dorsal/arxiv
View SchemaA novel type of proximity focusing RICH counter with multiple refractive index aerogel radiator
| Authors | T. Iijima, S. Korpar, I. Adachi, S. Fratina, T. Fukushima, A. Gorisek, H. Kawai, M. Konishi, Y. Kozakai, P. Krizan, T. Matsumoto, Y. Mazuka, S. Nishida, S. Ogawa, S. Ohtake, R. Pestotnik, S. Saitoh, T. Seki, T. Sumiyoshi, Y. Uchida, Y. Unno, S. Yamamoto |
|---|---|
| Categories | |
| ArXiv ID | physics/0504220 |
| URL | https://arxiv.org/abs/physics/0504220 |
| DOI | 10.1016/j.nima.2005.05.030 |
| Journal | Nucl.Instrum.Meth. A548 (2005) 383-390 |
Abstract
A proximity focusing ring imaging Cherenkov detector, with the radiator consisting of two or more aerogel layers of different refractive indices, has been tested in 1-4 GeV/c pion beams at KEK. Essentially, a multiple refractive index aerogel radiator allows for an increase in Cherenkov photon yield on account of the increase in overall radiator thickness, while avoiding the simultaneous degradation in single photon angular resolution associated with the increased uncertainty of the emission point. With the refractive index of consecutive layers suitably increasing in the downstream direction, one may achieve overlapping of the Cherenkov rings from a single charged particle. In the opposite case of decreasing refractive index, one may obtain well separated rings. In the former combination an approximately 40% increase in photon yield is accompanied with just a minor degradation in single photon angular resolution. The impact of this improvement on the pion/kaon separation at the upgraded Belle detector is discussed.
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"abstract": "A proximity focusing ring imaging Cherenkov detector, with the radiator\nconsisting of two or more aerogel layers of different refractive indices, has\nbeen tested in 1-4 GeV/c pion beams at KEK. Essentially, a multiple refractive\nindex aerogel radiator allows for an increase in Cherenkov photon yield on\naccount of the increase in overall radiator thickness, while avoiding the\nsimultaneous degradation in single photon angular resolution associated with\nthe increased uncertainty of the emission point. With the refractive index of\nconsecutive layers suitably increasing in the downstream direction, one may\nachieve overlapping of the Cherenkov rings from a single charged particle. In\nthe opposite case of decreasing refractive index, one may obtain well separated\nrings. In the former combination an approximately 40% increase in photon yield\nis accompanied with just a minor degradation in single photon angular\nresolution. The impact of this improvement on the pion/kaon separation at the\nupgraded Belle detector is discussed.",
"arxiv_id": "physics/0504220",
"authors": [
"T. Iijima",
"S. Korpar",
"I. Adachi",
"S. Fratina",
"T. Fukushima",
"A. Gorisek",
"H. Kawai",
"M. Konishi",
"Y. Kozakai",
"P. Krizan",
"T. Matsumoto",
"Y. Mazuka",
"S. Nishida",
"S. Ogawa",
"S. Ohtake",
"R. Pestotnik",
"S. Saitoh",
"T. Seki",
"T. Sumiyoshi",
"Y. Uchida",
"Y. Unno",
"S. Yamamoto"
],
"categories": [
"physics.ins-det"
],
"doi": "10.1016/j.nima.2005.05.030",
"journal_ref": "Nucl.Instrum.Meth. A548 (2005) 383-390",
"title": "A novel type of proximity focusing RICH counter with multiple refractive index aerogel radiator",
"url": "https://arxiv.org/abs/physics/0504220"
},
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