Fast electron propagation in Ti foils irradiated with sub-picosecond laser pulses at Iλ{sup 2}>10{sup 18} Wcm{sup −2}μm{sup 2}

Journal Article · Sat Feb 15 00:00:00 EST 2014 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4865825· OSTI ID:22252048

Makita, M.; Nersisyan, G.; McKeever, K.; Dzelzainis, T.; White, S.; Kettle, B.; Dromey, B.; Doria, D.; Zepf, M.; Lewis, C. L. S.; Robinson, A. P. L. ^[1]; Hansen, S. B. ^[2]

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1. Central Laser Facility, Rutherford-Appleton Laboratory, Chilton Didcot, OX11 OQX (United Kingdom)
2. Sandia National Laboratory, Albuquerque, New Mexico 87123 (United States)

We have studied the propagation of fast electrons through laser irradiated Ti foils by monitoring the emission of hard X-rays and K-α radiation from bare foils and foils backed by a thick epoxy layer. Key observations include strong refluxing of electrons and divergence of the electron beam in the foil with evidence of magnetic field collimation. Our diagnostics have allowed us to estimate the fast electron temperature and fraction of laser energy converted to fast electrons. We have observed clear differences between the fast electron temperatures observed with bare and epoxy backed targets which may be due to the effects of refluxing.

• OSTI ID: 22252048
• Journal Information: Physics of Plasmas, Vol. 21, Issue 2; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELECTRON BEAMS
ELECTRON TEMPERATURE
ELECTRONS
EMISSION
EPOXIDES
FOILS
HARD X RADIATION
IRRADIATION
LASERS
LAYERS
MAGNETIC FIELDS
MONITORING
PULSES