Experimental Studies on Grooved Surfaces to Suppress Secondary Electron Emission

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Grooved surfaces are effective to suppress the secondary electron emission, and can be a promising technique to mitigate the electron cloud effect in positron/proton storage rings. Aiming for the application in a dipole-type magnetic field, various shapes of triangular grooved surfaces have been studied at KEK. The grooves tested here have vertex angles of 20-30{sup o}, depths of 2.5-5.0 mm, and vertex roundness of 0.05-0.2 mm. In a laboratory, the secondary electron yields (SEY) of small test pieces were measured using an electron beam in a magnetic-free condition. The grooved surfaces clearly had low SEY compared to flat surfaces of ... continued below

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3 pages

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Suetsugu, Y.; Fukuma, H.; Shibata, K.; /KEK, Tsukuba; Pivi, M.; Wang, L. et al. June 15, 2010.

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Description

Grooved surfaces are effective to suppress the secondary electron emission, and can be a promising technique to mitigate the electron cloud effect in positron/proton storage rings. Aiming for the application in a dipole-type magnetic field, various shapes of triangular grooved surfaces have been studied at KEK. The grooves tested here have vertex angles of 20-30{sup o}, depths of 2.5-5.0 mm, and vertex roundness of 0.05-0.2 mm. In a laboratory, the secondary electron yields (SEY) of small test pieces were measured using an electron beam in a magnetic-free condition. The grooved surfaces clearly had low SEY compared to flat surfaces of the same materials. The grooves with sharper vertexes had smaller SEY. A test chamber installed in a wiggler magnet of the KEKB positron ring was used to investigate the efficacy of the grooved surface in a strong magnetic field. In the chamber, a remarkable reduction in the electron density around the beam orbit was observed compared to the case of a flat surface with TiN coating.

Physical Description

3 pages

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  • Journal Name: Conf.Proc.C100523:tupd043,2010; Conference: Presented at 1st International Particle Accelerator Conference: IPAC'10, Kyoto, Japan, 23-28 May 2010

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  • Report No.: SLAC-PUB-14124
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 982079
  • Archival Resource Key: ark:/67531/metadc1013875

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • June 15, 2010

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  • Oct. 14, 2017, 8:36 a.m.

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  • Nov. 2, 2017, 8:11 p.m.

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Suetsugu, Y.; Fukuma, H.; Shibata, K.; /KEK, Tsukuba; Pivi, M.; Wang, L. et al. Experimental Studies on Grooved Surfaces to Suppress Secondary Electron Emission, article, June 15, 2010; [California]. (digital.library.unt.edu/ark:/67531/metadc1013875/: accessed April 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.