Z-trigger system with the BELLE Central Drift Chamber

被引：4

作者：

Tomoto, M ^{[1
]}

Ohshima, T

Suzuki, S

Sugiyama, A

Yoshida, K

Matsumoto, T

Okabe, T

Ishikawa, A

Inami, K

Nagai, I

Hirose, M

Fujimoto, K

Sugi, A

Akatsu, M

Sakai, Y

Uno, S

Iwasaki, Y

Suzuki, J

Ujiie, N

Fujita, Y

Joo, KK

Nitoh, O

Hirano, H

机构：

[1] Nagoya Univ, Dept Phys, Nagoya, Aichi 4648602, Japan

[2] High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan

[3] Tokyo Univ Agr & Technol, Dept Appl Phys, Koganei, Tokyo 184, Japan

[4] Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2000年 / 447卷 / 03期

关键词：

Cathodes - Cosmic rays - Electrons - Magnetic fields - Superconducting materials - Trigger circuits;

D O I：

10.1016/S0168-9002(99)01075-X

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We describe the design and performance of a fast Z-trigger system with the BELLE Central Drift Chamber. It utilizes z-position Information from the axial/stereo wire hits as well as the cathode strip. This system is essential to reduce the false trigger rate from caused by the spent electrons or positrons interacting with the material around the beam pipe. We tested the performance of the system using cosmic rays in a magnetic field of 1.5 T, provided by a superconducting solenoid. The trigger efficiency was 98% for a single track passing through the interaction region. This trigger was effective in rejecting tracks originating from points more than 10 cm away from the interaction point. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：416 / 423

页数：8

共 7 条

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