Prototype Tests on a 200-W Forced Convection Liquid Hydrogen/Deuterium Target
A forced convection target system is being developed for use at the Clinton P. Anderson Meson Physics Facility (LAMPF) which will produce neutrons by bombarding liquid deuterium with a proton beam via the process p + d → n + 2p. Incident energies will vary in the range from 300 to 800 MeV. This neutron source is favorable from two points of view: (1) At an angle of 0°, the emitted neutrons have a small energy spread and good separation from lower-energy neutrons associated with meson production, and (2) at an angle near 26°, the neutrons are emitted with a spin polarization averaging 30% and with a degraded but usable energy spectrum. To obtain an 800-MeV neutron flux of 107/cm2-sec at 8 m from the source will require an 84-μA proton beam passing through 15 cm of liquid deuterium, which implies 500 W dissipation in the deuterium. This value of beam dissipation has been used as a design goal in the preliminary planning. For various reasons this dissipation value has now been reduced and a 150-W beam dissipation capability at negligible density variation is the present goal.
KeywordsClay Graphite Convection Total Heat Torque
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