Soft x-ray pulse length measurement by pump-probe absorption spectroscopy

Book · Sat Dec 31 04:00:00 EST 1994

OSTI ID:119002

Tom, H W.K. ^[1]; Sher, M H; Mohideen, U; Wood, II, O R; Aumiller, G D ^[2]; McIlrath, T J ^[3]; Bokor, J; Freeman, R R ^[4]; Sugar, J ^[5]

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1. Univ. of California, Riverside, CA (United States)
2. AT and T Bell Labs., Holmdel, NJ (United States)
3. Univ. of Maryland, College Park, MD (United States)
4. AT and T Bell Labs., Murray Hill, NJ (United States)
5. National Institute of Standards and Technology, Gaithersburg, MD (United States)

The authors have demonstrated a system for subpicosecond, soft-x-ray continuum, pump-probe absorption spectroscopy. Using multiphoton ionization to abruptly change the x-ray absorption spectra of a gas, they have measured the temporal profile of laser-generated x-ray pulses near 90 eV. Although the x-ray pulses from a laser-generated plasma here were only as short as {approximately}20 psec, the technique is extendible to higher energy x-rays which will have pulse durations approaching 100 fsec. They also present the absorption spectrum of Kr ions produced under conditions of high intensity non-resonant multiphoton ionization. The spectra are identified with a fit to the Cowan code.

• OSTI ID: 119002
• Report Number(s): CONF-940142--; ISBN 0-8194-1409-3
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
66 PHYSICS
ABSORPTION SPECTRA
ABSORPTION SPECTROSCOPY
ELECTROMAGNETIC PULSES
EXPERIMENTAL DATA
KRYPTON IONS
LASER RADIATION
LASER-PRODUCED PLASMA
MEASURING METHODS
SOFT X RADIATION
WAVELENGTHS
X-RAY LASERS
X-RAY SPECTRA