Bulletin of the American Physical Society
54th Annual Meeting of the APS Division of Plasma Physics
Volume 57, Number 12
Monday–Friday, October 29–November 2 2012; Providence, Rhode Island
Session CI2: Beams and Coherent Radiation
2:00 PM–5:00 PM,
Monday, October 29, 2012
Room: Ballroom DE
Chair: Eric Esarey, Lawrence Berkeley National Laboratory
Abstract ID: BAPS.2012.DPP.CI2.1
Abstract: CI2.00001 : Ping-Pong Modes and Higher-Periodicity Multipactor*
2:00 PM–2:30 PM
Preview Abstract Abstract
(IREAP, University of Maryland)
Multipactor is a vacuum discharge based on secondary electron emission. Multiple period multipactors have long been known to exist but have been studied less extensively. In a period-n multipactor, electrons undergo multiple impacts in one rf period, with the synchronous phase alternating periodically between multiple values. A novel resonant form is proposed that combines one- and two-surface impacts within a single period, provided the total transit time is an odd number of rf half-periods, and the product of secondary yields exceeds unity. For low fD products, the simplest such mode is shown to significantly increase the upper electric field boundary of the multipacting region, and lead to overlap of higher-order bands. The results agree nicely with 3-D particle-in-cell code simulations. Practical implications of the findings are discussed, including consequences for multipactor suppression strategies using a DC magnetic field.
*Supported by the US Dept. of Energy, Office of Science, High Energy Physics.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2012.DPP.CI2.1
The American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics.
1 Physics Ellipse, College Park, MD 20740-3844
Editorial Office 1 Research Road, Ridge, NY 11961-2701 (631) 591-4000
Office of Public Affairs 529 14th St NW, Suite 1050, Washington, D.C. 20045-2001 (202) 662-8700