The CLAS12 Forward Time-of-Flight system

被引：7

作者：

Carman, D. S. ^{[1
]}

Clark, L. ^{[2
]}

De Vita, R. ^{[3
]}

Fedotov, G. ^{[4
,5
]}

Gothe, R. W. ^{[4
]}

Hollis, G. ^{[4
]}

Miller, B. ^{[1
]}

Phelps, E. ^{[4
]}

Tian, Y. ^{[4
]}

Trivedi, A. ^{[4
]}

Wiggins, C. ^{[1
]}

机构：

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

[2] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland

[3] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy

[4] Univ South Carolina, Columbia, SC 29208 USA

[5] Natl Res Ctr Kurchatov Inst, Gatchina 188300, Russia

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2020年 / 960卷

基金：

美国国家科学基金会;

关键词：

CLAS12; Time of flight; Plastic scintillator; Particle identification;

D O I：

10.1016/j.nima.2020.163629

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The Forward Time-of-Flight system for the large-acceptance CLAS12 spectrometer in Hall B at the Thomas Jefferson National Accelerator Facility is described. The system is positioned at distances in the range from 6.2 m to 7.2 m from the beam-target interaction point and spans laboratory polar angles from 5 degrees -> 45 degrees and nearly the full azimuth. The system consists of 540 individual scintillation counters with double-ended readout that range in length from 17 cm to 426 cm of discrete widths of 6 cm, 15 cm, and 22 cm, and of discrete thicknesses of 5 cm and 6 cm. The effective counter time resolution for passing charged particles varies from 50 ps for the shortest counters at small angles to 200 ps for the longest counters at large angles. The detectors are part of the forward-angle particle identification system for CLAS12 during offline event reconstruction and are a component of the online data acquisition trigger to select final state event topologies with forward-going charged particles.

引用

页数：18

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