Abstract
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.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
