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Efficient Pumping Schemes for High Average Brightness Collisional X-ray Lasers.

DE200415009726

Publication Date	2003
Personal Author	Keenan, R.; Dunn, J.; Shlyaptsev, V. N.; Smith, R. F.; Patel, P. K.; Price, D. F.
Page Count	14
Abstract	Advances in transient collisional x-ray lasers have been demonstrated over the last 5 years as a technique for achieving tabletop soft x-ray lasers using 2-10 J of laser pump energy. The high peak brightness of these sources operating in the high output saturation regime, in the range of 10(sup 24)-10(sup 25) ph. mm(sup -2) mrad(sup -2) s-1 (0.1% BW)(sup -1), is ideal for many applications requiring high photon fluence in a single short burst. However, the pump energy required for these x-ray lasers is still relatively high and limits the x-ray laser repetition rate to 1 shot every few minutes. Higher repetition rate collisional schemes have been reported and show some promise for high output in the future. We report a novel technique for enhancing the coupling efficiency of the laser pump into the gain medium that could lead to enhanced x-ray inversion with a factor of ten reduction in the drive energy. This has been applied to the collisional excitation scheme for Ni-like Mo at 18.9 nm and x-ray laser output has been demonstrated.
Keywords	X-ray lasers Brightness Bending Efficiency Excitation Magnets Lasers Photons Pumping Saturation Synchrotrons Transients
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Livermore National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200512

Efficient Pumping Schemes for High Average Brightness Collisional X-ray Lasers.

Efficient Pumping Schemes for High Average Brightness Collisional X-ray Lasers.
DE200415009726

Publication Date	2003
Personal Author	Keenan, R.; Dunn, J.; Shlyaptsev, V. N.; Smith, R. F.; Patel, P. K.; Price, D. F.
Page Count	14
Abstract	Advances in transient collisional x-ray lasers have been demonstrated over the last 5 years as a technique for achieving tabletop soft x-ray lasers using 2-10 J of laser pump energy. The high peak brightness of these sources operating in the high output saturation regime, in the range of 10(sup 24)-10(sup 25) ph. mm(sup -2) mrad(sup -2) s-1 (0.1% BW)(sup -1), is ideal for many applications requiring high photon fluence in a single short burst. However, the pump energy required for these x-ray lasers is still relatively high and limits the x-ray laser repetition rate to 1 shot every few minutes. Higher repetition rate collisional schemes have been reported and show some promise for high output in the future. We report a novel technique for enhancing the coupling efficiency of the laser pump into the gain medium that could lead to enhanced x-ray inversion with a factor of ten reduction in the drive energy. This has been applied to the collisional excitation scheme for Ni-like Mo at 18.9 nm and x-ray laser output has been demonstrated.
Keywords	X-ray lasers Brightness Bending Efficiency Excitation Magnets Lasers Photons Pumping Saturation Synchrotrons Transients
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Livermore National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200512