Title of article :
Characterization of the QUartz Photon Intensifying Detector (QUPID) for noble liquid detectors
Author/Authors :
Teymourian، نويسنده , , A. and Aharoni، نويسنده , , D. and Baudis، نويسنده , , L. and Beltrame، نويسنده , , P. and Brown، نويسنده , , E. and Cline، نويسنده , , D. and Ferella، نويسنده , , A.D. and Fukasawa، نويسنده , , A. and Lam، نويسنده , , C.W. and Lim، نويسنده , , T. and Lung، نويسنده , , K. and Meng، نويسنده , , Y. and Muramatsu، نويسنده , , S. and Pantic، نويسنده , , E. and Suyama، نويسنده , , M. and Wang، نويسنده , , H. and Arisaka، نويسنده , , K.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2011
Pages :
12
From page :
184
To page :
195
Abstract :
Dark matter and double beta decay experiments require extremely low radioactivity within the detector materials. For this purpose, the University of California, Los Angeles and Hamamatsu Photonics have developed the QUartz Photon Intensifying Detector (Qupid), an ultra-low background photodetector based on the Hybrid Avalanche Photo Diode (HAPD) and entirely made of ultraclean synthetic fused silica. In this work we present the basic concept of the Qupid and the testing measurements on Qupids from the first production line. ing of radioactivity at the Gator facility in the Laboratori Nazionali del Gran Sasso has shown that the Qupids safely fulfill the low radioactive contamination requirements for the next generation zero background experiments set by Monte Carlo simulations. antum efficiency of the Qupid at room temperature is > 30 % at the xenon scintillation wavelength. At −100 °C, the Qupid shows a leakage current smaller than 1 nA and a global gain of 105. In these conditions, the photocathode and the anode show > 95 % linearity up to 1 μ A for the cathode and 3 mA for the anode. The photocathode and collection efficiency are uniform to 80% over the entire surface. In parallel with single photon counting capabilities, the Qupids have a good timing response: 1.8 ±0.1 ns rise time, 2.5 ±0.2 ns fall time, 4.20 ±0.05 ns (FWHM) pulse width, and 160 ±30 ps (FWHM) transit time spread. pids have also been tested in a liquid xenon environment, and scintillation light from 57Co and 210Po radioactive sources was observed.
Keywords :
Photomultiplier tubes , Double beta decay , Qupid , Liquid xenon , Dark matter
Journal title :
Nuclear Instruments and Methods in Physics Research Section A
Serial Year :
2011
Journal title :
Nuclear Instruments and Methods in Physics Research Section A
Record number :
2204914
Link To Document :
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