Improved high‐intensity microwave discharge lamp for atomic resonance absorption and fluorescence spectrometry

1978 ◽  
Vol 49 (9) ◽  
pp. 1322-1323 ◽  
Author(s):  
Assa Lifshitz ◽  
Gordon B. Skinner ◽  
David R. Wood
Keyword(s):  
High Intensity ◽  
Microwave Discharge ◽  
Resonance Absorption ◽  
Fluorescence Spectrometry ◽  
Discharge Lamp ◽  
Atomic Resonance

EXPERIMENTAL STUDY OF REACTION OF ETHANOL WITH OXYGEN BEHIND SHOCK WAVES USING ATOMIC RESONANCE ABSORPTION SPECTROSCOPY METHOD

2020 ◽  
Author(s):  
N. S. Bystrov ◽  
◽  
A. V. Emelianov ◽  
A. V. Eremin ◽  
P. I. Yatsenko ◽  
...  
Keyword(s):  
Experimental Study ◽  
Shock Waves ◽  
Absorption Spectroscopy ◽  
Vacuum Ultraviolet ◽  
Resonance Absorption ◽  
Atomic Resonance ◽  
Quantitative Measurements ◽  
Series Of Experiments ◽  
Kinetics Of Reaction ◽  
Oxygen Atoms

The kinetics of reaction of C2H5OH with N2O behind shock waves is studied. The quantitative measurements of the time profiles of concentration of O atoms were carried out by the method of atomic resonance absorption spectroscopy (ARAS) using resonance vacuum-ultraviolet line of O-atom at 130.5 nm. For the calibration of absorption intensity of oxygen atoms depending on its concentration, the special series of experiments in the mixture containing different amounts of N2O in Ar was carried out at T = 2100 ± 50 K when molecule of N2O is completely dissociated. An experimental study of the appearance and consumption of oxygen atoms during the reaction of ethanol with oxygen in mixture 10 ppm N2O + (10 ... 0.1) ppm C2H5OH + Ar at temperatures of 16002300 K and pressures of 200-300 kPa have been carried out. A kinetic analysis of obtained data was performed using the Chemkin package.

scholarly journals Interaction of high intensity picosecond laser pulses with large preformed plasmas

1998 ◽  
Vol 16 (1) ◽  
pp. 101-113 ◽  
Author(s):  
D. Riley ◽  
R.A. Smith ◽  
A. J. MacKinnon ◽  
O. Willi ◽  
M.H.R. Hutchinson
Keyword(s):  
High Intensity ◽  
Laser Energy ◽  
Incident Light ◽  
Picosecond Laser ◽  
Laser Pulses ◽  
Resonance Absorption ◽  
Emission Data ◽  
X Ray ◽  
Spatially Resolved ◽  
Stimulated Brillouin

The interaction of short (1−2 ps) laser pulses with solid targets at irradiances of over 1016 Wcm−2, in the presence of a substantial prepulse has been investigated. High absorption of laser energy is found even at high angles of incidence, with evidence for a resonance absorption peak being found for S, P, and circular polarizations. It is considered that this may be a result of refraction and beam filamentation, which causes loss of distinct polarization. Measurements of hard X-ray emission (∼ 100 keV) confirm a resonance absorption type peak at 45−50°, again for all three cases. Typically, 5−15% of the incident light is back-reflected by stimulated Brillouin scatter, with spatially resolved spectra showing evidence of beam hot-spots at high intensity. The possibility that filamentation and refraction of the beam can explain the lack of polarization dependence in the absorption and hard X-ray emission data is discussed.

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