Intense neutron source target test facility: a 200 mA dc, deuterium ion accelerator

Conference · Sun Jan 01 04:00:00 EST 1978

OSTI ID:6331037

Bacon, F M; Riedel, A A

A 200 kV, 200 mA dc, deuterium ion accelerator has been constructed to evaluate high-temperature hydride materials such as scandium and erbium for use as targets in D--T neutron generators. The metal hydride film is deposited on a water-cooled, copper substrate designed to handle power densities of 40 MW/m/sup 2/ while maintaining a surface temperature of less than or equal to 450/sup 0/C. The goal of this program is to develop a target for a D--T neutron generator capable of producing 10/sup 13/ neutrons/s for use in cancer therapy. The accelerator employs a small duopigatron ion source which is capable of delivering a 200 mA deuterium ion beam that is composed of 60% atomic ions. The ion source is held at positive high voltage and a beam is formed with a single stage accel gap. An extractor electrode is biased negative about 2 kV to suppress secondary electrons and to define the point along the beam axis where the beam is space-charge neutralized by the trapped secondary electrons. The distance from the plasma expansion cup to the target is 0.6 m. Ion beam diameters at the target have been determined from measured infrared radiance profiles of the target due to beam heating. Data are presented on ion beam diameters for several operating conditions and accelerator geometries. D--D neutron output rates of 6 x 10/sup 10/ neutrons/s have been measured with a 200 kV, 180 mA beam on erbium and a 180 kV, 160 mA beam on scandium.

• Research Organization: Sandia Labs., Albuquerque, NM (USA)
• DOE Contract Number: EY-76-C-04-0789
• OSTI ID: 6331037
• Report Number(s): SAND-78-2122C; CONF-781113-22
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430100* -- Particle Accelerators-- Design
Development
& Operation
ACCELERATORS
BEAM CURRENTS
BEAM OPTICS
CHARGED PARTICLES
COCKCROFT-WALTON ACCELERATORS
CURRENTS
DEUTERIUM IONS
ELECTROSTATIC ACCELERATORS
ENERGY RANGE
ERBIUM COMPOUNDS
ERBIUM HYDRIDES
HYDRIDES
HYDROGEN COMPOUNDS
IONS
KEV RANGE
KEV RANGE 100-1000
MATERIALS TESTING
MILLI AMP BEAM CURRENTS
NEUTRON SOURCE FACILITIES
PERFORMANCE
RARE EARTH COMPOUNDS
SCANDIUM COMPOUNDS
SCANDIUM HYDRIDES
TARGETS
TESTING
TRANSITION ELEMENT COMPOUNDS