Oxford Centre for High Energy Density Science (OxCHEDS)

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NEAR-FIELD IMAGING OF THE C-VI HIGH-GAIN RECOMBINATION X-RAY LASER-DRIVEN BY A 20-J, 2 PS LASER-BEAM

LASER INTERACTION WITH MATTER (1995) 125-128

Authors:

J ZHANG, MH KEY, PA NORREYS, GJ TALLENTS, D NEELY, A BEHJAT, C DANSON, A DEMIR, L DWIVEDI, M HOLDEN, CLS LEWIS, AG MACPHEE, GJ PERT, SA RAMSDEN, SJ ROSE, YF SHAO, O THOMAS, F WALSH, YL YOU
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NOVEL PLASMA SOURCE FOR DENSE-PLASMA EFFECTS

PHYSICAL REVIEW LETTERS 74:18 (1995) 3616-3619

Authors:

DJ HEADING, GR BENNETT, JS WARK, RW LEE
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NUMERICAL-SIMULATION OF OPTICALLY IONIZED PLASMA RECOMBINATION X-RAY LASERS

LASER INTERACTION WITH MATTER (1995) 407-410

Authors:

YF SHAO, SJ ROSE, A DJAOUI
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ORTHOGONAL STRAINS AND ONSET OF PLASTICITY IN SHOCKED LIF CRYSTALS

PHYSICAL REVIEW B 52:1 (1995) 8-11

Authors:

RR WHITLOCK, JS WARK
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Optical ionization and heating of gases by intense picosecond KrF laser radiation

LASER PART BEAMS 13:1 (1995) 19-31

Authors:

AA OFFENBERGER, W BLYTH, AE DANGOR, A DJAOUI, MH KEY, A MODENA, Z NAJMUDIN, SG PRESTON, JS WARK

Abstract:

We report on multiphoton ionization experiments using picosecond (ps) and sub-ps W-laser radiation at focused intensities up to 10(18) W/cm(2). The experiments are concerned with determining the electron temperature of optically ionized gases produced by intense KrF lasers. Thomson scattering, stimulated Raman scattering (SRS), and X-ray emission measurements have been made and compared with modeling calculations of heating. A particular objective is to identify the respective roles of above-threshold ionization, nonlinear inverse bremsstrahlung absorption, and SRS in determining the temperature of the electrons. Results for 350-fs pulses are compared with previous measurements for 12-ps pubes (for which strikingly different behavior is observed). The importance of using sub-ps, short-wavelength lasers to minimize electron temperature is confirmed.
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