A.M.A.
Master in Physics
Defense date
07.16.2025 09:00
07.16.2025 09:00
Summary
This study presents two main contributions for long-lived particle (LLP) searches within the muon system (MS) of the LHCb experiment: (1) an improvement to the existing trigger line designed to target events with LLP signatures in the MS, and (2) the development of a new method for background suppression. The existing trigger line, which had been prescaled due to high sensitivity to data-taking conditions, was found to suffer from a hit multiplicity mismatch between Monte Carlo (MC) samples and real data. A solution currently under development is based on signal reweighting and algorithm retraining, using the reweighted MC signal sample as signal and HLT1 filtered data as background. In parallel, a novel method for background suppression is introduced, addressing a characteristic type of background associated with reconstructed tracks in the event. This background constitutes a significant contribution (50/80%) in the outer regions of the MS. A hypothetical neutral Beyond-the-Standard-Model (BSM) particle, referred to as S, is used as a benchmark model. Originating from the decay of a B meson, this particle is studied at several lifetimes (1, 5, 10, and 50 ns). The method involves extrapolating reconstructed tracks from upstream LHCb subdetectors to the MS, associating them with MS hits using a custom metric similar to a chi-squared, and training a custom neural network model to distinguish signal from background based on this and other track level features. The results demonstrate signal efficiencies of approximately 80% at a background rejection of 90% in the outer MS regions (R3 and R4) and values of 80/90% signal efficiency at a more conservative 50% background rejection in the inner regions (R1 and R2). These developments complement a previous 2024 study on BSM signal reconstruction and represent a significant advancement in LLP detection within the LHCb muon system.
This study presents two main contributions for long-lived particle (LLP) searches within the muon system (MS) of the LHCb experiment: (1) an improvement to the existing trigger line designed to target events with LLP signatures in the MS, and (2) the development of a new method for background suppression. The existing trigger line, which had been prescaled due to high sensitivity to data-taking conditions, was found to suffer from a hit multiplicity mismatch between Monte Carlo (MC) samples and real data. A solution currently under development is based on signal reweighting and algorithm retraining, using the reweighted MC signal sample as signal and HLT1 filtered data as background. In parallel, a novel method for background suppression is introduced, addressing a characteristic type of background associated with reconstructed tracks in the event. This background constitutes a significant contribution (50/80%) in the outer regions of the MS. A hypothetical neutral Beyond-the-Standard-Model (BSM) particle, referred to as S, is used as a benchmark model. Originating from the decay of a B meson, this particle is studied at several lifetimes (1, 5, 10, and 50 ns). The method involves extrapolating reconstructed tracks from upstream LHCb subdetectors to the MS, associating them with MS hits using a custom metric similar to a chi-squared, and training a custom neural network model to distinguish signal from background based on this and other track level features. The results demonstrate signal efficiencies of approximately 80% at a background rejection of 90% in the outer MS regions (R3 and R4) and values of 80/90% signal efficiency at a more conservative 50% background rejection in the inner regions (R1 and R2). These developments complement a previous 2024 study on BSM signal reconstruction and represent a significant advancement in LLP detection within the LHCb muon system.
Direction
CID VIDAL, XABIER (Tutorships)
VAZQUEZ SIERRA, CARLOS (Co-tutorships)
CID VIDAL, XABIER (Tutorships)
VAZQUEZ SIERRA, CARLOS (Co-tutorships)
Court
ARMESTO PEREZ, NESTOR (Chairman)
ALVAREZ POL, HECTOR (Secretary)
EDELSTEIN GLAUBACH, JOSE DANIEL (Member)
ARMESTO PEREZ, NESTOR (Chairman)
ALVAREZ POL, HECTOR (Secretary)
EDELSTEIN GLAUBACH, JOSE DANIEL (Member)
Calibration plan for radioactive samples in the Water Cherenkov Test Experiment (WCTE) (Specialization in Nuclear and Particle Physics)
Authorship
J.S.M.J.
Master in Physics
J.S.M.J.
Master in Physics
Defense date
07.16.2025 09:00
07.16.2025 09:00
Summary
This work presents a study of the state of the art of neutrino oscillators and their impact on measurements performed with detectors. A general description of a Cherenkov detector is given, followed by a more detailed explanation of the Hyper-K experiment, which is inspired by Super-Kamiokande and its results. The WCTE experiment is also described. All radiation phenomena involved in neutron capture within WCTE are analyzed, highlighting the complications arising from undesired physical interactions. Finally, the study and results of the WCTE calibration using an AmBe source are presented, yielding a result of 17 Hz/PMT. Based on this value, it is concluded that to achieve a statistical error equal to or less than 1 \%, the source must remain in the detector for approximately 573 seconds.
