| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8172573 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2015 | 7 Pages |
Abstract
This study presents the development of hydrophobic silica aerogel for use as a radiator in threshold-type Cherenkov counters. These counters are to be used for separating positrons and positive muons produced by kaon decay in the J-PARC TREK/E36 experiment. We chose to employ aerogel with a refractive index of 1.08 to identify charged particles with momenta of approximately 240Â MeV/c, and the radiator block shape was designed with a trapezoidal cross-section to fit the barrel region surrounding the kaon stopping target in the center of the TREK/E36 detector system. Including spares, we obtained 30 crack-free aerogel blocks segmented into two layers, each layer having a thickness of 2Â cm and a length of 18Â cm, to fill 12 counter modules. Optical measurements showed that the produced aerogel tiles had the required refractive indices and transparency.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
Makoto Tabata, Akihisa Toyoda, Hideyuki Kawai, Youichi Igarashi, Jun Imazato, Suguru Shimizu, Hirohito Yamazaki,