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Master's Dissertation
DOI
https://doi.org/10.11606/D.43.2007.tde-05102007-054422
Document
Author
Full name
Bruno Rodrigues Lenzi
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2007
Supervisor
Committee
Dietzsch, Olacio (President)
Albuquerque, Ivone Freire da Mota e
Fauth, Anderson Campos
Title in Portuguese
Identificação de elétrons com um detector de radiação de transição em colisões de íons pesados relativísticos
Keywords in Portuguese
detectores
Física de altas energias
identificação de partículas
íons pesados relativísticos
radiação de transição
Abstract in Portuguese
Este trabalho descreve o desenvolvimento de um simulador para as câmaras de expansão temporal / detectores de radiação de transição (TEC / TRD) do experimento PHENIX, instalado no Colisor de Íons Pesados Relativisticos (RHIC) do Laboratório Nacional de Brookhaven (BNL) nos EUA. O programa do RHIC prevê a produção e caracterização de um estado da matéria conhecido como plasma de quarks e glúons (QGP), através de colisões entre prótons, dêuterons e íons pesados com energias de centro de massa sqrt(s_NN) entre 20 e 200 GeV. O PHENIX, um dos quatro experimentos instalados no acelerador, é especializado na medida de sinais eletrofracos provenientes das colisões e o TEC / TRD é o único subsistema do PHENIX capaz de identificar elétrons de forma eficiente para momentos acima de 5 GeV/c. Um simulador para reprodução da resposta do detector à passagem de partículas foi desenvolvido e comparado a dados de um detector proporcional monofilar construído no Laboratório de Instrumentação e Partículas da USP, e aos dados do próprio TEC / TRD. Os resultados mostram um acordo razoável entre medidas e simulações. O uso do simulador deverá permitir o estudo de novos métodos e melhoras na capacidade de identificação de elétrons do sistema.
Title in English
Electron identification with a transition radiation detector in relativistic heavy ion collisions
Keywords in English
detectors
High energy physics
particle identification
relativistic heavy ions
transition radiation
Abstract in English
The present work describes the development of a simulator for the Time Expansion Chambers / Transition Radiation Detectors (TEC / TRD) of the PHENIX experiment, installed at the Relativistic Heavy Ion Collider (RHIC) of Brookhaven National Laboratory (BNL). The main goal of the RHIC project is the production and study of a state of matter known as Quark Gluon Plasma (QGP), through collisions of protons, deuterons and heavy ions at center of mass energies sqrt(s_NN) ranging between 20 and 200 GeV. PHENIX, one of the four experiments of the accelerator, is dedicated to measuring electroweak signals arising from the collisions, and TEC / TRD is the only subsystem capable of identifying efficiently electrons with momenta above 5 GeV/c. A simulator to reproduce the detector response to the passage of particles was developed and compared to data from a single wire proporcional counter and from TEC / TRD itself. The results show reasonable agreement between measurements and simulations. The use of the simulator allows studies of new methods and possibly improvements in the electron identification capability of the system.
 
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dissertacao.pdf (4.28 Mbytes)
Publishing Date
2007-10-19
 
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