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A Drive Beam Micro-Pulse Injector--FM Technologies, Inc., 10529-B Braddock Road, Fairfax, VA 22032-2236; 703-425-5111
Dr. Frederick M. Mako, Principal Investigator
Dr. Frederick M. Mako, Business Official
DOE Grant No. DE-FG02-99ER82792
Amount: $100,000
Many applications in high-energy physics and elsewhere require a source which can produce several thousand high-charge and short-duration electron bunches. Photocathodes, which are typically used, can provide only up to 100 bunches containing tens of nano-coulombs per bunch. Also, they require expensive high-power lasers and complicated timing circuitry. This project will develop a new device, called the Drive Beam Micro-Pulse Injector, based on an existing design that produces electron bunches having 6 nano-coulombs of charge in a pulse train of up to 13 micro-coulombs, a micro-pulse duration of 15-20 ps, a normalized transverse emittance of about 23 mm-milliradians, and a particle energy of 2-3 MeV. Phase I will develop a detailed analysis to further refine the injector concept and determine the key requirements. Preliminary work suggests that the device should be capable of producing high-current densities (much larger than a kA/cm2), and short pulses (1-100 ps) at nominally 2-5% of the radio-frequency period.
Commercial Applications and Other Benefits as described by the awardee: The electron gun should provide a high-charge, low-emittance, picosecond-long electron source suitable for many applications including high-charge, high-energy picosecond electron injectors for accelerators, future linear colliders, medical and industrial radio-frequency linacs, and accelerator test facilities.