| Budget Amount *help |
¥18,330,000 (Direct Cost: ¥14,100,000、Indirect Cost: ¥4,230,000)
Fiscal Year 2011: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2010: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2009: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
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| Research Abstract |
By assembling Micro Pattern Gas Detectors(MPGD) such as GEM and Micromegas, we developed a gaseous photomultipliers which can transform photon signals to electric signals. In the course of this R & D program, one of critical issues was ion-feedback phenomena. During the gas amplification process a lot of ions are created and they are moved to the photocathode guided by the electric field. Then new electrons may be created or photocathode itself may be damaged by this ion bombardment. We proceeded to this R & D program aiming to get high gain while effectively suppressing ion-feedbacks. Finally we have developed a gaseous photomultipliers having a 105 gain and a 10-3 ion-feedback rate, which is close to a practical use.
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