This work presents a study of the state of the art of neutrino oscillators and their impact on measurements performed with detectors. A general description of a Cherenkov detector is given, followed by a more detailed explanation of the Hyper-K experiment, which is inspired by Super-Kamiokande and its results. The WCTE experiment is also described. All radiation phenomena involved in neutron capture within WCTE are analyzed, highlighting the complications arising from undesired physical interactions. Finally, the study and results of the WCTE calibration using an AmBe source are presented, yielding a result of 17 Hz/PMT. Based on this value, it is concluded that to achieve a statistical error equal to or less than 1 \%, the source must remain in the detector for approximately 573 seconds.
Direction
HERNANDO MORATA, JOSE ANGEL (Tutorships)
Costas Rodríguez, Diego (Co-tutorships)
HERNANDO MORATA, JOSE ANGEL (Tutorships)
Costas Rodríguez, Diego (Co-tutorships)
Court
ARMESTO PEREZ, NESTOR (Chairman)
ALVAREZ POL, HECTOR (Secretary)
EDELSTEIN GLAUBACH, JOSE DANIEL (Member)
ARMESTO PEREZ, NESTOR (Chairman)
ALVAREZ POL, HECTOR (Secretary)
EDELSTEIN GLAUBACH, JOSE DANIEL (Member)
Axion-like particles seachers at LHCb (Specialty in Nuclear and Particle Physics)
Authorship
A.N.C.
Master in Physics
A.N.C.
Master in Physics
Defense date
07.16.2025 09:00
07.16.2025 09:00
Summary
Axion-Like Particles (ALPs) are hypothetical particles corresponding to one of the most popular extensions to the Standard Model and which solve some of the open questions of this theory, such as the strong CP problem. The LHCb is one of the detectors in the particle accelerator LHC and is presented as a powerful option for ALP detection. In this work, two projects in the context of ALP detection at LHCb are presented. The first one deals with the update of a line in the last part of the LHCb online trigger, the HLT2. The goal is to modify the parameters for the conservation of ALP candidates taking advantage of the photon coupling. The introduced changes seek to make use of the newly available data from the LHCb calorimeters during LHC Run 3. The second one proposes a complete analysis and characterization of the detection of an ALP decaying to eta pi pi in LHCb by means of a BDT classifier trained with real data and Monte Carlo simulation. The efficiency of the developed algorithm is tested on combinatorial background data collected during LHC Run 2.
Axion-Like Particles (ALPs) are hypothetical particles corresponding to one of the most popular extensions to the Standard Model and which solve some of the open questions of this theory, such as the strong CP problem. The LHCb is one of the detectors in the particle accelerator LHC and is presented as a powerful option for ALP detection. In this work, two projects in the context of ALP detection at LHCb are presented. The first one deals with the update of a line in the last part of the LHCb online trigger, the HLT2. The goal is to modify the parameters for the conservation of ALP candidates taking advantage of the photon coupling. The introduced changes seek to make use of the newly available data from the LHCb calorimeters during LHC Run 3. The second one proposes a complete analysis and characterization of the detection of an ALP decaying to eta pi pi in LHCb by means of a BDT classifier trained with real data and Monte Carlo simulation. The efficiency of the developed algorithm is tested on combinatorial background data collected during LHC Run 2.
Direction
CID VIDAL, XABIER (Tutorships)
Casais Vidal, Adrián (Co-tutorships)
CID VIDAL, XABIER (Tutorships)
Casais Vidal, Adrián (Co-tutorships)
Court
SABORIDO SILVA, JUAN JOSE (Chairman)
ALEJO ALONSO, AARON JOSE (Secretary)
CAAMAÑO FRESCO, MANUEL (Member)
SABORIDO SILVA, JUAN JOSE (Chairman)
ALEJO ALONSO, AARON JOSE (Secretary)
CAAMAÑO FRESCO, MANUEL (Member)
Reducing the urban heat island effect in parks/squares
Authorship
N.P.G.
Master in Renewable Energies, Climate Change and Sustainable Development
N.P.G.
Master in Renewable Energies, Climate Change and Sustainable Development
Defense date
07.16.2025 09:30
07.16.2025 09:30
Summary
This work addresses the study of the urban heat island effect and examines whether a square in the historic center of Santiago de Compostela can act as a mitigating space for this phenomenon. Using a mixed methodology, nine urban squares were evaluated according to physical, environmental, and social criteria, selecting Praza de Fonseca as the case study. Its historical evolution and environmental composition were analyzed. A public survey was also conducted, revealing the importance that the population places on shade, vegetation, and the presence of water in public spaces. The results show that the square contributes to thermal mitigation thanks to its green infrastructure, central fountain, natural ventilation, and spatial organization. Despite the use of low-reflectivity materials such as granite and the urban planning limitations of the historic center, the space demonstrates good climatic performance. It is concluded that, even in contexts with restrictions, it is possible to improve thermal comfort through adapted and sustainable interventions. Strengthening green infrastructure or integrating climate criteria into urban planning is key to moving toward more resilient cities in the face of climate change.
