The cosmic ray veto system of the Mario Schenberg gravitational wave detector

Autor(es)

Da Silva Costa, C. F. ^{[1, 2]} ; Fauth, A. C. ^[3] ; Pereira, L. A. S. ^[2] ; Aguiar, O. D. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Fis, BR-05508900 Sao Paulo - Brazil

^[2] INPE, Dept Astrofis, BR-12227010 Sao Jose Dos Campos - Brazil

^[3] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SP; v. 752, p. 65-70, JUL 11 2014.
• Citações Web of Science: 1

Resumo

The Mario Schenberg gravitational wave antenna is a spherical cryogenic resonant mass detector located at IFUSP, Sao Paulo, It is well known that cosmic rays interact with cryogenic resonant mass detectors generating acoustic signals. Depending on the shower energy, they could provide a substantial background noise which should be vetoed to reduce the false alarm rate. For this purpose, in December 2011, we have installed a cosmic ray veto system which is, since then, acquiring data. The cosmic ray veto system is composed of three particle detectors containing each one a scintillator, a photomultiplier and a tension divider. As the shower number of particles is used to define a threshold for the veto, it is important that the cosmic ray veto provides a linear response to high-energy cosmic ray events. The veto setup response was optimized and allows measurements up to 23,000 equivalent muon charge particles per square meter. We present here the experimental setup, its calibration and performance. Finally, to confirm the linearity of the data acquisition we show the measured particle multiplicity. (C) 2014 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 13/00621-5 - Veto de raios cômicos da antena gravitacional Schenberg
• Beneficiário: Luiz Augusto Stuani Pereira
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 06/56041-3 - Nova física no espaço: ondas gravitacionais
• Beneficiário: Odylio Denys de Aguiar
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 10/09101-6 - Desenvolvimento da cadeia de análise de dados para sinais impulsivos e periódicos para o detector de ondas gravitacionais Mario Schenberg e estudo de viabilidade da utilização de osciladores de microondas no espaço
• Beneficiário: Carlos Filipe da Silva Costa
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado