Experimental studies of x-ray laser spectral profiles: Observation of gain narrowing and saturation behavior

Conference · Fri Jul 17 04:00:00 EDT 1992

OSTI ID:10170180

Koch, J A; MacGowan, B J; Da Silva, L B; Matthews, D L; Mrowka, S ^[1]; Underwood, J H; Batson, P J ^[2]

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1. Lawrence Livermore National Lab., CA (United States)
2. Lawrence Berkeley Lab., CA (United States)

We discuss our recent measurements of the spectral width of the 206.38{Angstrom} x-ray laser transition in Ne-like Se. These measurements used a high-resolution grating spectrometer and were performed over a wide range of laser amplifier lengths. The data have enabled us to extrapolate the intrinsic line width and to observe the effects of gain-narrowing and saturation on the line profile. We find an intrinsic width which is 1.4 times the Doppler width, we observe gain-narrowing in intermediate length amplifiers, and we observe no re-broadening in long, saturated amplifiers. These results suggest that collisional line-broadening has a significant effect on the line profile and saturation behavior of this laser. We discuss modeling we have performed in order to simulate the experimental data, and we discuss future experimental and theoretical efforts we believe are necessary in order to understand line broadening and line transfer issues in x-ray laser plasmas.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48; AC03-76SF00098
• OSTI ID: 10170180
• Report Number(s): UCRL-JC--110209; CONF-9206255--1; ON: DE92019603
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426002
664300
74 ATOMIC AND MOLECULAR PHYSICS
AMPLIFIERS
COLLISION PHENOMENA
ELECTRON-ION COLLISIONS
EMISSION
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
GAIN
LASER RADIATION
LASERS AND MASERS
LINE BROADENING
SATURATION
SELENIUM
X-RAY LASERS