This work addresses the study of the urban heat island effect and examines whether a square in the historic center of Santiago de Compostela can act as a mitigating space for this phenomenon. Using a mixed methodology, nine urban squares were evaluated according to physical, environmental, and social criteria, selecting Praza de Fonseca as the case study. Its historical evolution and environmental composition were analyzed. A public survey was also conducted, revealing the importance that the population places on shade, vegetation, and the presence of water in public spaces. The results show that the square contributes to thermal mitigation thanks to its green infrastructure, central fountain, natural ventilation, and spatial organization. Despite the use of low-reflectivity materials such as granite and the urban planning limitations of the historic center, the space demonstrates good climatic performance. It is concluded that, even in contexts with restrictions, it is possible to improve thermal comfort through adapted and sustainable interventions. Strengthening green infrastructure or integrating climate criteria into urban planning is key to moving toward more resilient cities in the face of climate change.
Direction
VAAMONDE LONGUEIRA, JOSÉ FRANCISCO (Tutorships)
VAAMONDE LONGUEIRA, JOSÉ FRANCISCO (Tutorships)
Court
RODRÍGUEZ SOALLEIRO, ROQUE (Chairman)
GARCIA GUIMAREY, MARIA JESUS (Secretary)
SEOANE IGLESIAS, NATALIA (Member)
RODRÍGUEZ SOALLEIRO, ROQUE (Chairman)
GARCIA GUIMAREY, MARIA JESUS (Secretary)
SEOANE IGLESIAS, NATALIA (Member)
Design and characterization of a sensor integrated into a microfluidic device (Light and radiation physics)
Authorship
P.P.L.
Master in Physics
P.P.L.
Master in Physics
Defense date
07.16.2025 10:00
07.16.2025 10:00
Summary
This work focuses on the design and characterization of an optical sensor integrated into microfluidic devices made with polydimethylsiloxane (PDMS). The objective is to detect Rhodamine 6G fluorescence in liquid samples, comparing different light sources, volumes, and concentrations. The fabrication of the PDMS chips, carried out using soft lithography, was complemented by an oxygen plasma treatment to enhance surface hydrophilicity, significantly reducing the water contact angle. It was confirmed that the fluorescence intensity is directly proportional to the sample's concentration and volume. Laser excitation (408.19 nm) proved more efficient than LED excitation (450.80 nm) in inducing fluorescence. The zigzag channels demonstrated the ability to effectively mix fluids and collect the signal. Limitations included challenges in PDMS sealing, variability in experimental setup, and the presence of bubbles in the samples. Proposed improvements for future applications include the automation of experimental assembly and fluid filling.
This work focuses on the design and characterization of an optical sensor integrated into microfluidic devices made with polydimethylsiloxane (PDMS). The objective is to detect Rhodamine 6G fluorescence in liquid samples, comparing different light sources, volumes, and concentrations. The fabrication of the PDMS chips, carried out using soft lithography, was complemented by an oxygen plasma treatment to enhance surface hydrophilicity, significantly reducing the water contact angle. It was confirmed that the fluorescence intensity is directly proportional to the sample's concentration and volume. Laser excitation (408.19 nm) proved more efficient than LED excitation (450.80 nm) in inducing fluorescence. The zigzag channels demonstrated the ability to effectively mix fluids and collect the signal. Limitations included challenges in PDMS sealing, variability in experimental setup, and the presence of bubbles in the samples. Proposed improvements for future applications include the automation of experimental assembly and fluid filling.
Direction
Gómez Varela, Ana Isabel (Tutorships)
BAO VARELA, Mª CARMEN (Co-tutorships)
Gómez Varela, Ana Isabel (Tutorships)
BAO VARELA, Mª CARMEN (Co-tutorships)
Court
DE LA FUENTE CARBALLO, RAUL (Chairman)
MOURIZ CEREIJO, MARIA DOLORES (Secretary)
LOPEZ LAGO, MARIA ELENA (Member)
DE LA FUENTE CARBALLO, RAUL (Chairman)
MOURIZ CEREIJO, MARIA DOLORES (Secretary)
LOPEZ LAGO, MARIA ELENA (Member)
Simulation and analysis of the effectiveness of advanced materials for structural coatings in fusion reactors using Geant4 (Nuclear and Particle Physics)
Authorship
L.D.R.O.
