Influence of hot electrons on the spectra of iron plasma irradiated by femtosecond laser pulses with 1021 W/cm2 intensities. (4th January 2017)

• Record Type: Journal Article
• Authors: Stafford, A.; Safronova, A.S.; Faenov, A.Ya.; Pikuz, T.A.; Kodama, R.; Kantsyrev, V.L.; Shrestha, I.; Shlyaptseva, V.V.
• Is Part Of: Laser and particle beams. Volume 35:Number 1(2017)
• Page Start: 92
• Page End: 99
• Publication Date: 2017-01-04
• Subjects: Relativistic laser plasma, -- X-ray sources, -- X-ray spectroscopy; Laser beams -- Periodicals; Particle beams -- Periodicals; 535.5
• DOI: 10.1017/S026303461600077X
• Languages: English
• ISSNs: 0263-0346

Abstract

Abstract: The use of laboratory experiments as plasma creating sources is a valuable tool for understanding astrophysical observations. Recently plasma created through irradiation by lasers with relativistic intensities has been used to study effects of hot electrons and X-ray pumping on X-ray formation of multiply charged ions spectra. This paper discusses the formation of K -shell Fe spectra recorded from a plasma irradiated by 35 fs pulses with intensities of 10 21 W/cm 2 . Modeling of the spectra suggests three different regions of plasma radiation including a cold ~10 eV region, a mild ~700 eV region, and a hot ~3500 eV region. The influence of hot electrons and X-ray pumping is discussed and a comparison with K -shell Fe spectra from a 1 MA X-pinch experiment is included to highlight the differences due to the shorter time frame of the laser–plasma interaction experiment.