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Improved time response for large area microchannel plate photomultiplier tubes in fusion diagnosticsa)
a)Contributed paper, published as part of the Proceedings of the 20th Topical Conference on High-Temperature Plasma Diagnostics, Atlanta, Georgia, USA, June 2014.
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/content/aip/journal/rsi/85/11/10.1063/1.4886759
2014-07-08
2014-07-23

Abstract

Fusion diagnostics that utilise high speed scintillators often need to capture a large area of light with a high degree of time accuracy. Microchannel plate (MCP) photomultiplier tubes (PMTs) are recognised as the leading device for capturing fast optical signals. However, when manufactured in their traditional proximity focused construction, the time response performance is reduced as the active area increases. This is due to two main factors: the capacitance of a large anode and the difficulty of obtaining small pore MCPs with a large area. Collaboration between Photek and AWE has produced prototype devices that combine the excellent time response of small area MCP-PMTs with a large active area by replacing the traditional proximity-gap front section with an electro-optically focused photocathode to MCP. We present results from both single and double MCP devices with a 40 mm diameter active area and show simulations for the 100 mm device being built this year.

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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Improved time response for large area microchannel plate photomultiplier tubes in fusion diagnosticsa)
http://aip.metastore.ingenta.com/content/aip/journal/rsi/85/11/10.1063/1.4886759
10.1063/1.4886759
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