Exploration of Long-Life Polarized Electron Sources

Award Information
Agency: Department of Energy
Branch: N/A
Contract: DE-FG02-04ER83883
Agency Tracking Number: 75592S04-I
Amount: $99,964.00
Phase: Phase I
Program: SBIR
Awards Year: 2004
Solicitation Year: 2004
Solicitation Topic Code: 5
Solicitation Number: DOE/SC-0075
Small Business Information
27 Industrial Boulevard, Unit E, Medford, NY, 11763
DUNS: N/A
HUBZone Owned: Y
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Hans Bluem
 Dr.
 (609) 514-0315
 hans_bluem@mail.aesys.net
Business Contact
 Anthony Favale
Title: Mr.
Phone: (631) 345-6264
Email: tony_favale@mail.aesys.net
Research Institution
N/A
Abstract
75592-A radio frequency (RF) photoemission source that delivers polarized electrons at low emittance would be an attractive electron source for a linear collider. Moreover, if such a source were used in conjunction with nearby injection system optics, a beam with a high ratio of transverse emittances could be delivered, thereby simplifying the linear collider¿s damping system. However, present electron source technology has not developed sufficiently to assure that such a source is feasible. This project will fabricate a long-life, low emittance photocathode source for producing polarized electrons. The development of this source will require a substantial improvement in the vacuum inside an RF source, or in a booster in close proximity to a DC source, as well as an understanding and reduction of the effects of ion back bombardment. Phase I will study three configurations for beam dynamics and ion back bombardment and choose a configuration and operating temperature, so that the source for polarized electrons can be designed and fabricated in Phase II. Commercial Applications and Other Benefits as described by the awardee: All linear collider designs should benefit from long-life, low-emittance polarized sources, which would significantly ease the requirements on the damping rings. As an additional benefit, sources with a solenoid field on the cathode followed by a flat beam transformer could provide large aspect ratio beam emittance.

* Information listed above is at the time of submission. *

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