Author/Authors :
Beckford، نويسنده , , B. and De la Puente، نويسنده , , A. and Fujii، نويسنده , , Y. and Hashimoto، نويسنده , , O. and Kaneta، نويسنده , , M. and Kanda، نويسنده , , H. and Maeda، نويسنده , , K. and Matsumura، نويسنده , , A. and Nakamura، نويسنده , , S.N and Perez-Mendez، نويسنده , , N. and Reinhold، نويسنده , , J. and Tang، نويسنده , , L. and Tsukada، نويسنده , , K.، نويسنده ,
Abstract :
The collection efficiency for Cherenkov light incident on a wavelength shifting plate (WLS) has been determined during a beam test at the Proton Synchrotron facility located in the National Laboratory for High Energy Physics (KEK), Tsukuba, Japan. The experiment was conducted in order to determine the detectorʹs response to photoelectrons converted from photons produced by a fused silica radiator; this allows for an approximation of the detectorʹs quality. The yield of the photoelectrons produced through internally generated Cherenkov light as well as light incident from the radiator was measured as a function of the momentum of the incident hadron beam. The yield is proportional to sin 2 θ c , where θ c is the opening angle of the Cherenkov light created. Based on estimations and results from similar conducted tests, where the collection efficiency was roughly 39%, the experimental result was expected to be around 40% for internally produced light from the WLS. The results of the experiment determined the photon collection response efficiency of the WLS to be roughly 62% for photons created in a fused silica radiator and 41% for light created in the WLS.
