scholarly journals LASER PHOTOIONIZATION SENSOR TECHNOLOGY AND NEW POSSIBLE PRINCIPAL SCHEME FOR γ -LASER ON QUICKLY DECAYED NUCLEAR ISOMERS WITH ELECTRIC FIELD AND AUTO-IONIZATION SORTING OF EXCITED ATOMS

2014 ◽  
Vol 2 (3) ◽  
pp. 18-22
Author(s):  
S. V. Ambrosov
Keyword(s):  
Electric Field ◽  
Sensor Technology ◽  
Nuclear Isomers ◽  
Excited Atoms ◽  
Laser Photoionization

scholarly journals Glow Discharge in a High-Velocity Air Flow: The Role of the Associative Ionization Reactions Involving Excited Atoms

Materials ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 2524 ◽  
Author(s):  
Ezequiel Cejas ◽  
Beatriz Rosa Mancinelli ◽  
Leandro Prevosto
Keyword(s):  
Glow Discharge ◽  
Electric Field ◽  
Activation Barrier ◽  
Thermal Dissociation ◽  
Kinetic Scheme ◽  
Gas Temperature ◽  
Vibrationally Excited ◽  
Excited Atoms ◽  
Associative Ionization ◽  
Excited Nitrogen

A kinetic scheme for non-equilibrium regimes of atmospheric pressure air discharges is developed. A distinctive feature of this model is that it includes associative ionization with the participation of N(2D, 2P) atoms. The thermal dissociation of vibrationally excited nitrogen molecules and the electronic excitation from all the vibrational levels of the nitrogen molecules are also accounted for. The model is used to simulate the parameters of a glow discharge ignited in a fast longitudinal flow of preheated (T0 = 1800–2900 K) air. The results adequately describe the dependence of the electric field in the glow discharge on the initial gas temperature. For T0 = 1800 K, a substantial acceleration in the ionization kinetics of the discharge is found at current densities larger than 3 A/cm2, mainly due to the N(2P) + O(3P) → NO+ + e process; being the N(2P) atoms produced via quenching of N2(A3∑u+) molecules by N(4S) atoms. Correspondingly, the reduced electric field noticeably falls because the electron energy (6.2 eV) required for the excitation of the N2(A3∑u+) state is considerably lower than the ionization energy (9.27 eV) of the NO molecules. For higher values of T0, the associative ionization N(2D) + O(3P) → NO+ + e process (with a low–activation barrier of 0.38 eV) becomes also important in the production of charged particles. The N(2D) atoms being mainly produced via quenching of N2(A3∑u+) molecules by O(3P) atoms.

Deflection of laser-excited atoms by an electric field

1977 ◽  
Vol 16 (2) ◽  
pp. 583-588 ◽  
Author(s):  
M. H. Mittleman ◽  
K. Rubin ◽  
R. H. Callender ◽  
J. I. Gersten
Keyword(s):  
Electric Field ◽  
Excited Atoms

scholarly journals Electroluminescent optical fiber sensor for detection of a high intensity electric field

2020 ◽  
Vol 12 (1) ◽  
pp. 19
Author(s):  
Tadeusz Piotr Pustelny
Keyword(s):  
Electric Field ◽  
Optical Fiber ◽  
Fiber Optics ◽  
Fiber Optic ◽  
Light Emission ◽  
Fiber Type ◽  
Optical Fiber Sensor ◽  
Fiber Sensor ◽  
Sensor Technology ◽  
Experimental Investigations

