Cavity-enhanced resonant photoacoustic spectroscopy with optical feedback cw diode lasers: A novel technique for ultratrace gas analysis and high-resolution spectroscopy

2010 ◽  
Vol 133 (4) ◽  
pp. 044308 ◽  
Author(s):  
Michael Hippler ◽  
Christian Mohr ◽  
Katherine A. Keen ◽  
Edward D. McNaghten
Keyword(s):  
High Resolution ◽  
Photoacoustic Spectroscopy ◽  
Optical Feedback ◽  
Diode Lasers ◽  
Gas Analysis ◽  
High Resolution Spectroscopy ◽  
Novel Technique

Application of pressure-tuned diode lasers to high-resolution spectroscopy

1980 ◽  
Vol 22 (2) ◽  
pp. 241-243 ◽  
Author(s):  
V. B. Anzin ◽  
M. V. Glushkov ◽  
Yu. V. Kosichkin ◽  
A. I. Nadezhdinskii ◽  
A. N. Perov ◽  
...  
Keyword(s):  
High Resolution ◽  
Diode Lasers ◽  
High Resolution Spectroscopy

scholarly journals Optical frequency comb photoacoustic spectroscopy

2018 ◽  
Vol 20 (44) ◽  
pp. 27849-27855 ◽  
Author(s):  
Ibrahim Sadiek ◽  
Tommi Mikkonen ◽  
Markku Vainio ◽  
Juha Toivonen ◽  
Aleksandra Foltynowicz
Keyword(s):  
High Resolution ◽  
Photoacoustic Spectroscopy ◽  
Frequency Comb ◽  
Gas Analysis ◽  
Small Sample ◽  
Optical Frequency Comb ◽  
Trace Gas ◽  
Optical Frequency ◽  
Trace Gas Analysis ◽  
First Time

Optical frequency comb photoacoustic spectroscopy (OFC-PAS) is demonstrated for the first time for broadband high-resolution trace gas analysis in small sample volumes.

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.

scholarly journals Spectroscopic characterization of a thermodynamically stable doubly charged diatomic molecule: MgAr2+

2021 ◽  
Author(s):  
Dominik Wehrli ◽  
Matthieu Génévriez ◽  
Frédéric Merkt
Keyword(s):  
High Resolution ◽  
Diatomic Molecule ◽  
Spectroscopic Characterization ◽  
New Method ◽  
High Resolution Spectroscopy ◽  
Singly Charged ◽  
Doubly Charged

We present a new method to study doubly charged molecules relying on high-resolution spectroscopy of the singly charged parent cation, and report on the first spectroscopic characterization of a thermodynamically stable diatomic dication, MgAr2+.

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