Space and time resolved measurements of the heating of solids to ten million kelvin by a petawatt laser Export

@article{NJP2008MNakatsutsumi, abstract = {Abstract. The heating of plane solid targets by the Vulcan petawatt laser at powers of 0.32–0.73 PW and intensities of up to 4×10^20 W cm−2 has been diagnosed with a temporal resolution of 17 ps and a spatial resolution of 30 μm, by measuring optical emission from the opposite side of the target to the laser with a streak camera. Second harmonic emission was filtered out and the target viewed at an angle to eliminate optical transition radiation. Spatial resolution was obtained by imaging the emission onto a bundle of fibre optics, arranged into a one-dimensional array at the camera entrance. The results show that a region 160 μm in diameter can be heated to a temperature of \~{}107 K (kT/e\~{} keV) in solid targets from 10 to 20 μm thick and that this temperature is maintained for at least 20 ps, confirming the utility of PW lasers in the study of high energy density physics. Hybrid code modelling shows that magnetic field generation prevents increased target heating by electron refluxing above a certain target thickness and that the absorption of laser energy into electrons entering the solid target was between 15–30\%, and tends to increase with laser energy.}, author = {Nakatsutsumi, M. and Davies, J. R. and Kodama, R. and Green, J. S. and Lancaster, K. L. and Akli, K. U. and Beg, F. N. and Chen, S. N. and Clark, D. and Freeman, R. R. and Gregory, C. D. and Habara, H. and Heathcote, R. and Hey, D. S. and Highbarger, K. and Jaanimagi, P. and Key, M. H. and Krushelnick, K. and Ma, T. and Macphee, A. and Mackinnon, A. J. and Nakamura, H. and Stephens, R. B. and Storm, M. and Tampo, M. and Theobald, W. and Van Woerkom, L. and Weber, R. L. and Wei, M. S. and Woolsey, N. C. and Norreys, P. A.}, citeulike-article-id = {2714130}, citeulike-linkout-0 = {http://dx.doi.org/10.1088/1367-2630/10/4/043046}, doi = {10.1088/1367-2630/10/4/043046}, issn = {1367-2630}, journal = {New J. Phys.}, keywords = {high-filed-physics, laser-heating, petewatt}, month = {April}, number = {4}, pages = {043046+}, posted-at = {2008-09-29 17:16:33}, priority = {5}, publisher = {Institute of Physics Publishing}, title = {Space and time resolved measurements of the heating of solids to ten million kelvin by a petawatt laser}, url = {http://dx.doi.org/10.1088/1367-2630/10/4/043046}, volume = {10}, year = {2008} }

TY - JOUR ID - NJP2008MNakatsutsumi L3 - citeulike-article-id:2714130 N2 - Abstract. The heating of plane solid targets by the Vulcan petawatt laser at powers of 0.32–0.73 PW and intensities of up to 4×10^20 W cm−2 has been diagnosed with a temporal resolution of 17 ps and a spatial resolution of 30 μm, by measuring optical emission from the opposite side of the target to the laser with a streak camera. Second harmonic emission was filtered out and the target viewed at an angle to eliminate optical transition radiation. Spatial resolution was obtained by imaging the emission onto a bundle of fibre optics, arranged into a one-dimensional array at the camera entrance. The results show that a region 160 μm in diameter can be heated to a temperature of ~107 K (kT/e~ keV) in solid targets from 10 to 20 μm thick and that this temperature is maintained for at least 20 ps, confirming the utility of PW lasers in the study of high energy density physics. Hybrid code modelling shows that magnetic field generation prevents increased target heating by electron refluxing above a certain target thickness and that the absorption of laser energy into electrons entering the solid target was between 15–30%, and tends to increase with laser energy. IS - 4 JF - New J. Phys. SN - 1367-2630 TI - Space and time resolved measurements of the heating of solids to ten million kelvin by a petawatt laser PB - Institute of Physics Publishing VL - 10 SP - 043046 KW - high-filed-physics KW - laser-heating KW - petewatt AU - Nakatsutsumi, M AU - Davies, JR AU - Kodama, R AU - Green, JS AU - Lancaster, KL AU - Akli, KU AU - Beg, FN AU - Chen, SN AU - Clark, D AU - Freeman, RR AU - Gregory, CD AU - Habara, H AU - Heathcote, R AU - Hey, DS AU - Highbarger, K AU - Jaanimagi, P AU - Key, MH AU - Krushelnick, K AU - Ma, T AU - Macphee, A AU - Mackinnon, AJ AU - Nakamura, H AU - Stephens, RB AU - Storm, M AU - Tampo, M AU - Theobald, W AU - Van Woerkom, L AU - Weber, RL AU - Wei, MS AU - Woolsey, NC AU - Norreys, PA PY - 2008/04// UR - http://dx.doi.org/10.1088/1367-2630/10/4/043046 ER -