Oxford Centre for High Energy Density Science (OxCHEDS)

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Collisionally excited X-ray laser schemes: progress at Rutherford Appleton Laboratory (Invited Paper)

Proceedings of SPIE--the International Society for Optical Engineering SPIE, the international society for optics and photonics 1551 (1992) 49-55

Authors:

Ciaran LS Lewis, Domhnail O'Neill, David Neely, James O Uhomoibhi, Ronald E Burge, Gary E Slark, M Brown, Alan G Michette, Pierre Jaegle, Annie Klisnick, Antoine Carillon, Pierre Dhez, Gerard Jamelot, JP Raucourt, Gregory J Tallents, J Krishnan, L Dwivedi, HZ Chen, Michael H Key, Ryosuke Kodama, Peter A Norreys, SJ Rose, Jie Zhang, Geoffrey J Pert, Stuart A Ramsden
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Observation of new laser transitions and saturation effects in optically pumped NO

Applied Physics B Photophysics and Laser Chemistry 54:2 (1992) 119-125

Authors:

SM Hooker, AM Haxell, CE Webb

Abstract:

We report investigations of an NO laser employing specially profiled magnetic fields of up to 3.4T, and F2 pump laser intensities as great as 20 MW cm-2. We have observed laser oscillation at 226 nm on a rotational branch of the B'-X/it(3-11) band of NO for the first time, in addition to the previously reported oscillation at 218 nm on the B'-X/it(3-10) band. We have also observed visible laser emission on a rotational branch of the B′2Δ-B2II(3-1) band of NO. Saturation of the NO laser pulse energy with pump intensity has been observed, the total NO laser pulse energy having been increased to 490 μJ. The possibility of increasing the NO laser pulse energy towards 1 mJ per transition is discussed. © 1992 Springer-Verlag.
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Gain scaling relationships for Ne-like Ge slab targets

Optics Communications Elsevier 87:5-6 (1992) 231-236

Authors:

D Neely, CLS Lewis, DM O'Neill, JO Uhomoibhi, MH Key, SJ Rose, GJ Tallents, SA Ramsden
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Progress In X-ray Laser Research With Glass And Krf Laser Drivers At The Serc Central Laser Facility

Institute of Electrical and Electronics Engineers (IEEE) (1992) 638-639

Authors:

MH Key, T Barbee, P Bilfort, MT Browne, RE Burge, A Carillon, D Carlo, M Carter, P Charalambous, P Dhez, L Dwivedi, J Jacoby, P Jaegle, G Jamelot, Y Kato, A Kidd, A Klisnick, R Kodama, J Krishnan, CLS Lewis, S Mrowka, K Murai, D Neely, P Norreys, K Nugent, D O'Neile, GJ Pert, SA Ramsden, JP Raucourt, HZ Shen, H Shiraga, GE Stark, C Smith, PJ Smith, GJ Tallents, J Trebes, J Uhomoibin, G Yuan, J Zhang
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Saturated and near-diffraction-limited operation of an XUV laser at 23.6 nm

Physical Review Letters 68:19 (1992) 2917-2920

Authors:

A Carillon, HZ Chen, P Dhez, L Dwivedi, J Jacoby, P Jaegle, G Jamelot, Jie Zhang, MH Key, A Kidd, A Klisnick, R Kodama, J Krishnan, CLS Lewis, D Neely, P Norreys, D Oeneill, GJ Pert, SA Ramsden, JP Raucourt, GJ Tallents, J Uhomoibhi

Abstract:

Amplification of spontaneous emission (ASE) at 23.6 nm has been studied in a Ge plasma heated by a 1 TW infrared laser pulse. The exponent of the axial gain reached 21 in a geometry with Fresnel number 1. Two plasma columns of combined length up to 36 mm were used with an extreme ultraviolet mirror giving double-pass amplification. Saturation of the ASE output was observed. The beam divergence was about 8× diffraction limited with a brightness estimated at 1014 W cm-2 sr-1. The feedback from the mirror was significantly reduced probably by radiation damage from the plasma. © 1992 The American Physical Society.
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