Abstract:
The use of TPCs (Time Projection Chambers) in particle physics experiments has been growing since their invention, and with it the development of their reading planes, reaching sizes equivalent to buildings. But its use in what are usually called unlikely event experiments has been more recent.
This thesis focuses on charge reading planes for experiments to search for unlikely events that use gaseous TPCs as a detection principle, developing within the framework of two of this type of experiments: in the PandaX‐III experiment, for the search of neutrinoless double beta decay, and in the TREX‐DM experiment, for the search for WIMP. In both cases, a large gas TPC is used, making it necessary for the corresponding reading plane to be large as well.
The future of both types of experiments involves the construction of increasingly larger detectors, and with it the reading planes that are associated with them. Both the PandaX‐III experiment and the TREX‐DM experiment use Microbulk type Micromegas readout planes. This technology has established itself in recent years and undergoes continuous improvement, although one of its limitations consists of the maximum sizes that can be manufactured.
In addition to the two reading planes for both experiments, this work also develops a new combined reading plane Micromegas plus GEM (Gas Electron Multiplier), which allows a pre-amplification of the electrons from ionization in the TPC and, With this, a very important increase in profit. Within this thesis, a highly sensitive alpha particle detector is also developed, called AlphaCAMM, which is part of the strategy of these experiments to reduce their background level.
Date: Monday, July 15, 2024
Time: 12:00 hours
Location: Degree Room of the Faculty of Sciences
