Demonstration of a 10-Hz Femtosecond-Pulse-Driven XUV Laser at 41.8 nm in Xe IX

Abstract

We report the observation of extreme UV lasing at 41.81 nm on the 4d 9 5d 1 S 0-4d 9 5p 1 P 1 transition in Xe IX, as proposed by Lemoff et al. [Opt. Lett. 19, 569 (1994)]. A 10-Hz circularly polarized 800-nm laser pulse with an energy of 70 mJ and a duration of 40 fs is longitudinally focused to a peak intensity of .3 3 10 16 Wcm 2 over a length of 8.4 nm in a differentially pumped cell containing 12 Torr of Xe gas. Laser amplification was observed with an estimated gain coefficient of 13 cm-1 and a total gain of exp(11).

Ultrafast electronic spectroscopy for chemical analysis near liquid water interfaces: concepts and applications

“…The electron temperature has been measured by Thomson scattering [74]. The ionization stage has been determined by ion spectrometry [75] and by recording the emission of X-rays from the plasma [76]. The time-resolved plasma density profile has been measured by optical interferometry and holography [77,78].…”

Laser X-UV en schéma collisionnel OFI à 41,8 nm créé dans des tubes capillaires

“…Ce schéma permet d'obtenir des émissions laser à des longueurs d'onde inférieures à 50 nm. La démonstration d'une raie lasante à 41,8 nm dans le Xe 8+ en utilisant un schéma par pompage collisionnel a marqué une avancée significative dans ce domaine [1]. Un tel système repose sur l'excitation collisionnelle électronique de gaz ionisés 8 fois par champ optique, nécessitant des intensités laser de 10 16 à 10 17 W/cm 2 .…”

Summary report: Working group 7 on “laser sources for particle acceleration”

“…Incoherent picosecond soft x-ray pulses have been produced by the interaction of intense highcontrast pulses with solid targets [20,21,22]. Coherent XUV radiation has been generated by TW-pulse-driven laser action [23] and by high order harmonic generation [24] in gases. Of particular relevance to the advanced accelerator community is the recent generation of fs x-ray pulses by 90 degree Thomson scattering of a TW laser pulse (100 fs, 40 rnJ, 800 nm., 1015 W/cm 2) from electron pulses (1.5 nC, 15 ps, 50 MeV) in the injector linac at the Berkeley Advanced Light Source [25].…”