The time-of-flight system for CLAS

被引：111

作者：

Smith, ES

Carstens, T

Distelbrink, J

Eckhause, M

Egiyan, H

Elouadrhiri, L

Ficenec, J

Guidal, M

Hancock, AD

Hersman, FW

Holtrop, M

Jenkins, DA

Kim, W

Loukachine, K

MacArthur, K

Marchand, C

Mecking, B

Mutchler, G

Schutt, D

Smith, LC

Smith, TP

Taylor, S

Tung, TY

Weisenberger, A

Welsh, RE

机构：

[1] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA

[2] Univ New Hampshire, Durham, NH 03824 USA

[3] Coll William & Mary, Williamsburg, VA 23185 USA

[4] Christopher Newport Univ, Newport News, VA 23606 USA

[5] Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA

[6] CEA Saclay, F-91191 Gif Sur Yvette, France

[7] Kyungpook Natl Univ, Taegu 702701, South Korea

[8] Rice Univ, Houston, TX 77251 USA

[9] Univ Virginia, Charlottesville, VA 22901 USA

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1999年 / 432卷 / 2-3期

关键词：

CLAS; time of flight; plastic scintillator; particle identification;

D O I：

10.1016/S0168-9002(99)00484-2

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

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 m(2), 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. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：265 / 298

页数：34

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