Plasma conditions generated by interaction of a high brightness, prepulse free Raman amplified KrF laser pulse with solid targets

Abstract

A high brightness, Raman amplified KrF laser has been used to irradiate solid targets with 12 ps laser pulses at intensities above 10'^ W/cm^ without the presence of a preformed plasma caused by low level amplified spontaneous emission prepulse. Time-resolved x-ray spectroscopy of the A^-shell emission from aluminum was used to infer electron densities in excess of 10^^ cm ~^ at temperatures of several hundred electronvolts.

Fokker-Planck equation for moderately coupled plasmas

“…Therefore, in future work it will be important to include higher-order terms of the electron distribution function as well as retaining the non-linearities of the Boltzmann equation. Such transport coefficients could be then applied to a variety of plasmas, such as short-pulse laser plasmas [19][20][21][22],…”

Observation of Plasma Satellite Lines in Laser Produced Plasmas

“…The experimental conditions used in the generation and recording of the spectra were similar to those described in a previous publication [10],where good agreement between simulated and experimental emission characteristics was found. To summarize, 12 ps Raman amplified KrF laser pulses [11]at 268 nm were focused to a 50 ILm spot onto solid targets, usually aluminum slabs, at irradiances of a few times 10'5 Wcm .…”

“…Finally, we note that evidence for satellite features to the He-y line was present in previously discussed spectra [10], although that publication did not address this issue. Examination of the spectrum displayed in Ref.…”

Effect of strongly coupled plasma on the magnetic dipolar and quadrupolar transitions of two-electron ions

“…Laser induced plasmas, plasma in highly evolved stars, interior of Jovian planets, explosive shock tubes and inertial confinement fusion (ICF) and also very low temperature plasmas are examples of strongly coupled plasma. 34,[37][38][39][40] Study of such high density plasmas is useful for the understanding of the spectroscopy and microscopy of transient physical, chemical, and biological processes. 29 A few experimental 28,30,38,39 and theoretical estimates [41][42][43][44][45] are available on the spectral properties of two-electron ions due to dipole allowed transitions under strongly coupled plasma.…”