Amplified spontaneous emission on the J = 2 → 1, 3p-3s transition of neonlike argon in a capillary discharge

Hildebrand, A.; Ruhrmann, A.; Maurmann, S.; Kunze, H.‐J.

doi:10.1016/0375-9601(96)83718-2

Cited by 12 publications

(11 citation statements)

References 9 publications

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“…A small gain was also observed in the Jϭ2 -1 line of Ne-like Ar at 69.8 nm. 82 The existence of small amplification in the Jϭ2 -1 line was later also reported by Hildebrand et al 244 Subsequent experiments employed longer plasma columns, up to 20 cm in length, under better optimized discharge conditions. Double-pass amplification experiments were also conducted using an Ir mirror.…”

Section: Ne-like Ar Lasermentioning

confidence: 85%

Table-top soft x-ray lasers

Rocca

1999

Review of Scientific Instruments

218

106

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This article reviews the progress in the development of practical table-top sources of soft x-ray laser radiation. The field is rapidly approaching the stage at which soft x-ray lasers sufficiently compact to fit onto a normal optical table will be routinely utilized in science and technology. This is the result of recent advances in the amplification of soft x-ray radiation in both compact laser-pumped and discharge-pumped devices. The use of excitation mechanisms that take full advantage of new ultrafast high power optical laser drivers and multiple pulse excitation schemes has resulted in the demonstration of saturated soft x-ray amplification at wavelengths as short as 14 nm using several Joule of laser-pump energy. Moreover, several schemes have demonstrated significant gain with only a fraction of a Joule of laser-pump energy. In addition, the demonstration of saturated table-top soft x-ray lasers pumped by very compact capillary discharges has shattered the notion that discharge-created plasmas are insufficiently uniform to allow for soft x-ray amplification, opening a route for the development of efficient, high average power soft x-ray lasers. Recently, a table-top capillary discharge laser operating at 46.9 nm has produced millijoule-level laser pulses at a repetition rate of several Hz, with a corresponding spatially coherent average power per unit bandwidth comparable to that of a beam line at a third generation synchrotron facility. This review summarizes fundamental and technical aspects of table-top soft x-ray lasers based on the generation of population inversions in plasmas, and discusses the present status of development of specific laser systems.

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Section: Ne-like Ar Lasermentioning

confidence: 85%

Table-top soft x-ray lasers

Rocca

1999

Review of Scientific Instruments

218

106

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“…Breakdown occurred when the respective pressure was reached; a small gain of G·l ≈ 2 was identified on the Ar ix 3p − 3s transition with J = 2→1 at 69.8 nm ("C-line") and not on the A-line as expected [10]. Breakdown occurred when the respective pressure was reached; a small gain of G·l ≈ 2 was identified on the Ar ix 3p − 3s transition with J = 2→1 at 69.8 nm ("C-line") and not on the A-line as expected [10].…”

Section: Introductionmentioning

confidence: 53%

Investigation of Dense Argon Plasmas in a Simple Capillary Discharge

Hildebrand

Juschkin

Kröger

2000

Contrib. Plasma Phys.

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In a simple capillary discharge with charging voltages as high as 35 kV dense argon plasmas were produced and studied displaying reproduceable emission of the 3p − 3s lines of the Ar ix ion. The obtained electron densities did not exceed 2 × 10 18 cm −3 , and no clear lasing was observed. Pinhole spectra and time resolved measurements of the electron density indicate that the compression of the plasma was too weak because of the slow current rise. Comparison with a faster discharge indicates that a minimum current rise of 0.6 × 10 12 A/s is needed to obtain sufficient compression and thus measurable gain on Ar ix 3p − 3s lines.

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“…Ceci n'est pas le cas pour l'autre méthode (type Kunze), a priori plus simple à mettre en oeuvre, récemment développée dans plusieurs laboratoire à travers le monde. Outre les équipes déjà mentionnées, Shin et al [1,21], Kunze et al [22][23][24][25], Morgan et al [26], on peut citer, liste non exhaustive, l'équipe de Knight et Panin [27] de Brigham Young University, USA, en collaboration avec l'Institut de Spectroscopie de Moscou (Ivanov), l'équipe de Aumayr [29][30] de Institut fur Allgemeine Physik de Vienne, Autriche. D'autre part, l'équipe de Langhoff du Physikalisches Institut der Universität Würzburg, RFA [34] et celle de Hoffmann [35] du Physikalisches Institut der Universität Erlangen travaillent sur des dispositifs de type Z-pinch dynamique En France, un programme d'expériences, financé par la DRET, le CNRS et la Région Centre, vient d'être lancé par le GREMI, CNRSAJniversité d'Orléans, en collaboration avec le laboratoire PMI de l'Ecole Polytechnique.…”

Section: Methodes Experimentales Et Principaux Resultatsunclassified

Génération de rayonnement X cohérent et incohérent par décharges et micro-décharges capillaires : progrès récents et perspectives

Pouvesle

1997

Ann. Phys. Fr.

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Résumé: Des avancées très importantes ont été réalisées au cours des dernières années dans le domaine des « laser X » pompés par décharge grâce au développement de décharges et microdécharges capillaires permettant d'obtenir des plasmas chauds, denses et homogènes à grand rapport d'aspect (longueur sur diamètre) à partir de systèmes de petite taille. Nous présenterons ici les développements en cours ainsi que les derniers résultats obtenus sur ce sujet.

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Amplified spontaneous emission on the J = 2 → 1, 3p-3s transition of neonlike argon in a capillary discharge

Cited by 12 publications

References 9 publications

Table-top soft x-ray lasers

Table-top soft x-ray lasers

Investigation of Dense Argon Plasmas in a Simple Capillary Discharge

Génération de rayonnement X cohérent et incohérent par décharges et micro-décharges capillaires : progrès récents et perspectives

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