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Proceedings Paper

Preliminary calculations of ballistic bunch compression with thermionic cathode rf guns
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Paper 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.

Paper Details

Date Published: 1 November 1997
PDF: 10 pages
Proc. SPIE 3154, Coherent Electron-Beam X-Ray Sources: Techniques and Applications, (1 November 1997); doi: 10.1117/12.293362
Show Author Affiliations
John Wesley Lewellen, Argonne National Lab. (United States)
Stephen V. Milton, Argonne National Lab. (United States)


Published in SPIE Proceedings Vol. 3154:
Coherent Electron-Beam X-Ray Sources: Techniques and Applications
Andreas K. Freund; Henry P. Freund; Malcolm R. Howells, Editor(s)

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