Effect of laser intensity on fast-electron-beam divergence in solid-density plasmas
Data(s) |
11/01/2008
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Resumo |
Metal foil targets were irradiated with 1 mu m wavelength (lambda) laser pulses of 5 ps duration and focused intensities (I) of up to 4x10(19) W cm(-2), giving values of both I lambda(2) and pulse duration comparable to those required for fast ignition inertial fusion. The divergence of the electrons accelerated into the target was determined from spatially resolved measurements of x-ray K-alpha emission and from transverse probing of the plasma formed on the back of the foils. Comparison of the divergence with other published data shows that it increases with I lambda(2) and is independent of pulse duration. Two-dimensional particle-in-cell simulations reproduce these results, indicating that it is a fundamental property of the laser-plasma interaction. |
Identificador | |
Idioma(s) |
eng |
Direitos |
info:eu-repo/semantics/restrictedAccess |
Fonte |
Green , J S , Ovchinnikov , V M , Evans , R G , Akli , K U , Azechi , H , Beg , F N , Bellei , C , Freeman , R R , Habara , H , Heathcote , R , Key , M H , King , J A , Lancaster , K L , Lopes , N C , Ma , T , MacKinnon , A J , Markey , K , McPhee , A , Najmudin , Z , Nilson , P , Onofrei , R , Stephens , R , Takeda , K , Tanaka , K A , Theobald , W , Tanimoto , T , Waugh , J , Van Woerkom , L , Woolsey , N C , Zepf , M , Davies , J R & Norreys , P A 2008 , ' Effect of laser intensity on fast-electron-beam divergence in solid-density plasmas ' Physical Review Letters , vol 100 , no. 1 , 015003 . DOI: 10.1103/PhysRevLett.100.015003 |
Palavras-Chave | #/dk/atira/pure/subjectarea/asjc/3100 #Physics and Astronomy(all) |
Tipo |
article |