The time-of-flight system for CLAS

Journal Article · Mon Feb 01 04:00:00 EST 1999 · Nuclear Instrumentation and Methods A

DOI:https://doi.org/10.1016/S0168-9002(99)00484-2· OSTI ID:754024

Smith, E S; Carstens, T; Distelbrink, J ^[1]

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1. and others

The time-of-flight system for the CEBAF Large Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility is described. The system, covering an area of 206-square-meters, is composed of scintillation counters 5.08 cm thick, 15 and 22 cm wide, and lengths which vary from 32 cm at the most forward angle to 450 cm at larger angles. All of the components of the system have been designed to optimize the time resolution. Event timing, achieved by leading-edge discrimination with time-walk correction, has been measured with cosmic rays, a laser pulser, and known particle interactions. The intrinsic time resolution varies from about 80 ps for the short counters to 160 ps for the longer counters. Reconstruction of interacting particles during the first period of operation yields an average time resolution for electrons of 163 ps.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 754024
• Report Number(s): DOE/ER/40150-1335; JLAB-PHY-99-03
• Journal Information: Nuclear Instrumentation and Methods A, Journal Name: Nuclear Instrumentation and Methods A Journal Issue: 432 Vol. A
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CEBAF ACCELERATOR
ELECTRONS
LASERS
PARTICLE INTERACTIONS
SCINTILLATION COUNTERS
SPECTROMETER
SPECTROMETERS
TIME RESOLUTION