Master in Physics
L.D.R.O.
Master in Physics
Defense date
07.16.2025 09:00
07.16.2025 09:00
Summary
This Master's Thesis analyzes the behavior of various advanced material configurations under neutron irradiation typical of the internal environment of a fusion reactor. To this end, neutron transport simulations are carried out using the Monte Carlo method with the Geant4 toolkit. The study focuses on two representative designs from European fusion programs: one based on a liquid lithium-lead alloy, and another employing a ceramic blanket combined with beryllium as a neutron multiplier. Using a simplified geometry, the simulations enable the analysis of neutron transport and energy deposition, as well as the generation of secondary particles in each material. This framework allows for a comparative evaluation of both designs in terms of radiation shielding effectiveness, tritium breeding capability, and structural damage accumulation, quantified through atomic displacements and gas production.
This Master's Thesis analyzes the behavior of various advanced material configurations under neutron irradiation typical of the internal environment of a fusion reactor. To this end, neutron transport simulations are carried out using the Monte Carlo method with the Geant4 toolkit. The study focuses on two representative designs from European fusion programs: one based on a liquid lithium-lead alloy, and another employing a ceramic blanket combined with beryllium as a neutron multiplier. Using a simplified geometry, the simulations enable the analysis of neutron transport and energy deposition, as well as the generation of secondary particles in each material. This framework allows for a comparative evaluation of both designs in terms of radiation shielding effectiveness, tritium breeding capability, and structural damage accumulation, quantified through atomic displacements and gas production.
Direction
AYYAD LIMONGE, FRANCESC YASSID (Tutorships)
AYYAD LIMONGE, FRANCESC YASSID (Tutorships)
Court
ARMESTO PEREZ, NESTOR (Chairman)
ALVAREZ POL, HECTOR (Secretary)
EDELSTEIN GLAUBACH, JOSE DANIEL (Member)
ARMESTO PEREZ, NESTOR (Chairman)
ALVAREZ POL, HECTOR (Secretary)
EDELSTEIN GLAUBACH, JOSE DANIEL (Member)
Development and validation of a system for predicting molecular physicochemical properties using graph-based neural networks (Specialization in Matter Physics)
Authorship
A.V.B.
Master in Physics
A.V.B.
Master in Physics
Defense date
07.17.2025 10:30
07.17.2025 10:30
Summary
In this work, we develop a graph-based neural network aimed at predicting the partial atomic charge of organic molecules. The main novelty proposed is a methodology for data processing, which consists of splitting the molecules into fixed-size fragments, allowing the use of a single network architecture to process compounds with a variable number of atoms. This strategy proves to be useful, achieving results comparable to those reported in the current literature.
In this work, we develop a graph-based neural network aimed at predicting the partial atomic charge of organic molecules. The main novelty proposed is a methodology for data processing, which consists of splitting the molecules into fixed-size fragments, allowing the use of a single network architecture to process compounds with a variable number of atoms. This strategy proves to be useful, achieving results comparable to those reported in the current literature.
Direction
Prieto Estévez, Gerardo (Tutorships)
DOMINGUEZ ARCA, VICENTE (Co-tutorships)
Prieto Estévez, Gerardo (Tutorships)
DOMINGUEZ ARCA, VICENTE (Co-tutorships)
Court
FERNANDEZ PEREZ, JOSEFA (Chairman)
PARDO CASTRO, VICTOR (Secretary)
CASTRO PAREDES, FRANCISCO JAVIER (Member)
FERNANDEZ PEREZ, JOSEFA (Chairman)
PARDO CASTRO, VICTOR (Secretary)
CASTRO PAREDES, FRANCISCO JAVIER (Member)
Initial calibration of the NEXT-100 detector. (Mention in Nuclear and Particle Physics)
Authorship
P.V.C.
Master in Physics
P.V.C.
Master in Physics
Defense date
07.16.2025 09:00
07.16.2025 09:00
Summary
The detector NEXT-100 began operations in 2024 at Laboratorio Subterráneo de Canfranc. This is the latest in a detector series used to search for the neutrinoless double-beta decay in high-pressure, gaseous 136Xe. Observing this decay would prove the Majorana nature of neutrinos and, consequently, that these particles are their own antiparticles. This project focuses on the initial calibration of the detector. To this end, 83mKr sources are used since the this decay produces a pointlike energy deposition by emitting electrons with well-known energy (41.5 keV), it is possible to determine geometrical, temporal and energetic corrections in the whole volume of the detector.
