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TU202 ILC Siting in Moscow Region Near Dubna and ILC Related Activity at JINR laser, diagnostics, linac, cryomodule 360
 
  • G. Shirkov, Ju. Boudagov, Yu.N. Denisov, I.N. Meshkov, A.N. Sissakian, G.V. Trubnikov
    JINR, Dubna, Moscow Region
 
 

The report presents the development of investigations on ILC siting in the Dubna region and ILC related activity at JINR. The report will describe the fields of activities ongoing to support the ILC at JINR. In addition, other linear accelerator activities at JINR will be summarized.

 

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THP063 A New Local Field Quantity Describing the High Gradient Limit of Accelerating Structures accelerating-gradient, vacuum, linac, status 936
 
  • A. Grudiev, W. Wuensch
    CERN, Geneva
 
 

A new local field quantity which gives the high gradient performance limit of accelerating structures in the presence of vacuum rf breakdown is presented. A model of the breakdown trigger based on the pulsed heating of a potential breakdown site by the field emission currents and driven by a new field quantity, a modified Poynting vector, has been derived. The field quantity Sc takes into account both active and reactive power flow on the surface. This new quantity has been evaluated for many X-band and 30 GHz rf tests, both travelling wave and standing wave, and the value of Sc achieved in the experiments agrees well with analytical estimates.

 

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