Linearized Wigglers for Damping Rings

Award Information
Agency: Department of Energy
Branch: N/A
Contract: DE-FG02-04ER84081
Agency Tracking Number: 75779S04-I
Amount: $56,860.00
Phase: Phase I
Program: SBIR
Awards Year: 2004
Solicitation Year: 2004
Solicitation Topic Code: 7
Solicitation Number: DOE/SC-0075
Small Business Information
Sti Optronics, Inc.
2755 Northup Way, Bellevue, WA, 98004
HUBZone Owned: Y
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Stephen Gottschalk
 (425) 827-0460
Business Contact
 William Thayer, III
Title: Dr.
Phone: (425) 827-0460
Research Institution
75779-Both U.S. and European scientists are evaluating the use of permanent magnet wigglers in the damping rings of linear colliders to reduce vertical emittance. These wigglers pose unique analysis, design, and engineering challenges. The first challenge is to control the nonlinear dynamics caused by the magnetic field transverse roll-off, which can disrupt beam quality and damage the wiggler. The second challenge is build-up of an electron cloud, which can reduce equilibrium emittance and impose an upper limit on the current. Phase I will design a ¿linearized¿ wiggler with greatly reduced transverse roll-off and nonlinear field effects. Two approaches will be individually analyzed using magnetic field analysis software, guided by previous experience with controlling transverse roll-off and higher-order fields. The approaches will be then evaluated together as an integrated system. Phase II will perform design verification tests on a half-period prototype to validate the Phase I approach. Also, a database will be established as a guide for end users of these wigglers. Commercial Applications and Other Benefits as described by the awardee: Besides addressing the problem of transverse roll-off and nonlinear field effects in colliders, the linearized wiggler also should be less expensive to build. The reduced cost should directly benefit other wiggler applications, such as in synchrotron storage rings, industrial processing, medicine, and academia.

* information listed above is at the time of submission.

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