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10 Hz Grazing Incidence Pumped Ni-like Mo Laser at 18.9 nm with 150 mJ Pump Energy.

DE200515014587

Publication Date	2004
Personal Author	Keenan, R.; Dunn, J.; Patel, P. K.; Price, D. F.; Smith, R. F.; Shlyaptsev, V. N.
Page Count	10
Abstract	The first demonstration of the grazing incidence pumping (GRIP) scheme for laser-driven x-ray lasers (XRLs) is described utilizing 2-pulse pumping. A long pulse is incident normal to the target to produce a plasma with a particular density profile. Then a short pulse is incident at a grazing angle, chosen to optimally couple the short pulse laser energy into the specific density region where the inversion process will occur. The short pulse is simultaneously absorbed and refracted at a maximum electron density specified by the chosen pump angle then turns back into the gain region. The increased path length gives improved absorption allowing a reduction in the drive energy required for lasing. A Ni-like Mo XRL at 18.9 nm has been demonstrated with only 150 mJ total pump energy and a repetition rate of 10 Hz. We report high gains of 60 cm(sup -1) and the achievement of gain saturation for targets of 4 mm length.
Keywords	X-ray lasers Grazing incidence Pumping Pulses Wavelengths Angle of incident Gain GRIP scheme GRIP(Grazing incidence pumping)
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	200519

10 Hz Grazing Incidence Pumped Ni-like Mo Laser at 18.9 nm with 150 mJ Pump Energy.

10 Hz Grazing Incidence Pumped Ni-like Mo Laser at 18.9 nm with 150 mJ Pump Energy.
DE200515014587

Publication Date	2004
Personal Author	Keenan, R.; Dunn, J.; Patel, P. K.; Price, D. F.; Smith, R. F.; Shlyaptsev, V. N.
Page Count	10
Abstract	The first demonstration of the grazing incidence pumping (GRIP) scheme for laser-driven x-ray lasers (XRLs) is described utilizing 2-pulse pumping. A long pulse is incident normal to the target to produce a plasma with a particular density profile. Then a short pulse is incident at a grazing angle, chosen to optimally couple the short pulse laser energy into the specific density region where the inversion process will occur. The short pulse is simultaneously absorbed and refracted at a maximum electron density specified by the chosen pump angle then turns back into the gain region. The increased path length gives improved absorption allowing a reduction in the drive energy required for lasing. A Ni-like Mo XRL at 18.9 nm has been demonstrated with only 150 mJ total pump energy and a repetition rate of 10 Hz. We report high gains of 60 cm(sup -1) and the achievement of gain saturation for targets of 4 mm length.
Keywords	X-ray lasers Grazing incidence Pumping Pulses Wavelengths Angle of incident Gain GRIP scheme GRIP(Grazing incidence pumping)
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	200519