2011 Fiscal Year Final Research Report
Research and development of gaseous photomultiplier tubes for practical use
| Project/Area Number |
21340064
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Tokyo Metropolitan University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
TOKANAI Fuyuki 山形大学, 理学部, 准教授 (80323161)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 素粒子実験 / 光検出器 / ガス増幅 / MPGD |
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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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