Vacuum ultraviolet laser spectroscopy III: laboratory sources of coherent radiation tunable from 105 to 175 nm using Mg, Zn, and Hg vapors

1985 ◽  
Vol 63 (12) ◽  
pp. 1581-1588 ◽  
Author(s):  
P. R. Herman ◽  
P. E. LaRocque ◽  
R. H. Lipson ◽  
W. Jamroz ◽  
B. P. Stoicheff
Keyword(s):  
Laser Radiation ◽  
High Resolution ◽  
Heat Pipe ◽  
Vacuum Ultraviolet ◽  
Metal Vapor ◽  
Coherent Radiation ◽  
High Resolution Spectroscopy ◽  
Nonlinear Frequency ◽  
Metal Vapors ◽  
Sufficient Intensity

Nonlinear frequency mixing of laser radiation in Mg, Zn, and Hg vapors has produced coherent radiation, tunable over the range 175–104.5 nm in the vacuum ultraviolet. The resulting radiation is pulsed, monochromatic, and of sufficient intensity for use in high-resolution spectroscopy. Detailed descriptions are given of the dye oscillator–amplifier systems along with the heat-pipe ovens for producing stable densities of the metal vapors. Measurements of intensities, linewidths, and ranges of tunability are presented for each metal vapor.

scholarly journals High Resolution Photoionization Spectrum of HBr Measured With Frequency Tripled Laser Radiation

1987 ◽  
Vol 7 (2-4) ◽  
pp. 129-139 ◽  
Author(s):  
Toshiaki Munakata ◽  
Tadahiko Mizukuki ◽  
Akira Misu ◽  
Motowo Tsukakoshi ◽  
Takahiro Kasuya
Keyword(s):  
Laser Radiation ◽  
High Resolution ◽  
Ultraviolet Radiation ◽  
Ground State ◽  
Vacuum Ultraviolet ◽  
Second Harmonic ◽  
Rydberg Series ◽  
Vacuum Ultraviolet Radiation ◽  
Ionization Limit ◽  
Photoionization Spectrum

The photoionization spectrum of HBr around the first ionization limit was measured at resolution of up to 5 x 10−4 nm. The ionizing vacuum ultraviolet radiation was generated by frequency tripling of the second harmonic output of a dye laser. Three sets of Rydberg series, each converging to the ground state (2Π3/2) of HBr+, were observed on the longer wavelength side of the ionization limit. By extrapolation of the Rydberg series, the ionization potential of HBr was determined to be 11.666 ± 0.001 eV.

Laser source of vacuum ultraviolet radiation for high-resolution spectroscopy

1986 ◽  
Vol 16 (5) ◽  
pp. 651-654
Author(s):  
R A Kink ◽  
A V Kil'k ◽  
T P Lepasaar ◽  
A É Lykhumus ◽  
Yu A Maksimov ◽  
...  
Keyword(s):  
High Resolution ◽  
Ultraviolet Radiation ◽  
Vacuum Ultraviolet ◽  
High Resolution Spectroscopy ◽  
Laser Source ◽  
Vacuum Ultraviolet Radiation

Microcalorimeters for X-Ray Spectroscopy

1988 ◽  
Vol 102 ◽  
pp. 41
Author(s):  
E. Silver ◽  
C. Hailey ◽  
S. Labov ◽  
N. Madden ◽  
D. Landis ◽  
...  
Keyword(s):  
High Resolution ◽  
High Efficiency ◽  
Thermal Response ◽  
Low Noise ◽  
High Resolution Spectroscopy ◽  
Superconducting Transition ◽  
Sapphire Substrates ◽  
Laboratory Plasmas ◽  
Adiabatic Demagnetization ◽  
Theoretical Predictions

The merits of microcalorimetry below 1°K for high resolution spectroscopy has become widely recognized on theoretical grounds. By combining the high efficiency, broadband spectral sensitivity of traditional photoelectric detectors with the high resolution capabilities characteristic of dispersive spectrometers, the microcalorimeter could potentially revolutionize spectroscopic measurements of astrophysical and laboratory plasmas. In actuality, however, the performance of prototype instruments has fallen short of theoretical predictions and practical detectors are still unavailable for use as laboratory and space-based instruments. These issues are currently being addressed by the new collaborative initiative between LLNL, LBL, U.C.I., U.C.B., and U.C.D.. Microcalorimeters of various types are being developed and tested at temperatures of 1.4, 0.3, and 0.1°K. These include monolithic devices made from NTD Germanium and composite configurations using sapphire substrates with temperature sensors fabricated from NTD Germanium, evaporative films of Germanium-Gold alloy, or material with superconducting transition edges. A new approache to low noise pulse counting electronics has been developed that allows the ultimate speed of the device to be determined solely by the detector thermal response and geometry. Our laboratory studies of the thermal and resistive properties of these and other candidate materials should enable us to characterize the pulse shape and subsequently predict the ultimate performance. We are building a compact adiabatic demagnetization refrigerator for conveniently reaching 0.1°K in the laboratory and for use in future satellite-borne missions. A description of this instrument together with results from our most recent experiments will be presented.

Sign in / Sign up

Export Citation Format

Share Document