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Performance of the TileCal High Voltage Upgrade System

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Resumo:The work done under the scope of this thesis is part of the HV Remote project, whose main purpose is to create a remote high voltage (HV) regulation and distribution system for ATLAS Tile Calorimeter’s (TileCal) photomultiplier tubes (PMTs). This system is made up of a high voltage supply board, the HV Supplies board, coupled to a high voltage regulation and distribution board, the HV Remote board, which will be connected to the PMTs via 100 m cables. Both boards will be controlled by a Field-Programmable Gate Array (FPGA) development board using the Serial Peripheral Interface (SPI) protocol. To supply all of the existing PMTs in TileCal, 256 pairs of HV Remote and HV Supplies boards will be manufactured, with each pair of boards and their respective FPGA board supplying a dedicated HV to 48 PMTs. The second prototype of the HV Remote board has already been produced and, at the moment, a third prototype is in production. This work will mainly focus on the functional, stability and load tests of the second prototype of the HV Remote, both in the laboratory environment and in the CERN Test Beam. The cables that will connect the HV Remote to the TileCal PMTs need to be tested in order to characterise their behaviour and influence on the HV transmitted. As such, another important part of this work is the creation of a Cable Test board, which, when used in conjunction with a selection board, the HV Reading board, will allow the user to select a cable, supply it with a specified HV and perform continuity and real-time voltage readings at the terminals of each one of the cables. In addition, it will allow measurements of the voltage of each of the cables’ ground and shield signals and supply an HV to be used during the tests generated by a DC/DC converter. The board’s schematics and Printed Circuit Board (PCB) were developed using the Altium Designer Tool, version 22. The Cable Test board control software was also developed, as well as a Graphical User Interface (GUI), which will allow the user to perform quick readings and data acquisition of the different parameters. The aforementioned software was written in the Python 3 language with object-orienting programming, specifically designed to function with a Raspberry Pi development board.
Autores principais:Pereira, Catarina José Ponte
Assunto:TileCal Sistema de Distribuição de Alta Tensão Desenho de PCBs Teste de Cabos SPI Teses de mestrado - 2023
Ano:2023
País:Portugal
Tipo de documento:dissertação de mestrado
Tipo de acesso:acesso aberto
Instituição associada:Universidade de Lisboa
Idioma:inglês
Origem:Repositório da Universidade de Lisboa

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