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T: Teilchenphysik

T 206: Detektoren II

T 206.6: Talk

Tuesday, March 11, 2003, 15:15–15:30, SFO10

Development of a novel wavelength shifter for Cherenkov photon detection in IceCube — •Elisa Resconi — MPIK-Hd, Saupfercheckweg 1, 69117 Heidelberg

The under-ice neutrino telescope AMANDA and the future IceCube reveal high energy neutrinos via the detection of the Cherenkov light produced by the neutrino induced secondary particles. The spectral sensitivity in the UV region of the optical modules (OMs) is limited by the transmission properties of the window material of the photo-multiplier housing. The sensitivity of the OM, as well as the detector performance, can be enhanced via the use of a wavelength shifter (WLS). An UV transparent fluorpolymer doped with a dye is being developed as a WLS. The WLS film can be placed outside the OM, thus shifting the Cherenkov light above the cutoff wavelength of the encapsulating material. An overall gain in light collection up to about 50% can be achieved. The status of the development will be reported in this presentation.