Pump requirements for betatron-generated femtosecond X-ray laser at saturation from inner-shell transitions

• Published in: Applied physics. B, Lasers and optics Vol. 106; no. 4; pp. 809 - 816
• Main Authors: Ribière, M., Sebban, S., Jacquemot, S., Chéron, B. G., Ta Phuoc, K., Gautier, J., Grunenwald, J., Ribeiro, P., Kozlova, M., Zeitoun, P., Rousse, A.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer-Verlag 01.03.2012; Springer Verlag
• Subjects: Engineering; Lasers; Optical Devices; Optics; Photonics; Physical Chemistry; Physics; Physics and Astronomy; Quantum Optics; Electron Bunch; Linac Coherent Light Source; Radiative Transfer Calculation; Lasing Medium; Local Gain
• ISSN: 0946-2171; 1432-0649
• DOI: 10.1007/s00340-012-4912-1

We study pump requirements to produce femtosecond X-ray laser pulses at saturation from inner-shell transitions in the amplified spontaneous emission regime. Since laser-based betatron radiation is considered as the pumping source, we first study the impact of the driving laser power on its intensity. Then we investigate the amplification behavior of the K- α transition of nitrogen at 3.2 nm (395 eV) from radiative transfer calculations coupled with kinetics modeling of the ion population densities. We show that the saturation regime may be experimentally achieved by using PW-class laser-accelerated electron bunches. Finally, we show that this X-ray laser scheme can be extended to heavier atoms and we calculate pump requirements to reach saturation at 1.5 nm (849 eV) from the K- α transition of neon.