Demonstration of a Soft X-Ray Amplifier

Matthews, Dennis L; Hagelstein, Peter L.; Rosen, M. D.; Eckart, M. J.; Ceglio, N. M.; Hazi, Andrew U.; Medecki, H.; MacGowan, B. J.; Trebes, J. E.; Whitten, B. L.; Campbell, E. M.; Hatcher, C. W.; Hawryluk, A. M.; Kauffman, R. L.; Pleasance, Lyn D.; Rambach, G.D.; Scofield, J. H.; Stone, G.; Weaver, T. A.

doi:10.1103/physrevlett.54.110

Cited by 984 publications

(153 citation statements)

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“…Secondly, it is believed possible than an understanding of these physical interactions will provide a basis for an efficient means for the generation of stimulated emission in the X-ray range [4] by direct, highly nonlinear coupling of ultraviolet radiation to atoms and molecules. This view follows since (a) the fundamental task in the production of coherent short wavelength radiation is the controlled deposition of energy at high specific power and since (b) there is accumulating physical evidence [4,5,[9][10][11][12][13][14][15][16][17] [4,[18][19][20]. This situation stems directly from basic physical reasoning [4, 21, [4, 9, 10], a model which bears an analogy to certain atom-atom and ion-atom collisional processes [9].…”

mentioning

confidence: 99%

Limiting cross sections for multiphoton coupling

Boyer

Jara

Luk

et al. 1987

Rev. Phys. Appl. (Paris)

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The availability of extraordinarily bright femtosecond ultraviolet sources is rapidly extending the study of nonlinear atomic responses into an unexplored regime involving intensities in the range of ∼ 10^20 W/cm 2. An estimate is made, covering approximately ten orders of magnitude in intensity, of the effective cross section <σNγ> for nonlinear energy transfer to atoms undergoing subpicosecond irradiation. This treatment, which includes : (a) threshold measurements for low stages of ionization in the low intensity regime (< 10^14 W/cm 2), (b) the experimentally determined average cross section for total energy transfer at an intermediate intensity (∼ 10^16 W/cm 2), and (c) theoretical estimates for the strong field regime (> 10^19 W/cm2), indicates that the cross section for energy transfer in the high intensity (> 10^19 W/cm2) high Z limit falls in a relatively narrow range between simply established upper and lower bounds. The values of these limits are σm = 8 π λ2 c (upper) and the magnitude of the total photoabsorption cross section of Cf at the K edge (lower). Based on this analysis, the maximum cross section for heavy atoms in the high intensity limit is expected to be approximately <σ Nγ> max ∼ 10^-20 cm2, a value which represents an energy transfer rate of ∼ 1 W/atom for an assumed intensity of 10^20 W/cm2. Coupling of this strength would enable the creation of highly energetic and strongly nonequilibrium states of matter and motivates the conclusion that stimulated emission in the X-ray range can be generated by these means

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mentioning

confidence: 99%

Limiting cross sections for multiphoton coupling

Boyer

Jara

Luk

et al. 1987

Rev. Phys. Appl. (Paris)

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“…As part of this program [6,7] LLNL did succeed in demonstrating the first X-ray laser in the early 1980's using a nuclear explosion to drive the X-ray laser. Later the laboratory effort succeeded in demonstrating the Ne-like Se laser on Novette [4].…”

Section: Joseph Nilsenmentioning

confidence: 99%

“…like X-ray lasers on these transitions and seven years later LLNL demonstrated the first laboratory X-ray laser in Ne-like Se on these transitions [4].…”

Section: Joseph Nilsenmentioning

confidence: 99%

Reminiscing about the early years of the X-ray laser

Nilsen

2003

Quantum Electron.

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“…These researchers have aimed to produce short-wavelength lasers that generate coherent x-rays [1,2]. The shorter the wavelength, the better the imaging resolution of the laser and the shorter the pulse duration, leading to better temporal resolution in probe measurements.…”

Section: Introductionmentioning

confidence: 99%

Atomic inner-shell radiation seeded free-electron lasers

Zhang

Yan

et al. 2018

Phys. Rev. Accel. Beams

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In order to effectively improve the output quality of x-ray free electron laser (XFEL), we theoretically propose an XFEL scheme seeded by atomic inner-shell laser. Atomic inner-shell lasers based on neutral atoms and pumped by XFEL have been experimentally demonstrated [Rohringer et al., Nature (London) 481, 488 (2012), Yoneda et al., Nature (London) 524, 446 (2015)], which produced sub-femtosecond X-ray pulses with increased temporal coherence. It shows that, by using the inner-shell laser as a seed to modulate the electron bunch, very stable and almost fully-coherent short-wavelength XFEL pulses can be generated. The proposed scheme holds promising prospects in x-ray wavelengths, and even shorter.

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Demonstration of a Soft X-Ray Amplifier

Cited by 984 publications

References 6 publications

Limiting cross sections for multiphoton coupling

Limiting cross sections for multiphoton coupling

Reminiscing about the early years of the X-ray laser

Atomic inner-shell radiation seeded free-electron lasers

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