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Phys. Rev. ST Accel. Beams 9, 053501 (2006) [7 pages]

Experimental investigation of the longitudinal beam dynamics in a photoinjector using a two-macroparticle bunch

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P. Piot1,2 *, R. Tikhoplav3 †, D. Mihalcea1, and N. Barov1 ‡
1Northern Illinois University, Department of Physics, DeKalb, Illinois 60115, USA
2Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510, USA
3University of Rochester, Department of Physics & Astronomy, Rochester, New York 14627, USA

Received 21 March 2006; published 18 May 2006

We have developed a two-macroparticle bunch to explore the longitudinal beam dynamics through various components of the Fermilab/NICADD photoinjector. Such a two-macroparticle bunch is generated by splitting the ultraviolet pulse from the photocathode drive laser. The presented method allows the exploration of radio-frequency-induced compression in the 1.625 cell radio frequency gun and the booster cavity. It also allows a direct measurement of the momentum compaction of the magnetic bunch compressor. The measurements are compared with analytical and numerical models.


©2006 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevSTAB.9.053501
DOI: 10.1103/PhysRevSTAB.9.053501
PACS: 29.27.−a, 41.85.−p, 41.75.Fr

* Electronic address: piot@nicadd.niu.edu
† Current address: University of California, Los Angeles, California 90095, USA.
‡ Current address: FAR-TECH, Inc., San Diego, California 92121, USA.

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