Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Micron-scale fast electron filaments and recirculation determined from rear-side optical emission in high-intensity laser-solid interactions
AU - Bellei, C.
AU - Nagel, S. R.
AU - Kar, S.
AU - Henig, A.
AU - Kneip, S.
AU - Palmer, C.
AU - Saevert, A.
AU - Willingale, L.
AU - Carroll, D.
AU - Dromey, B.
AU - Green, J. S.
AU - Markey, K.
AU - Simpson, P.
AU - Clarke, R. J.
AU - Lowe, H.
AU - Neely, D.
AU - Spindloe, C.
AU - Tolley, M.
AU - Kaluza, M. C.
AU - Mangles, S. P. D.
AU - McKenna, P.
AU - Norreys, P. A.
AU - Schreiber, J.
AU - Zepf, M.
AU - Davies, J. R.
AU - Krushelnick, K.
AU - Najmudin, Z.
PY - 2010/7/21
Y1 - 2010/7/21
N2 - The transport of relativistic electrons generated in the interaction of petawatt class lasers with solid targets has been studied through measurements of the second harmonic optical emission from their rear surface. The high degree of polarization of the emission indicates that it is predominantly optical transition radiation (TR). A halo that surrounds the main region of emission is also polarized and is attributed to the effect of electron recirculation. The variation of the polarization state and intensity of radiation with the angle of observation indicates that the emission of TR is highly directional and provides evidence for the presence of mu m-size filaments. A brief discussion on the possible causes of such a fine electron beam structure is given.
AB - The transport of relativistic electrons generated in the interaction of petawatt class lasers with solid targets has been studied through measurements of the second harmonic optical emission from their rear surface. The high degree of polarization of the emission indicates that it is predominantly optical transition radiation (TR). A halo that surrounds the main region of emission is also polarized and is attributed to the effect of electron recirculation. The variation of the polarization state and intensity of radiation with the angle of observation indicates that the emission of TR is highly directional and provides evidence for the presence of mu m-size filaments. A brief discussion on the possible causes of such a fine electron beam structure is given.
KW - GENERATED FAST ELECTRONS
KW - TRANSITION RADIATION
KW - FAST-IGNITER
KW - TARGETS
KW - PLASMA
KW - TRANSPORT
KW - PULSES
U2 - 10.1088/1367-2630/12/7/073016
DO - 10.1088/1367-2630/12/7/073016
M3 - Journal article
VL - 12
JO - New Journal of Physics
JF - New Journal of Physics
SN - 1367-2630
M1 - 073016
ER -