학술논문
The CDF time of flight detector
Document Type
Conference
Author
Cabrera, S.; Fernandez, J.; Gomez, G.; Piedra, J.; Rodrigo, T.; Ruiz, A.; Vila, I.; Vilar, R.; Grozis, C.; Kephart, R.; Stanek, R.; Kim, D.H.; Kim, M.S.; Oh, Y.; Kim, Y.K.; Veramendi, G.; Anikeev, K.; Bauere, G.; Furic, I.K.; Korn, A.; Kravchenko, I.; Mulhearn, M.; Paus, C.; Pavlon, S.; Sumorok, K.; Chen, C.; Jones, M.; Kononenko, W.; Kroll, J.; Mayers, G.M.; Newcomer, F.M.; Oldeman, R.G.C.; Usynin, D.; Van Berg, R.; Bellettini, G.; Cerri, C.; Menzione, A.; Spinella, H.; Vataga, E.; De Cecco, S.; De Pedis, D.; Dionisi, C.; Giagu, S.; De Girolamo, A.; Rescigno, M.; Zanello, L.; Ahn, M.; Kim, B.J.; Kim, S.B.; Cho, I.; Lee, J.; Yu, I.; Kaneko, H.; Kazama, A.; Kim, S.; Sato, K.; Ukegawa, F.
Source
2003 IEEE Nuclear Science Symposium. Conference Record (IEEE Cat. No.03CH37515) Nuclear science symposium Nuclear Science Symposium Conference Record, 2003 IEEE. 1:223-227 Vol.1 2003
Subject
Language
ISSN
1082-3654
Abstract
A new Time of Flight (TOF) detector based on scintillator bars with fine-mesh photomultipliers at both ends has been in operation since 2001 in the CDF experiment. With a design resolution of 100 ps, the TOF can provide separation between K/sup /spl plusmn// and /spl pi//sup /spl plusmn// in pp~ collisions at the 2/spl sigma/ level for low momentum, which enhances b flavor tagging capabilities. Because of its very fast response, the TOF is an excellent triggering device, and it is used to trigger on highly ionizing particles, multiple minimum ionizing particles and cosmic rays. Particle identification is achieved by comparing the time-of-flight of the particle measured by the TOF to the time expected for a given mass hypothesis. In order to obtain the resolution necessary for particle ID, optimal calibrations are critical. This paper describes the TOF detector, its calibration procedure, the achieved resolution, the long term operation performances and some of the first results from data analysis using this detector.