On-line testing of high power electromagnetic devices is one of the most important problems of modern industrial metrology. In the paper, the results of experimental investigations of the electric field optical fiber sensor based on the electroluminescent phenomena are presented. The electro¬luminescent effect is observed in some composite semicon¬ductors, among others in zinc sulfide ZnS crystals. In our investigations, the used ZnS crystal was doped with copper Cu atoms as activators. The concentration of activator in the ZnS crystal was about 5.10-4 [g/g]. According to plans of investi¬gations of the elaborated electroluminescent sensor, the spectral properties as well as the intensity of light emission in sinusoidal alternating electric field were tested.Full Text: PDF References:K.T.V. Grattan, Fiber Optic Fluorescence Thermometry, Chapman and Hall, London, 1996 [CrossRef]K. Kyuma, S. Tai, T. Sawada, "Fiber-optic instrument for temperature measurement", J. Quntum. Electronics, 73(3), 1997 [CrossRef]A. Brief, J. Chem. Educ., 88(6), 731 (2011). [CrossRef]T. Pustelny, B. Pustelny, "Investigation of electroluminophores for their practical application in optical fibre sensor technology", Opto-Electronics Rev.,10(3), 193 (2002). [CrossRef]A.Wrzesinska, Photo- and electroluminophore, Wroclaw, PWN Press, 1988, (in polish) [DirectLink]K.A. Franz, W.G. Kehr, "Luminescent Materials", Ullmans Encyclopedie of Industral Chemistry, Wiley-VCH, Veinhen, 2008 [CrossRef]A.G. Milnes, Deep Impurities In Semiconductors, A Willey-Interscience Publication, Toronto, 1993 [DirectLink]M. Aven, J.S. Prener, Physics and Chemistry of II-VI Compounds, North-Holland Publishing Company - Amsterdam, 1993 [DirectLink]P.K. Cheo, Fiber Optics Devices and Systems, Prentice-Hall, 1985 [CrossRef]D. Randall, Fluorescence and Phosphorescence, Grown, Oxford, 2007. [CrossRef]M. Koen, Photoconductivity of Semiconductors, Edited by Parks, New York, 1996 [CrossRef]K.R. Murphy, C.A. Stedmon, Annal. Methods, 6(3), 658, (2014) [CrossRef]T. Pustelny, K. Barczak, K. Gut, J. Wojcik, "Special optical fiber type D applied in optical sensor of electric currents", Optica Applicata, 34(4), 531 (2004). [DirectLink]K. Barczak, T. Pustelny, D. Dorosz, J. Dorosz, "Polarization maintaining fibers for application in magnetic field measurements", Europ. Phys. Journal: S.T., 154, 11, (2008) [CrossRef]

Security applications of a remote electric-field sensor technology

2008 ◽  
Author(s):  
Robert J. Prance ◽  
Christopher J. Harland ◽  
Helen Prance
Keyword(s):  
Electric Field ◽  
Sensor Technology ◽  
Security Applications ◽  
Electric Field Sensor ◽  
Field Sensor

scholarly journals Advanced Laser-Photoionization Scheme of Separation of Heavy Isotopes in the Gases Separator Devices

2021 ◽  
pp. 173-183
Author(s):  
O.V. Glushkov ◽  
O.Yu. Khetselius ◽  
A.A. Kuznetsova ◽  
A.A. Svinarenko ◽  
V.B. Ternovsky
Keyword(s):  
Electric Field ◽  
Isotope Separation ◽  
Rydberg States ◽  
Pulsed Electric Field ◽  
Field Ionization ◽  
Uranium Isotopes ◽  
Atomic Processes ◽  
Theory Of Optimal Control ◽  
Laser Photoionization ◽  
Gas Separator

An effective approach to determining the parameters of the optimal schemes of the method of laser selective photoionization of atoms (elements and isotopes) with finite ionization due to collisions, ionization by a pulsed electric field, ionization through high (Rydberg) states and narrow autoionization resonances for the separation of heavy isotopes has been proposed. in gas separator devices. On the basis of the theory of optimal control and previously developed quantum models for calculating the characteristics of elementary atomic processes, optimization models of isotope separation are numerically implemented in the scheme of selective laser photoionization with ionization due to collisions in gas mixtures, ionization by a pulsed electric field, autoionization, etc. etc. The data obtained quantitatively confirm the promise of the method of laser photoionization with finite ionization due to collisions, ionization by a pulsed electric field, ionization through high-lying (Rydberg) states and narrow autoionization resonances and give a set of parameters for the desired optimal schemes, in particular, the laser pulse optimal shape for rubidium and uranium isotopes.

scholarly journals NEW LASER PHOTOIONIZATION ISOTOPE SEPARATION SCHEME WITH AUTOIONIZATION SORTING OF HIGHLY EXCITED ATOMS FOR HIGHLY RADIOACTIVE ISOTOPES AND PRODUCTS OF ATOMIC ENERGETICS

2011 ◽  
Vol 8 (2) ◽  
pp. 81-86
Author(s):  
О. В. Глушков ◽  
Г. П. Препелица ◽  
О. Ю. Погосов ◽  
В. Г. Шевчук ◽  
А. А. Свинаренко ◽  
...  
Keyword(s):  
Isotope Separation ◽  
Radioactive Isotopes ◽  
Separation Scheme ◽  
Excited Atoms ◽  
Laser Photoionization
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