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Development of a geometry-compensated neutron time-of-flight detector for ICF applications with approximately 200 ps time response. [Inertial Confinement Fusion (ICF)]

Conference ·
OSTI ID:7046923
Current mode neutron time-of-flight detectors are used on Nova for neutron yield, ion temperature, and neutron emission time measurements. Currently used detectors are limited by the time response of the microchannel plate photomultiplier tubes (MCP-PMTs) used with the scintillators, scintillator decay time, scintillator thickness, and oscilloscope response time. A change in the geometry of the scintillator allows one to take advantage of the increased time resolution made possible by more advanced transient recorders and microchannel plate photomultiplier tubes. A prototype detector has been designed to incorporate these changes, and could potentially yield time resolution of less than 150 ps. Experimental results are presented demonstrating an ion temperature measurement of a direct-drive DT implosion on Nova. 9 refs.
Research Organization:
Lawrence Livermore National Lab., CA (United States)
Sponsoring Organization:
DOE; USDOE, Washington, DC (United States)
DOE Contract Number:
W-7405-ENG-48
OSTI ID:
7046923
Report Number(s):
UCRL-JC-109356; CONF-920362--39; ON: DE92018024
Country of Publication:
United States
Language:
English