Radiological characterisation of photon radiation from ultra-high-intensity laser-plasma and nuclear interactions

Clarke, R. J. and Neely, D. and Edwards, R. D. and Wright, P. N. M. and Ledingham, K. W. D. and Heathcote, R. and McKenna, P. and Danson, C. N. and Brummitt, P. A. and Collier, J. L. and Hatton, P. E. and Hawkes, S. J. and Hernandez-Gomez, C. and Holligan, P. and Hutchinson, M. H. R. and Kidd, A. K. and Lester, W. J. and Neville, D. R. and Norreys, P. A. and Pepler, D. A. and Winstone, T. B. and Wyatt, R. W. W. and Wyborn, B. E. (2006) Radiological characterisation of photon radiation from ultra-high-intensity laser-plasma and nuclear interactions. Journal of Radiological protection, 26 (3). pp. 277-286. ISSN 0952-4746

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Abstract

With the increasing number of multi-terawatt (10(12) W) and petawatt (10(15) W) laser interaction facilities being built, the need for a detailed understanding of the potential radiological hazards is required and their impact on personnel is of major concern. Experiments at a number of facilities are being undertaken to achieve this aim. This paper describes the recent work completed on the Vulcan petawatt laser system at the CCLRC Rutherford Appleton Laboratory, where photon doses of up to 43 mSv at 1 m per shot have been measured during commissioning studies. It also overviews the shielding in place on the facility in order to comply with the Ionising Radiation Regulations 1999 (IRR99), maintaining a dose to personnel of less than 1 mSv yr(-1) and as low as reasonably practicable (ALARP).