Observatorio de I+D+i UPM

Memorias de investigación

Research Publications in journals:
Toward compact ultra-intense laser-based soft x-ray laser

Year:2017

Research Areas

Information

Abstract
We report here recent work on an optical field ionized (OFI), high-order harmonic-seeded EUV laser. The amplifying medium is a plasma of nickel-like krypton obtained by OFI when focusing a 1 J, 30 fs, circularly-polarized, infrared pulse into a krypton-filled gas cell or krypton gas jet. The lasing transition is the 3d94d (J?=?0)?3d94p (J?=?1) transition of Ni-like krypton ions at 32.8 nm and is pumped by collisions with hot electrons. The gain dynamics was probed by seeding the amplifier with a high-order harmonic pulse at different delays. The gain duration monotonically decreased from 7 ps to an unprecedented shortness of 450 fs full width at halfmaximum as the amplification peak rose from 150 to 1200 with an increase of the plasma density from 3?×?1018 to 1.2?×?1020 cm?3. The integrated energy of the EUV laser pulse was also measured, and found to be around 2 ?J. It is to be noted that in the ASE mode, longer amplifiers were achieved (up to 2 cm), yielding EUV outputs up to 14 ?J.
International	Si
JCR	Si
Title	Plasma Physics And Controlled Fusion
ISBN	0741-3335
Impact factor JCR	2,392
Impact info
Volume	60

Journal number
From page	014030
To page	014030
Month	SIN MES
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