“School of Particles And Accelerator”

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Paper   IPM / Particles And Accelerator / 14863
School of Particles and Accelerator
  Title:   Experimental analysis of surface finish in normal conducting cavities
1.  A Zarrebini-Esfahania
2.  Morteza Aslaninejad
3.  M Ristic
4.  K Long
  Status:   Published
  Journal: Nucl. Instr. and Meth. in Phys. Res. A
  Vol.:  869
  Year:  2017
  Pages:   76-83
  Supported by:  IPM
A normal conducting 805 MHz test cavity with an in built button shaped sample is used to conduct a series of surface treatment experiments. The button enhances the local fields and influences the likelihood of an RF breakdown event. Because of their smaller sizes, compared to the whole cavity surface, they allow practical investigations of the effects of cavity surface preparation in relation to RF breakdown. Manufacturing techniques and steps for preparing the buttons to improve the surface quality are described in detail. It was observed that even after the final stage of the surface treatment, defects on the surface of the cavities still could be found.

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