Collisionally pumped hybrid soft X-ray laser in Ne-like sulphur

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• 作者：Janulewicz ; Karol A. ; Rocca ; Jorge J. ; Bortolotto ; Fulvia ; Sandner ; Wolfgang ; Nickles ; Peter V.
• 关键词：plasma ; X-ray laser ; collisionnal excitation ; hybrid pumping ; plasma waveguide ; X&ndash ; UV spectroscopy ; capillary discharge ; plasma ; laser à ; rayonnement X ; excitation collisionnelle ; pompage hybride ; guidage d'ondes par plasmas ; spectroscopie X&nd
• 刊名：Comptes Rendus de l'Academie des Sciences Series IV Physics
• 出版年：2000
• 出版时间：October, 2000
• 年：2000
• 卷：1
• 期：8
• 页码：1083-1092
• 全文大小：799 K

文摘

We describe an experiment demonstrating XUV amplification following collisional excitation in a capillary discharge plasma irradiated by a picosecond IR laser pulse. Guiding and temporally resolved transmission of the pump laser beam are also demonstrated and analysed. The short pump laser pulse heated rapidly the electrons producing amplification in the 3p¹S₀–3s¹P₁ transition of Ne-like sulphur at 60.84 nm. The estimated gain–length product was equal to 6.8, while the beam divergence reached 2.5 mrad for 30 mm capillary. This new, hybridly pumped collisional soft X-ray laser with the transient gain offers a new way towards efficient table-top XUV sources.