Lifetime-extended MCP-PMT

Jinno, Takanori; Mori, Takashi; Ohshima, T.; Arita, Yuji; Inami, K.; Ihara, Tsuneo; Nishizawa, H.; Sasaki, Tomohiro

doi:10.1016/j.nima.2010.10.145

Cited by 38 publications

(35 citation statements)

References 13 publications

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“…The lifetime with an almost complete break down of the QE after 305 mC cm 2 is still not sufficient, although a quite reasonable improvements compared to the previous XP85012 model was obtained (figure 4). Recent developments of both Hamamatsu [10] and Photonis seem promising in achieving higher lifetimes in the order of several C cm 2 . Further measurements of lifetime extended MCP-PMTs of both companies will be performed soon.…”

Section: Discussionmentioning

confidence: 99%

Lifetime-issues of MCP-PMTs

Britting¹,

Eyrich²,

Lehmann³

et al. 2011

J. Inst.

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Cherenkov detectors of the DIRC principle will be used at the PANDA experiment at FAIR. Attractive photo sensor candidates for these devices are micro-channel plate (MCP) photomultipliers (PMT). The reasons are their excellent time resolution and their usability inside magnetic fields, although their lifetime is problematic. Various types were investigated. This paper will concentrate on the performance of the Photonis XP85112 and especially its lifetime behavior. For this MCP-PMT a time resolution of 33ps (σ ) was measured and it is stable up to photon rates of about 2 MHz cm 2 . The peak quantum efficiency (QE) was determined to 24%. Before the actual lifetime measurement several studies were performed, such as scanning the surface of the detector to get the geometrical detector response function. Additionally the gain and time resolution were investigated in a magnetic field up to 2T. Afterwards the lifetime measurements were done up to an integrated charge of 305 mC cm 2 , i.e. the collected charge was 1 − 5 mC cm 2 per day. The gain and QE were determined in irregular intervals of 1-3 days. Also QE scans as a function of the position at the photo cathode were done every 2-3 weeks.

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Section: Discussionmentioning

confidence: 99%

Lifetime-issues of MCP-PMTs

Britting¹,

Eyrich²,

Lehmann³

et al. 2011

J. Inst.

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“…The ALD-MCP-PMT has a longer lifetime than the conventional one because the ALD layer prevents outgassing, which is known to be the source of the QE degradation [9], caused by the secondary electrons impinging on the MCP substrate.…”

Section: Specification Of the Mcp-pmtmentioning

confidence: 99%

Performance of the MCP-PMT for the Belle II TOP counter

Matsuoka¹,

Hirose²,

Iijima³

et al. 2016

Proceedings of International Conference on New Photo-Detectors — PoS(PhotoDet2015)

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A square-shaped micro-channel-plate photomultiplier tube (MCP-PMT) was developed for the Belle II time-of-propagation (TOP) counter. Because the TOP counter uses 512 MCP-PMTs in total, mass production of the MCP-PMTs was conducted and their performance was measured systematically. The following results are presented in this paper: the gain, the transit time spread (TTS), the relative collection efficiency and the quantum efficiency (QE). The mass production was successful as the TTS of all the MCP-PMTs was about 30 ps and the average QE at a 360 nm wavelength was greater than 28%. Degradation of the QE depending on the integrated output charge is a major issue of the MCP-PMT. Study on lifetime extension of the MCP-PMT with atomic layer deposition (ALD) coating is also presented; the lifetime of all the eleven samples with three additional production processes for lifetime extension was measured to be longer than 8.6 C/cm 2 , or the average lifetime of the normal ALD-MCP-PMTs.

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“…The preferred solution was found by placing the film between the first and second MCP. In addition to the film, a ceramic insulator was implemented to seal the anode region of the tube with respect to the cathode region [71]. This followed the speculation that neutral molecular gas molecules are desorbed during the multiplication process in the MCP.…”

Section: Recent Developmentsmentioning

confidence: 99%

“…Relative quantum efficiency at 400 nm as a function of the integrated output charge density for MCP-PMTs developed by the Belle-II Collaboration[71].…”

mentioning

confidence: 99%

Micro-channel plates and vacuum detectors

Gys

2015

Nuclear Instruments and Methods in Physics Research Section A:

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a b s t r a c tA micro-channel plate is an array of miniature electron multipliers that are each acting as a continuous dynode chain. The compact channel structure results in high spatial and time resolutions and robustness to magnetic fields. Micro-channel plates have been originally developed for night vision applications and integrated as an amplification element in image intensifiers. These devices show single-photon sensitivity with very low noise and have been used as such for scintillating fiber tracker readout in high-energy physics experiments. Given their very short transit time spread, micro-channel plate photomultiplier tubes are also being used in time-of-flight and particle identification detectors. The present paper will cover the history of the micro-channel plate development, basic features, and some of their applications. Emphasis will be put on various new manufacturing processes that have been developed over the last few years, and that result in a significant improvement in terms of efficiency, noise, and lifetime performance.

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Lifetime-extended MCP-PMT

Cited by 38 publications

References 13 publications

Lifetime-issues of MCP-PMTs

Lifetime-issues of MCP-PMTs

Performance of the MCP-PMT for the Belle II TOP counter

Micro-channel plates and vacuum detectors

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