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10-MW, W-Band Radio Frequency Source for a High Gradient Linear Accelerator--Omega-P, Inc., 345 Whitney Avenue, Suite 100, New Haven, CT 06511; 203-789-1164
Dr. Jay L. Hirshfield, Principal Investigator
Mr. George P. Trahan, Business Official
DOE Grant No. DE-FG02-99ER82847
Amount: $100,000
Efforts are underway within the accelerator community to develop high-gradient accelerating structures operating at 91 GHz (W-Band). However, no high-power radio frequency (rf) sources are currently available to test such structures. This project will develop a 10-MW, W-Band, pulsed source, with a pulse width of one microsecond, that would be suitable for testing advanced W-Band high-gradient accelerating structures. The development of the W-Band source is based on the principle of harmonic multiplication, using a 1-MeV, 60 A gyrating electron beam prepared in a cyclotron autoresonance accelerator cavity. The TE-111 mode cavity will be driven with 40 MW pulses from a 55 MW X-Band magnicon. Eighth-harmonic power will be generated in a TE-81 mode output waveguide, and coupled out using a quasi-optical system. Preliminary simulations, using an ideal beam, predict 91.4 GHz output power at a level of 131 MW. Phase I will design the 10-MW W-Band source. This will involve detailed theory and simulation studies of the electron gun, the rf circuit, the quasi-optical output structure, and the beam collector
Commercial Applications and Other Benefits as described by the awardee: Applications for a multi-megawatt W-Band source already exist for use in evaluating candidate structures for advanced high-gradient electron accelerators. Success with such evaluations should create demand for numbers of such W-Band sources to drive a W-Band test accelerator, and, ultimately, for thousands of such sources should a full-scale multi-TeV, W-Band electron-positron collider be built.