Measurement of low-energy antiproton detection efficiency in BESS below 1 GeV

被引：12

作者：

Asaoka, Y

Yoshimura, K

Yoshida, T

Abe, K

Anraku, K

Fujikawa, M

Fuke, H

Haino, S

Izumi, K

Maeno, T

Makida, Y

Matsui, A

Matsumoto, H

Matsunaga, H

Motoki, M

Nozaki, M

Orito, S

Sanuki, T

Sasaki, M

Shikaze, Y

Sonoda, T

Suzuki, J

Tanaka, K

Toki, Y

Yamamoto, A

机构：

[1] Univ Tokyo, Dept Phys, Sch Sci, Bunkyo Ku 2, Tokyo 1130033, Japan

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

[3] Kobe Univ, Nada Ku, Kobe, Hyogo 6578501, Japan

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2002年 / 489卷 / 1-3期

基金：

日本学术振兴会;

关键词：

BESS; systematic error; antiproton detection efficiency; KEK PS; detector simulation; GEANT GHEISHA;

D O I：

10.1016/S0168-9002(02)00804-5

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

An accelerator experiment was performed using a low-energy antiproton beam to measure antiproton detection efficiency of BESS, a balloon-borne spectrometer with a superconducting solenoid. Measured efficiencies showed good agreement with calculated ones derived from the BESS Monte Carlo simulation based on GEANT/GHEISHA. With detailed verification of the BESS simulation, the relative systematic error of detection efficiency derived from the BESS simulation has been determined to be +/-5%, compared with the previous estimation of +/- 15% which was the dominant uncertainty for measurements of cosmic-ray antiproton flux. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：170 / 177

页数：8

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