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Axisymmetric,
Emittance-Compensated Electron Gun--Advanced
Energy Systems, Inc., 27 Industrial Building, Unit E, Medford, NY
11763; 609-430-2125
Dr.
Hans Bluem, Principal Investigator, hans_bluem@mail.aesys.net
Mr.
Alan Todd, Business Official, alan_todd@aesys.mail.net
DOE
Grant No. DE-FG02-01ER83135
Amount:
$99,904
Extremely
bright, affordable, photocathode electron sources are required for future DOE
facilities such as the Next Linear Collider and Next Generation Light Sources.
An electron gun with greater than 1 nC per bunch and less than 1 π
mm-mrad normalized transverse rms emittance would meet this need, but the sub 1
π mm-mrad target remains elusive. Because
axisymmetry has been shown to be important for minimizing emittance growth, this
project will develop an axisymmetric electron gun that optimizes the standard
emittance-compensation technique to break the 1 π emittance barrier.
Phase I will complete the radio frequency design of the emittance-compensated
gun, conduct beam dynamics modeling to refine emittance compensation, and
determine the expected performance of a complete injector system.
A prototype gun will be fabricated and tested in Phase II.
Commercial Applications and Other Benefits as described by awardee: The electron gun should serve as the injector for advanced, high-brightness X-ray sources for both medical and protein crystallography applications. In the medical market the ability of a monochromatic, tunable, x-ray source to deliver much clearer diagnostic images with a much smaller dose fraction would be extremely attractive for such applications as breast cancer screening. In the pharmaceutical and biomedical industries, a compact high-performance protein crystallography unit would find application in the production of “designer drugs” and in the ongoing task of mapping and DNA sequencing the human genome.