摘要
A few thousands multi-pixel photon Counters (MPPC) have been characterized for the T2K 280 m near detector (ND280). For this purpose a test facility has been developed enabling the characterization of 128 MPPC per day. A mean gain value of 5.4 x 10(5) at breakdown voltage (V(break)) + 1 V with a dispersion of 2.6% has been measured at 20 degrees C. It is shown that the accuracy of the test facility for the gain measurement is at the level of 0.76%. At 20 degrees C the dark noise rates (DNR) have been measured in a range from similar to 400 up to similar to 730 kHz at V(break) + 1.6 V.
- 出版日期2010-1-21