Scintillating-fiber imaging detector for 14-MeV neutrons

Conference · Mon Jul 25 00:00:00 EDT 1994

OSTI ID:10181539

Ress, D; Lerche, R A; Ellis, R J; Heaton, G W; Nelson, M B; Mant, G ^[1]; Lehr, D E ^[2]

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1. Lawrence Livermore National Lab., CA (United States)
2. Stanford Univ., CA (United States). Physics Dept.

The authors have created a detector to image the neutrons emitted by imploded inertial-confinement fusion targets. The 14-MeV neutrons, which are produced by deuterium-tritium fusion events in the target, pass through an aperture to create an image on the detector. The neutron radiation is converted to blue light (430 nm) with a 20-cm-square array of plastic scintillating fibers. Each fiber is 10-cm long with a 1-mm-square cross section; approximately 35-thousand fibers make up the array. The resulting blue-light image is reduced and amplified by a sequence of fiber-optic tapers and image intensifiers, then acquired by a CCD camera. The fiber-optic readout system was tested optically for overall throughput the resolution. The authors plan to characterize the scintillator array reusing an ion-beam neutron source as well as DT-fusion neutrons emitted by inertial confinement targets. Characterization experiments will measure the light-production efficiency, spatial resolution, and neutron scattering within the detector. Several neutron images of laser-fusion targets have been obtained with the detector. Several neutron images of laser-fusion targets have been obtained with the detector. They describe the detector and their characterization methods, present characterization results, and give examples of the neutron images.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 10181539
• Report Number(s): UCRL-JC-115596; CONF-940723-24; ON: DE94018593; TRN: 94:018939
• Resource Relation: Conference: Annual meeting of the Society of Photo-Optical Instrumentation Engineers,San Diego, CA (United States),24-29 Jul 1994; Other Information: PBD: 25 Jul 1994
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
NEUTRON DETECTORS
DESIGN
PLASMA DIAGNOSTICS
NOVA FACILITY
INERTIAL CONFINEMENT
PLASTIC SCINTILLATORS
CHARGE-COUPLED DEVICES
READOUT SYSTEMS
LASER IMPLOSIONS
FUSION YIELD
ION TEMPERATURE
IMAGE PROCESSING
700320
440101
700411
PLASMA DIAGNOSTIC TECHNIQUES AND INSTRUMENTATION
GENERAL DETECTORS OR MONITORS AND RADIOMETRIC INSTRUMENTS
INERTIAL CONFINEMENT DEVICES