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Diagnosis of peak laser intensity from high-energy ion measurements during intense laser interactions with underdense plasmas

Published online by Cambridge University Press:  17 May 2001

K. KRUSHELNICK
Affiliation:
Imperial College of Science, Technology & Medicine, Prince Consort Road, London, SW7 2BZ, U.K.
E. CLARK
Affiliation:
Imperial College of Science, Technology & Medicine, Prince Consort Road, London, SW7 2BZ, U.K. Radiation Physics Department, AWE plc, Aldermaston, Reading RG7 4PR, U.K.
Z. NAJMUDIN
Affiliation:
Imperial College of Science, Technology & Medicine, Prince Consort Road, London, SW7 2BZ, U.K.
M. SALVATI
Affiliation:
Imperial College of Science, Technology & Medicine, Prince Consort Road, London, SW7 2BZ, U.K.
M.I.K. SANTALA
Affiliation:
Imperial College of Science, Technology & Medicine, Prince Consort Road, London, SW7 2BZ, U.K.
M. TATARAKIS
Affiliation:
Imperial College of Science, Technology & Medicine, Prince Consort Road, London, SW7 2BZ, U.K.
A.E. DANGOR
Affiliation:
Imperial College of Science, Technology & Medicine, Prince Consort Road, London, SW7 2BZ, U.K.
V. MALKA
Affiliation:
Laboratoire pour l'Utilisation des Lasers Intenses (LULI) Unité mixte no. 7605 CNRS—CEA—École Polytechnique— Université Pierre et Marie Curie, France
D. NEELY
Affiliation:
Rutherford Appleton Laboratory, Chilton, Didcot , Oxon., U.K.
R. ALLOTT
Affiliation:
Rutherford Appleton Laboratory, Chilton, Didcot , Oxon., U.K.
C. DANSON
Affiliation:
Rutherford Appleton Laboratory, Chilton, Didcot , Oxon., U.K.

Abstract

Experiments were performed using high-power laser pulses (greater than 50 TW) focused into underdense helium, neon, or deuterium plasmas (ne ≤ 5 × 1019 cm−3). Ions having energies greater than 300 keV were measured to be produced primarily at 90° to the axis of laser propagation. Ion energies greater than 6 MeV were recorded from interactions with neon. Spatially resolved pinhole images of the ion emission were also obtained and were used to estimate the intensity of the focused radiation in the interaction region.

Type
Research Article
Copyright
© 2000 Cambridge University Press

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