The detector NEXT-100 began operations in 2024 at Laboratorio Subterráneo de Canfranc. This is the latest in a detector series used to search for the neutrinoless double-beta decay in high-pressure, gaseous 136Xe. Observing this decay would prove the Majorana nature of neutrinos and, consequently, that these particles are their own antiparticles. This project focuses on the initial calibration of the detector. To this end, 83mKr sources are used since the this decay produces a pointlike energy deposition by emitting electrons with well-known energy (41.5 keV), it is possible to determine geometrical, temporal and energetic corrections in the whole volume of the detector.
Direction
HERNANDO MORATA, JOSE ANGEL (Tutorships)
HERVES CARRETE, CARLOS (Co-tutorships)
HERNANDO MORATA, JOSE ANGEL (Tutorships)
HERVES CARRETE, CARLOS (Co-tutorships)
Court
SABORIDO SILVA, JUAN JOSE (Chairman)
ALEJO ALONSO, AARON JOSE (Secretary)
CAAMAÑO FRESCO, MANUEL (Member)
SABORIDO SILVA, JUAN JOSE (Chairman)
ALEJO ALONSO, AARON JOSE (Secretary)
CAAMAÑO FRESCO, MANUEL (Member)
Two-dimensional functional materials: Implementation of a system for the obtainement, deterministic transfer and electrical characterization of Van der Waals nanoflakes (Speciality in Matter Physics)
Authorship
P.G.V.P.
Master in Physics
P.G.V.P.
Master in Physics
Defense date
07.17.2025 10:30
07.17.2025 10:30
Summary
This work presents the implementation, for the first time in the QMatterPhotonics group at the University of Santiago de Compostela, of an experimental system for the fabrication of two-dimensional materials via exfoliation and deterministic dry-transfer. The developed setup integrates optical microscopy and three-dimensional micrometric positioning components, and employs viscoelastic polydimethylsiloxane (PDMS) films as the intermediate transfer medium. This technique enables the precise isolation and manipulation of flakes with micrometric lateral dimensions and nanometric (or even atomic) thicknesses of two-dimensional materials with weak interlayer cohesion, known as Van der Waals nanoflakes. Specifically, we have successfully obtained and transferred NbSe2 nanoflakes onto various substrates, including glass, gold, aluminum, and superconducting YBa2Cu3O7. The work also presents the fabrication of a device for the electrical characterization of the nanoflakes, produced by metal evaporation using a custom-designed micrometric shadow mask. Initial current-voltage measurements of nanoflakes transferred onto the device are also reported. These two developments represent the initial stages of a broader research project carried out by the QMatterPhotonics group aimed at the fabrication of novel optical nanosensors with single-photon sensitivity, for applications in quantum communications. Our results demonstrate the feasibility of the dry-transfer method using PDMS for the creation of such nanodevices.
This work presents the implementation, for the first time in the QMatterPhotonics group at the University of Santiago de Compostela, of an experimental system for the fabrication of two-dimensional materials via exfoliation and deterministic dry-transfer. The developed setup integrates optical microscopy and three-dimensional micrometric positioning components, and employs viscoelastic polydimethylsiloxane (PDMS) films as the intermediate transfer medium. This technique enables the precise isolation and manipulation of flakes with micrometric lateral dimensions and nanometric (or even atomic) thicknesses of two-dimensional materials with weak interlayer cohesion, known as Van der Waals nanoflakes. Specifically, we have successfully obtained and transferred NbSe2 nanoflakes onto various substrates, including glass, gold, aluminum, and superconducting YBa2Cu3O7. The work also presents the fabrication of a device for the electrical characterization of the nanoflakes, produced by metal evaporation using a custom-designed micrometric shadow mask. Initial current-voltage measurements of nanoflakes transferred onto the device are also reported. These two developments represent the initial stages of a broader research project carried out by the QMatterPhotonics group aimed at the fabrication of novel optical nanosensors with single-photon sensitivity, for applications in quantum communications. Our results demonstrate the feasibility of the dry-transfer method using PDMS for the creation of such nanodevices.
Direction
VAZQUEZ RAMALLO, MANUEL (Tutorships)
VAZQUEZ RAMALLO, MANUEL (Tutorships)
Court
FERNANDEZ PEREZ, JOSEFA (Chairman)
PARDO CASTRO, VICTOR (Secretary)
CASTRO PAREDES, FRANCISCO JAVIER (Member)
FERNANDEZ PEREZ, JOSEFA (Chairman)
PARDO CASTRO, VICTOR (Secretary)
CASTRO PAREDES, FRANCISCO JAVIER (Member)