A novel aerogel Cherenkov detector for DIRAC-II

We present a new threshold Cherenkov detector using silica aerogel radiators with wavelength shifter. A duplex design was chosen to discriminate between kaons and protons in the momentum range 4–8 GeV/c for the DIRAC-II experiment at CERN. The counter consists of overlapping modules with two differe...

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Detalles Bibliográficos
Autores principales: Allkofer, Y, Amsler, C, Horikawa, S, Johnson, I, Regenfus, C, Rochet, J
Lenguaje:eng
Publicado: 2007
Materias:
Detectors and Experimental Techniques
Acceso en línea:https://dx.doi.org/10.1016/j.nima.2007.09.007
http://cds.cern.ch/record/1378849
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author Allkofer, Y
Amsler, C
Horikawa, S
Johnson, I
Regenfus, C
Rochet, J
author_facet Allkofer, Y
Amsler, C
Horikawa, S
Johnson, I
Regenfus, C
Rochet, J
author_sort Allkofer, Y
collection CERN
description We present a new threshold Cherenkov detector using silica aerogel radiators with wavelength shifter. A duplex design was chosen to discriminate between kaons and protons in the momentum range 4–8 GeV/c for the DIRAC-II experiment at CERN. The counter consists of overlapping modules with two different refractive indices, 1.015 and 1.008, covering the low and high momentum regions, respectively. The detector performance was optimized with cosmic rays and Monte-Carlo simulations. Thereby we developed a new design of alternating layers of aerogel tiles and diffusive reflector foils coated with wavelength shifter. The best results were obtained with p-terphenyl giving 50% increase in light yield. A pyramidal shape of the aerogel radiator was also adopted for the best signal uniformity over a large sensitive area.
id cern-1378849
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2007
record_format invenio
spelling cern-13788492021-06-18T13:12:56Zdoi:10.1016/j.nima.2007.09.007http://cds.cern.ch/record/1378849engAllkofer, YAmsler, CHorikawa, SJohnson, IRegenfus, CRochet, JA novel aerogel Cherenkov detector for DIRAC-IIDetectors and Experimental TechniquesWe present a new threshold Cherenkov detector using silica aerogel radiators with wavelength shifter. A duplex design was chosen to discriminate between kaons and protons in the momentum range 4–8 GeV/c for the DIRAC-II experiment at CERN. The counter consists of overlapping modules with two different refractive indices, 1.015 and 1.008, covering the low and high momentum regions, respectively. The detector performance was optimized with cosmic rays and Monte-Carlo simulations. Thereby we developed a new design of alternating layers of aerogel tiles and diffusive reflector foils coated with wavelength shifter. The best results were obtained with p-terphenyl giving 50% increase in light yield. A pyramidal shape of the aerogel radiator was also adopted for the best signal uniformity over a large sensitive area.DIRAC-PUB-2007-01oai:cds.cern.ch:13788492007
spellingShingle Detectors and Experimental Techniques
Allkofer, Y
Amsler, C
Horikawa, S
Johnson, I
Regenfus, C
Rochet, J
A novel aerogel Cherenkov detector for DIRAC-II
title A novel aerogel Cherenkov detector for DIRAC-II
title_full A novel aerogel Cherenkov detector for DIRAC-II
title_fullStr A novel aerogel Cherenkov detector for DIRAC-II
title_full_unstemmed A novel aerogel Cherenkov detector for DIRAC-II
title_short A novel aerogel Cherenkov detector for DIRAC-II
title_sort novel aerogel cherenkov detector for dirac-ii
topic Detectors and Experimental Techniques
url https://dx.doi.org/10.1016/j.nima.2007.09.007
http://cds.cern.ch/record/1378849
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