Dynamical aspects of multipacting induced discharge in a rectangular waveguide.

Geng, R. L. and Goudket, P. and Carter, Richard G. and Belomestnykh, S. and Padamsee, H. and Dykes, D. M. (2005) Dynamical aspects of multipacting induced discharge in a rectangular waveguide. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 538 (1-3). pp. 189-205. ISSN 0168-9002

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Abstract

Multipacting induced discharge in a rectangular waveguide is studied experimentally at a RF frequency of 500 MHz. The waveguide has a cross-section of 457 mm by 102 mm. The maximum forward RF power is 600 and 300 kW in traveling and standing wave mode, respectively. A continuous multipacting band structure is observed. Electron pick-up probes of antenna-type are used to measure the multipacting current and its longitudinal as well as horizontal distributions. The electron energy spectrum is measured with the retarding field method. The end-point energy of the spectra taken in traveling wave mode is in the range of 100-1000eV and agrees well with the impact energy calculated by the classical multipacting theory. However, a large fraction of electrons has energies lower than 100eV. Electron stimulated gas desorption is found to play a critical role in the dynamics of multipacting induced breakdown. It is concluded that the ionization discharge of desorbed gases is the immediate cause for RF breakdown. (C) 2004 Elsevier B.V. All rights reserved.

Item Type:
Journal Article
Journal or Publication Title:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3105
Subjects:
?? instrumentationnuclear and high energy physicstk electrical engineering. electronics nuclear engineering ??
ID Code:
26810
Deposited By:
Deposited On:
27 Jul 2009 09:59
Refereed?:
Yes
Published?:
Published
Last Modified:
15 Jul 2024 10:30