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Microchannel plate, gas proportional counter and imaging device

Foreign code F110005370
File No. K01806WO
Posted date Sep 5, 2011
Country United States of America
Application number 98953706
Gazette No. 20110155919
Gazette No. 8134129
Date of filing Jul 28, 2006
Gazette Date Jun 30, 2011
Gazette Date Mar 13, 2012
International application number JP2006315062
International publication number WO2007013630
Date of international filing Jul 28, 2006
Date of international publication Feb 1, 2007
Priority data
  • P2005-221722 (Jul 29, 2005) JP
  • 2006WO-JP315062 (Jul 28, 2006) WO
Title Microchannel plate, gas proportional counter and imaging device
Abstract (US8134129)
An object of the present invention is to provide a microchannel plate having excellent characteristics which enable to attain both high luminance and high resolution at the same time, a gas proportional counter using such a microchannel plate and an imaging device.
The microchannel plate according to the present invention comprises a base body provided with a plurality of through holes (13) and having an insulating property, and is arranged in a gas atmosphere mainly containing an inert gas to constitute a proportional counter.
The base body has photoelectric converter portions (1a, 1b) formed on at least inner walls of the plurality of through holes (13).
Scope of claims [claim1]
1. A microchannel plate which comprises a base body provided with a plurality of through holes and having an insulating property, wherein the base body has a first photoelectric converter portion formed on at least inner walls of the plurality of through holes on one end side, and a second photoelectric converter portion formed on the inner walls of the plurality of through holes on the other end side and arranged apart from the first photoelectric converter portion, and
the first and second photoelectric converter portions are configured to also serve as electrodes to apply a predetermined voltage to opposite ends of the through holes.
[claim2]
2. The microchannel plate according to claim 1, wherein the first and second photoelectric converter portions include alkali metal atoms.
[claim3]
3. The microchannel plate according to claim 2, wherein the first and second photoelectric converter portions satisfy a relation represented by the following formula (I):
Lcp * 0.1<La (1),
in which Lcp: a length of each through hole in an axial direction, and La: a length of the first and second photoelectric converter portions along the axial direction of the through hole.
[claim4]
4. The microchannel plate according to claim 1, wherein the first and second photoelectric converter portions include a plurality of types of alkali metal atoms.
[claim5]
5. The microchannel plate according to claim 1, wherein sections of the inner walls of the plurality of through holes have a substantially linear shape which is vertical to a plane direction of the base body.
[claim6]
6. A gas proportional counter which comprises: a chamber filled with a gas for radiation detection mainly including an inert gas and having a window which an electromagnetic wave or ionization radiation enters, and
the MCP arranged in the chamber according to claim 1.
[claim7]
7. The gas proportional counter according to claim 6, wherein the gas for radiation detection contains an organic gas including a halogen atom in molecules.
[claim8]
8. An imaging device which comprises: the gas proportional counter according to claim 6, and
a photo-detector arranged after the chamber.
  • Inventor, and Inventor/Applicant
  • TOKANAI FUYUKI
  • SAKURAI TAKAHISA
  • GUNJI SHUICHI
  • SUMIYOSHI TAKAYUKI
  • OKADA TERUYUKI
  • ENDO TETSURO
  • FUJITA YOSHIO
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
IPC(International Patent Classification)
Reference ( R and D project ) PRESTO Information and Cell Function AREA
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