International Topical Meeting on Nuclear Research Applications and Utilization of Accelerators
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AP/IE-01
Long-Lifetime High-Yield Neutron Generators Using the D–D Reaction M.K. Fuller Adelphi Technology, Inc., Redwood City, California, United States of America Corresponding Author: michael.fuller@adelphitech.com The Lawrence Berkeley National Laboratory and Adelphi Technology Inc. have developed a series of high-yield neutron generators using the D–D reaction with an axial geometry. They operate with a single ion beam and can have a small source size useful for fast neutron radiography. The generator uses RF induction discharge to efficiently ionize the deuterium gas. This discharge method provides high plasma density for high output current, high atomic species from molecular gases, long life operation and versatility for various discharge chamber geometries. These generators are open systems that can be actively pumped for a continuous supply of deuterium gas further increasing the generator’s expected lifetime. Since the system is open, many of the components, including the target, can be easily replaced. Maximum measured peak yield from one of the generators is 2 x109 n/s and higher yields are expected to 1010 n/s. Pulsed and continuous operation has been demonstrated. Several of the generators have been enclosed in moderators and shielded for both neutrons and x-rays. In this mode of operation these generators have been used for Prompt Gamma Neutron Activation Analysis (PGNAA) and Neutron Activation Analysis (NAA). Fast neutron radiography has also been demonstrated using a newly developed camera. |
