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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 16 — Jun. 1, 2010
  • pp: 2985–2993

High-resolution imaging detector using five microchannel plates and a resistive anode encoder

Go Murakami, Kazuo Yoshioka, and Ichiro Yoshikawa  »View Author Affiliations

Applied Optics, Vol. 49, Issue 16, pp. 2985-2993 (2010)

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We have developed a high-resolution imaging detector with five microchannel plates (MCPs) in a set of V and Z stacks and a resistive anode encoder (RAE) for future space applications. In a position-sensitive system with a RAE, the spatial resolution depends on the signal-to-noise ratios at the anode terminals. Therefore, a high and stable electron gain of MCPs allows the position determination of each photo electron event with a high spatial resolution. We investigated the effect of the potentials applied to the detector on the pulse height distribution (PHD) and the spatial resolution by means of calculations and experiments. The calculations showed that the negative interstack potential reduced the size of the electron cloud at the Z-stack input by 80 % . The result suggests that, under such a condition, the Z-stack MCP is operated in the completely saturated mode and exhibits a narrow PHD. On the other hand, in the measurements, applying the negative interstack potential reduced the width of the PHD by 60 % . As a result, the spatial resolution of 45 μm , corresponding to 480 × 480 pixels, was achieved. The results enable us to optimize and apply the technique to future missions.

© 2010 Optical Society of America

OCIS Codes
(040.5250) Detectors : Photomultipliers
(040.7190) Detectors : Ultraviolet
(040.7480) Detectors : X-rays, soft x-rays, extreme ultraviolet (EUV)
(110.2970) Imaging systems : Image detection systems

ToC Category:

Original Manuscript: December 1, 2009
Revised Manuscript: April 20, 2010
Manuscript Accepted: April 26, 2010
Published: May 20, 2010

Go Murakami, Kazuo Yoshioka, and Ichiro Yoshikawa, "High-resolution imaging detector using five microchannel plates and a resistive anode encoder," Appl. Opt. 49, 2985-2993 (2010)

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