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400 TW operation of Orion at ultra-high contrast

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Abstract

The Orion facility at the Atomic Weapons Establishment in the United Kingdom has the capability to operate one of its two 500 J, 500 fs short-pulse petawatt beams at the second harmonic, the principal reason being to increase the temporal contrast of the pulse on target. This is achieved post-compression, using 3 mm thick type-1 potassium dihydrogen phosphate crystals. Since the beam diameter of the compressed pulse is ${\sim}600$ mm, it is impractical to achieve this over the full aperture due to the unavailability of the large aperture crystals. Frequency doubling was originally achieved on Orion using a circular sub-aperture of 300 mm diameter. The reduction in aperture limited the output energy to 100 J. The second-harmonic capability has been upgraded by taking two square 300 mm $\times$ 300 mm sub-apertures from the beam and combining them at focus using a single paraboloidal mirror, thus creating a 200 J, 500 fs, i.e., 400 TW facility at the second harmonic.

Newport宣传-MKS新实验室计划
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DOI:10.1017/hpl.2018.44

收稿日期:2018-05-01

录用日期:2018-06-21

网络出版日期:2018-07-20

作者单位    点击查看

Stefan Parker:AWE plc, Aldermaston, Reading RG7 4PR, UK
Colin Danson:AWE plc, Aldermaston, Reading RG7 4PR, UK
David Egan:AWE plc, Aldermaston, Reading RG7 4PR, UK
Stephen Elsmere:AWE plc, Aldermaston, Reading RG7 4PR, UK
Mark Girling:AWE plc, Aldermaston, Reading RG7 4PR, UK
Ewan Harvey:AWE plc, Aldermaston, Reading RG7 4PR, UK
David Hillier:AWE plc, Aldermaston, Reading RG7 4PR, UK
Dianne Hussey:AWE plc, Aldermaston, Reading RG7 4PR, UK
Stephen Masoero:AWE plc, Aldermaston, Reading RG7 4PR, UK
James McLoughlin:AWE plc, Aldermaston, Reading RG7 4PR, UK
Rory Penman:AWE plc, Aldermaston, Reading RG7 4PR, UK
Paul Treadwell:AWE plc, Aldermaston, Reading RG7 4PR, UK
David Winter:AWE plc, Aldermaston, Reading RG7 4PR, UK
Nicholas Hopps:AWE plc, Aldermaston, Reading RG7 4PR, UK

联系人作者:Stefan Parker(Stefan.parker@awe.co.uk)

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引用该论文

Stefan Parker, Colin Danson, David Egan, Stephen Elsmere, Mark Girling, Ewan Harvey, David Hillier, Dianne Hussey, Stephen Masoero, James McLoughlin, Rory Penman, Paul Treadwell, David Winter, and Nicholas Hopps, "400 TW operation of Orion at ultra-high contrast," High Power Laser Science and Engineering 6(3), e47 (2018)

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