Ionization Induced Trapping in a Laser Wakefield Accelerator

McGuffey, C. and Thomas, A. G. R. and Schumaker, W. and Matsuoka, T. and Chvykov, V. and Dollar, F. J. and Kalintchenko, G. and Yanovsky, V. and Maksimchuk, A. and Krushelnick, K. and Bychenkov, V. Yu. and Glazyrin, I. V. and Karpeev, A. V. (2010) Ionization Induced Trapping in a Laser Wakefield Accelerator. Physical review letters, 104 (2). ISSN 0031-9007

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Abstract

Experimental studies of electrons produced in a laser wakefield accelerator indicate trapping initiated by ionization of target gas atoms. Targets composed of helium and controlled amounts of various gases were found to increase the beam charge by as much as an order of magnitude compared to pure helium at the same electron density and decrease the beam divergence from 5: 1 +/- 1: 0 to 2: 9 +/- 0: 8 mrad. The measurements are supported by particle-in-cell modeling including ionization. This mechanism should allow generation of electron beams with lower emittance and higher charge than in preionized gas.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
ID Code:
82797
Deposited By:
Deposited On:
11 Nov 2016 14:04
Refereed?:
Yes
Published?:
Published
Last Modified:
08 Jul 2020 05:57