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Title: Collimator application for microchannel plate image intensifier resolution improvement

A collimator is included in a microchannel plate image intensifier (MCPI). Collimators can be useful in improving resolution of MCPIs by eliminating the scattered electron problem and by limiting the transverse energy of electrons reaching the screen. Due to its optical absorption, a collimator will also increase the extinction ratio of an intensifier by approximately an order of magnitude. Additionally, the smooth surface of the collimator will permit a higher focusing field to be employed in the MCP-to-collimator region than is currently permitted in the MCP-to-screen region by the relatively rough and fragile aluminum layer covering the screen. Coating the MCP and collimator surfaces with aluminum oxide appears to permit additional significant increases in the field strength, resulting in better resolution.
Inventors:
 [1]
  1. (Livermore, CA)
Issue Date:
OSTI Identifier:
870320
Assignee:
Regents of University of California (Oakland, CA) LLNL
Patent Number(s):
US 5495141
Application Number:
08/196,405
Contract Number:
W-7405-ENG-48
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
collimator; application; microchannel; plate; image; intensifier; resolution; improvement; included; mcpi; collimators; useful; improving; mcpis; eliminating; scattered; electron; limiting; transverse; energy; electrons; reaching; screen; due; optical; absorption; increase; extinction; ratio; approximately; magnitude; additionally; smooth; surface; permit; focusing; field; employed; mcp-to-collimator; region; currently; permitted; mcp-to-screen; relatively; fragile; aluminum; layer; covering; coating; mcp; surfaces; oxide; appears; additional; significant; increases; strength; resulting; channel plate; significant increase; aluminum layer; image intensifier; transverse energy; optical absorption; smooth surface; aluminum oxide; field strength; microchannel plate; plate image; /313/

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