Preliminary calculations of ballistic bunch compression with thermionic cathode rf guns

John Wesley Lewellen IV; Stephen V. Milton

doi:10.1117/12.293362

1 November 1997 Preliminary calculations of ballistic bunch compression with thermionic cathode rf guns

John Wesley Lewellen IV, Stephen V. Milton

Proceedings Volume 3154, Coherent Electron-Beam X-Ray Sources: Techniques and Applications; (1997) https://doi.org/10.1117/12.293362
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

Preliminary calculations using the computer code PARMELA indicate that it is possible to achieve peak currents on the order of 1 kA using a thermionic-cathode rf gun and ballistic bunch compression. In contrast to traditional magnetic bunching schemes, ballistic bunch compression uses a series of rf cavities to modify the energy profile of the beam and properly chosen drifts to allow the bunching to occur naturally. The method, suitably modified, should also be directly applicable to photo injector rf guns. Present work is focusing on simultaneously compressing the bunch while reducing the emittance of the electron beam. At present, the calculated normalized rms emittance is in the neighborhood of 6.8 (pi) mrad with apeak current of 0.88 kA, and a peak bunch charge of 0.28 nC from a thermionic-cathode gun.

Citation Download Citation

John Wesley Lewellen IV and Stephen V. Milton "Preliminary calculations of ballistic bunch compression with thermionic cathode rf guns", Proc. SPIE 3154, Coherent Electron-Beam X-Ray Sources: Techniques and Applications, (1 November 1997); https://doi.org/10.1117/12.293362

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