Experimental study of proton emission from 60-fs, 200-mJ high-repetition-rate tabletop-laser pulses interacting with solid targets

I. Spencer; K. W. D. Ledingham; P. McKenna; T. McCanny; R. P. Singhal; P. S. Foster; D. Neely; A. J. Langley; E. J. Divall; C. J. Hooker; R. J. Clarke; P. A. Norreys; E. L. Clark; K. Krushelnick; J. R. Davies

doi:10.1103/PhysRevE.67.046402

Experimental study of proton emission from 60-fs, 200-mJ high-repetition-rate tabletop-laser pulses interacting with solid targets

I. Spencer, K. W. D. Ledingham, P. McKenna, T. McCanny, R. P. Singhal, P. S. Foster, D. Neely, A. J. Langley, E. J. Divall, C. J. Hooker, R. J. Clarke, P. A. Norreys, E. L. Clark, K. Krushelnick, and J. R. Davies

Phys. Rev. E 67, 046402 – Published 24 April 2003

Abstract

Measurements of proton emission have been made from a variety of solid targets irradiated by a 60-fs, 200-mJ, $7 \times 10^{18} - {W cm}^{- 2}$ laser system operating at 2 Hz. Optimum target conditions were found in terms of target material and thickness. For Mylar targets of thickness 20–40 μm, a maximum proton energy of 1.5 MeV was measured. For aluminum targets, a maximum energy of 950 keV was measured for 12 μm, and for copper, 850 keV for 12.5 μm.

Received 16 August 2002

DOI:https://doi.org/10.1103/PhysRevE.67.046402

Authors & Affiliations

I. Spencer¹, K. W. D. Ledingham^1,2,*, P. McKenna¹, T. McCanny¹, R. P. Singhal¹, P. S. Foster³, D. Neely³, A. J. Langley³, E. J. Divall³, C. J. Hooker³, R. J. Clarke³, P. A. Norreys³, E. L. Clark², K. Krushelnick⁴, and J. R. Davies⁵

¹Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom
²AWE plc, Aldermaston, Reading RG7 4PR, United Kingdom
³Central Laser Facility, Rutherford Appleton Laboratory, Chilton, Oxfordshire OX11 0QX, United Kingdom
⁴Blackett Laboratory, Imperial College, Prince Consort Road, London SW7 2BZ, United Kingdom
⁵GoLP, Instituto Superior Técnico, 1049-001 Lisboa, Portugal

^*Author to whom correspondence should be addressed. FAX: +44 141 330 5881. Electronic address: K.Ledingham@physics.gla.ac.uk

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Vol. 67, Iss. 4 — April 2003

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