Measurement of low-energy antiproton detection efficiency in BESS below 1 GeV
Authors:
Y. Asaoka,
K. Yoshimura,
T. Yoshida,
K. Abe,
K. Anraku,
M. Fujikawa,
H. Fuke,
S. Haino,
K. Izumi,
T. Maeno,
Y. Makida,
N. Matsui,
H. Matsumoto,
H. Matsunaga,
M. Motoki,
M. Nozaki,
S. Orito,
T. Sanuki,
M. Sasaki,
Y. Shikaze,
T. Sonoda,
J. Suzuki,
K. Tanaka,
Y. Toki,
A. Yamamoto
Abstract:
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…
▽ More
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 $\pm$5%, compared with the previous estimation of $\pm$15% which was the dominant uncertainty for measurements of cosmic-ray antiproton flux.
△ Less
Submitted 23 September, 2002; v1 submitted 1 May, 2001;
originally announced May 2001.