ICFA Instrumentation Bulletin, Volume 18, Spring 1999 Issue (SLAC-J-ICFA-018)
- SLAC
Low-refractive index silica aerogel is the most convenient radiator for threshold-type Cherenkov counters, which is used for particle identification in high-energy physics experiments. For the BELLE detector at the KEK B-Factor, they have produced about 2 m{sup 3} hydrophobic silica aerogels of n = 1.01-1.03 using a new production method. The particle identification capability of the aerogel Cherenkov counters was tested, and a 3 {sigma} pion/proton separation has been achieved at 3.5 GeV/c. Radiation hardness of the aerogels was confirmed up to 9.8 Mrad. Thanks to the improved transparency, aerogels prepared by the two-step method can be used as radiators, not only as a threshold-type, but also for ring imaging-type Cherenkov counters. The newly developed aerogels will be used extensively for particle identification devices in future high-energy physics experiments.
- Research Organization:
- Stanford Linear Accelerator Center, Menlo Park, CA (US)
- Sponsoring Organization:
- USDOE Office of Science (US)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 826477
- Report Number(s):
- SLAC-R-649
- Country of Publication:
- United States
- Language:
- English
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