Ionization induced trapping in a laser wakefield accelerator

Ionization induced trapping in a laser wakefield accelerator

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 he...

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Veröffentlicht in:Physical review letters 2010-01, Vol.104 (2), p.025004-025004, Article 025004
Hauptverfasser: McGuffey, C, Thomas, A G R, Schumaker, W, Matsuoka, T, Chvykov, V, Dollar, F J, Kalintchenko, G, Yanovsky, V, Maksimchuk, A, Krushelnick, K, Bychenkov, V Yu, Glazyrin, I V, Karpeev, A V
Format: Artikel
Sprache:eng
Schlagworte:
ACCELERATORS
ATOMS
BEAMS
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELECTRON DENSITY
ELEMENTS
FLUIDS
GASES
HELIUM
IONIZATION
LASER RADIATION
LEPTON BEAMS
LINEAR ACCELERATORS
NONMETALS
PARTICLE ACCELERATORS
PARTICLE BEAMS
RADIATIONS
RARE GASES
SIMULATION
TRAPPING
WAKEFIELD ACCELERATORS
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Zusammenfassung: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.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.104.025004