Time-resolved fast-neutron pinhole camera for studying thermonuclear plasmas
A fast-neutron pinhole camera with high detection efficiency and nanosecond time-resolution has been developed and applied to the investigation of the spatial and temporal distributions of DD- and DT-neutrons produced by thermonuclear plasmas. The pinhole consists of a specially designed 1.15 m long copper collimator with an effective aperture of 1 mm diameter. Several different types of spatial resolution detectors have been used at the image plane: (1) a multi-element, scintillation-photomultiplier system used for time-resolved measurements consisting of sixty-one individual detectors, (2) a scintillation-fiber-chamber coupled to a gated image-intensifier tube used for direct photographing of the neutron image, and (3) a propane bubble chamber used for time-integrated recording with a capability to distinguish DD- from DT-neutrons. Pulsed neutron sources with typical dimensions of 1 cm emitting of the order of 10/sup 12/ neutrons over a time period of 10-100 nsec have been investigated. A spatial resolution of 1 mm and a time resolution of approximately 10 nsec was achieved in the investigations of dense plasma compression phenomena.
- Research Organization:
- California Univ., Livermore (USA). Lawrence Livermore Lab.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 7350335
- Report Number(s):
- UCRL-77527; CONF-760128-1; TRN: 76-015820
- Resource Relation:
- Conference: Conference on diagnostics of high temperature plasmas, Knoxville, TN, USA, 7 Jan 1976
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HOT PLASMA
PLASMA DIAGNOSTICS
SCINTILLATION COUNTERS
PERFORMANCE
CAMERAS
DEUTERIUM
EFFICIENCY
NEUTRONS
RESOLUTION
TRITIUM
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
ELEMENTARY PARTICLES
FERMIONS
HADRONS
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
MEASURING INSTRUMENTS
NUCLEI
NUCLEONS
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PLASMA
RADIATION DETECTORS
RADIOISOTOPES
STABLE ISOTOPES
YEARS LIVING RADIOISOTOPES
700102* - Fusion Energy- Plasma Research- Diagnostics