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Rate effects of standard and high-strip-current microchannel plate image intensifiers

Conference · · Proceedings of SPIE - The International Society for Optical Engineering
DOI:https://doi.org/10.1117/12.50531· OSTI ID:5459427
 [1];  [1];  [2];  [2]
  1. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
  2. EG and G Energy Measurements Group, Goleta, CA (United States). Santa Barbara Operations
The gains of gated microchannel plate image intensifiers (MCPIIs) at high repetition rates (up to 10 kHz) were measured. Comparisons were made between the gain behavior of a standard ITT type F4111 MCPII and similar device incorporating a high strip current microchannel plate. The most notable effect observed for the standard MCPII is a decline in luminous gain with increasing gate repetition rate and with higher input irradiances. The intensifier with the higher strip current microchannel plate (MCP), on the other hand, exhibited little or no reduction in gain for gating frequencies up to 10 kHz under similar test conditions (60 pJ/cm2 input energy density). The charge storage capacity and recharge time of the standard MCPII are most likely the limiting factors in its ability to maintain a constant gain at high repetition rates. The limiting effect of the recharge time on the MCP gain is calculated and compared to the actual measurements.
Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
W-7405-ENG-36; AC08-88NV10617
OSTI ID:
5459427
Report Number(s):
LA-UR--91-2431; CONF-9107115--17; EGG--10617-2107; ON: DE91016196
Conference Information:
Journal Name: Proceedings of SPIE - The International Society for Optical Engineering Journal Volume: 1539
Country of Publication:
United States
Language:
English