Title :
A statistical model for field emission in superconducting cavities
Author :
Padamsee, H. ; Green, K. ; Jost, W. ; Wright, B.
Author_Institution :
Lab. of Nucl. Studies, Cornell Univ., Ithaca, NY, USA
Abstract :
A statistical model is used to account for several features of performance of an ensemble of superconducting cavities. The input parameters are: the number of emitters/area, a distribution function for emitter β values, a distribution function for emissive areas, and a processing threshold. The power deposited by emitters is calculated from the field emission current and electron impact energy. The model can successfully account for the fraction of tests that reach the maximum field Epk in an ensemble of cavities, for e.g., 1-cells @ 3 GHz or 5-cells @ 1.5 GHz. The model is used to predict the level of power needed to successfully process cavities of various surface areas with high pulsed power processing
Keywords :
beam handling equipment; electron field emission; statistical analysis; distribution function; electron impact energy; emissive areas; field emission; field emission current; high pulsed power processing; processing threshold; statistical model; superconducting cavities; Chemicals; Distribution functions; Electron emission; Explosives; Heat treatment; Microscopy; Predictive models; Radio frequency; Shape; Testing;
Conference_Titel :
Particle Accelerator Conference, 1993., Proceedings of the 1993
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-1203-1
DOI :
10.1109/PAC.1993.308704
