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Title: Sub 100 psec x-ray gating cameras for ICF Imaging applications

In this paper we report on several of the technical advances made at LLNL in the gating of MCP x-ray detectors over the past two years, and show typical results obtained from implosions. The essential features of a gated microchannelplate (MCP) detector are discussed in this paper. A pulsed voltage (typically 1 kV, 100 psec) is applied across a MCP. The voltage is applied by gold conducting layers on the MCP, which form a microstrip line with the glass of the MCP. The voltage is applied by gold conducting layers on the MCP, which form a microstrip line with the glass of the MCP being the dielectric. While the voltage is applied the photo electrons resulting from x-ray photons incident on the coated surface of the MCP are amplified with typically 10{sup 3} gain. Because the gain is non-linear with the applied voltage, (subject to consideration on the electron transit line in the MCP, Section IV) there can be narrowing of the optical'' gate with respect to the electrical gate. This relaxes the pulse voltage requirement for the MCP, to FWHM {approximately}100 psec, and voltages of typically 1 kV into typically 25W. In Section II we discuss the novel approachmore » we use for the generation of the electrical pulses required for the gated MCP cameras. The spatial resolution and the factors affecting it are described in Section III. We discuss the temporal resolution of the MCP detectors in Section IV, and in Section V we discuss the configuration of microstrip coating on MCP detectors we have used and some typical results from laser driven implosions. Off line tests showing ultra font gating are described in Section VI.« less
Authors:
; ; ; ; ; ; ; ; ;  [1]
  1. (Rochester Univ., NY (USA). Lab. for Laser Energetics)
Publication Date:
OSTI Identifier:
5816518
Report Number(s):
UCRL-JC-106065; CONF-9009248--6
ON: DE91011202
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: 19. international congress on high speed photography and photonics, Cambridge (UK), 16-22 Sep 1990
Research Org:
Lawrence Livermore National Lab., CA (USA)
Sponsoring Org:
DOE; USDOE, Washington, DC (USA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; LASER IMPLOSIONS; X-RAY DETECTION; CAMERAS; CHARGE-COUPLED DEVICES; ICF DEVICES; LASER TARGETS; SPATIAL RESOLUTION; DETECTION; IMPLOSIONS; RADIATION DETECTION; RESOLUTION; SEMICONDUCTOR DEVICES; TARGETS; THERMONUCLEAR DEVICES 700208* -- Fusion Power Plant Technology-- Inertial Confinement Technology