Desenvolvimento de simulador para o sistema multiplexador SQUID de micro-ondas baseado em calorímetros metálicos magnéticos
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Data
2021-01-18
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Universidade Federal de Goiás
Resumo
This work focuses on two main objectives: to study the phenomena of detection of
fundamental particles incidence in a system called microwave SQUID multiplexer and
to present the current results of a simulation toolbox developed for the multiplexer. This
system can detect detecting little quantities of energy that are absorbed in pixels of
magnetic metallic calorimeters detectors that operate in cryogenic regions (extremely
close to absolute zero). This type of detector has a para-magnetic metallic sensor that
is positioned in a weak magnetic field region and due to small temperature fluctuations
caused by the incidence of energized particles, it converts into a magnetic flux variation.
These sensors are integrated in the microwave SQUID multiplexer system and these
flux variations due to incident energized particles can be read electronically by using
high-precision interferometers such as the SQUID. Its behavior is analogue to a variable
coil, which is controlled by the present magnetic flux variation. This coil is connected
to a quarter wave resonator acting as a termination of a superconducting transmission
line. By this, the resonance frequency of the entire cluster, also considering the presence
of a coupling capacitance, will be modulated according to the magnetic flux translated
by the SQUID. Besides the flux that came from energized particles, the current system
employs a magnetic flux ramp modulation that adjusts the operating point of the SQUID.
By this, this multiplexing system is capable of realize the communication of hundreds or
thousands of sensors using hardware for signal processing and therefore the strategy of
frequency division is adopted, operating in the spectrum region that goes from 4 GHz to
8 GHz. A comb of complex carrier wave frequencies is used in the resonator’s circuits,
performing a phase and amplitude modulation according to each resonator behavior and
at the end of the chain the information obtained can be demodulated and estimated. This
work also contemplates the development of a simulation model of this technology based
on the current stage of the ECHo project and displayed in the MATLAB programming
language. For this purpose, a good programming practices manual was also developed in
order to support the process of creating and updating of the toolbox. Through the results
obtained in simulations, it is intended to validate the toolbox developed by reproducing
results already presented in the literature of this technology. Possible future discussions
will also be presented in order to continue studies in this area.
Descrição
Palavras-chave
MuSQUIDmux, Simulação, Matlab, Algorithms and computer programming, Microwave SQUID multiplexer, Telecommunications theory, Multiplexing, Particle physics, Simulation
Citação
CUNHA, João Vitor Rezende da. Desenvolvimento de simulador para o sistema multiplexador SQUID de micro-ondas baseado em calorímetros metálicos magnéticos. 2021. 84 f. Trabalho de Conclusão de Curso (Graduação) - Escola de Engenharia Elétrica, Mecânica e de Computação, Universidade Federal de Goiás, Goiânia, 2021.