TY - JOUR
T1 - Spectroscopic characterization of prepulsed x-ray laser plasmas
AU - Nantel, M.
AU - Klisnick, A.
AU - Jamelot, G.
AU - Holden, P.B.
AU - Rus, B.
AU - Carillon, A.
AU - Jaegle, P.
AU - Zeitoun, P.
AU - Tallents, G.
AU - MacPhee, A.G.
AU - Lewis, Ciaran
AU - Jacquemot, S.
AU - Bonnet, L.
PY - 1996
Y1 - 1996
N2 - Through the use of time-integrated space-resolved keV spectroscopy, we investigate line plasmas showing gain in Ne-like nickel, copper, and zinc for irradiation using the prepulse technique. The experiments were conducted at 1.06 mu m with the prepulse to main pulse intensity contrast ranging from 10(-6) to 10(-2). The effect of the prepulses on the plasma conditions is inferred through spectroscopic line ratio diagnostics for the electron temperature, the Ne-like ground-state density, and the lateral size of the Ne-like region. It is observed that neither the value of the electronic temperature nor its spatially resolved profile along the linear focus axis varies significantly with the prepulse level, contrary to the lateral width and the density of the Ne-like region in the plasma, which are seen to increase. These results explain, at least in part, why prepulsed x-ray lasers show such high gain and brightness.
AB - Through the use of time-integrated space-resolved keV spectroscopy, we investigate line plasmas showing gain in Ne-like nickel, copper, and zinc for irradiation using the prepulse technique. The experiments were conducted at 1.06 mu m with the prepulse to main pulse intensity contrast ranging from 10(-6) to 10(-2). The effect of the prepulses on the plasma conditions is inferred through spectroscopic line ratio diagnostics for the electron temperature, the Ne-like ground-state density, and the lateral size of the Ne-like region. It is observed that neither the value of the electronic temperature nor its spatially resolved profile along the linear focus axis varies significantly with the prepulse level, contrary to the lateral width and the density of the Ne-like region in the plasma, which are seen to increase. These results explain, at least in part, why prepulsed x-ray lasers show such high gain and brightness.
M3 - Article
VL - 54
SP - 2852
EP - 2862
JO - Physical Review E Online
JF - Physical Review E Online
SN - 1539-3755
ER -