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Title: The suppression effect of a periodic surface with semicircular grooves on the high power microwave long pill-box window multipactor phenomenon

To improve the transmitting power in an S-band klystron, a long pill-box window that has a disk with grooves with a semicircular cross section is theoretically investigated and simulated. A Monte-Carlo algorithm is used to track the secondary electron trajectories and analyze the multipactor scenario in the long pill-box window and on the grooved surface. Extending the height of the long-box window can decrease the normal electric field on the surface of the window disk, but the single surface multipactor still exists. It is confirmed that the window disk with periodic semicircular grooves can explicitly suppress the multipactor and predominantly depresses the local field enhancement and the bottom continuous multipactor. The difference between semicircular and sharp boundary grooves is clarified numerically and analytically.
Authors:
; ; ; ;  [1]
  1. Institute of Electronics, Chinese Academy of Sciences, Peking, 100190 China (China)
Publication Date:
OSTI Identifier:
22303611
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CROSS SECTIONS; ELECTRIC FIELDS; ELECTRONS; KLYSTRONS; MICROWAVE RADIATION; MONTE CARLO METHOD; PARTICLE TRACKS; PERIODICITY; SIMULATION; SURFACES; TRAJECTORIES