The Compact Muon Solenoid Experiment

نویسندگان

  • N. Akchurin
  • S. Ayan
چکیده

Optical transmission characteristics of multi-mode synthetic silica-core bers between 325 nm and 800 nm were studied in situ while irradiated with neutrons. In one case, ber samples were placed near the core of a 10-kWatt reactor; in the other, fast neutrons generated by p(18 MeV) + Be reaction in a cyclotron, irradiated the bers. The neutron uence in both studies totaled 10 15 n=cm 2. Both of these initial studies indicate that in the sensitivity region of bialkiline PMTs, the irradiation induced loss is 1 dB=m. These initial experiments are aimed at establishing a ber testing methodology for assessing the expected degradation of the CMS forward calorimeter at the LHC due to large neutron backgrounds.

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تاریخ انتشار 2007