Hot and super-hot hydrogen atoms in microwave plasma

2009 ◽  
Vol 95 (18) ◽  
pp. 181503 ◽  
Author(s):  
E. Tatarova ◽  
E. Felizardo ◽  
F. M. Dias ◽  
M. Lino da Silva ◽  
C. M. Ferreira ◽  
...  
Keyword(s):  
Microwave Plasma ◽  
Hydrogen Atoms

Stationary inverted Lyman populations and free-free and bound-free emission of lower-energy state hydride ion formed by an exothermic catalytic reaction of atomic hydrogen and certain group I catalysts

Open Physics ◽  
2010 ◽  
Vol 8 (1) ◽  
Author(s):  
Randell Mills ◽  
William Good ◽  
Peter Jansson ◽  
Jiliang He
Keyword(s):  
Catalytic Reaction ◽  
Atomic Hydrogen ◽  
Microwave Plasma ◽  
Energy State ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Hydrogen Atoms ◽  
Hydride Ion ◽  
Group I ◽  
Excess Power

AbstractRb+ to Rb2+ and 2K+ to K + K2+ each provide a reaction with a net enthalpy equal to the potential energy of atomic hydrogen. The presence of these gaseous ions with thermally dissociated hydrogen formed a plasma having strong VUV emission with a stationary inverted Lyman population. Significant Balmer α line broadening of 18 and 9 eV was observed from a rt-plasma of hydrogen with KNO3, and RbNO3, respectively, compared to 3 eV from a hydrogen microwave plasma. The reaction was exothermic since excess power of about 20 mW/cc was measured by Calvet calorimetry. We propose an energetic catalytic reaction involving a resonance energy transfer between hydrogen atoms and Rb+ or 2K+ to form a very stable novel hydride ion. Its predicted binding energy of 3.0471 eV with the fine structure was observed at 4071 Å, and its predicted bound-free hyperfine structure lines matched those observed for about 40 lines to within.01 percent. Characteristic emission from each catalyst was observed. This catalytic reaction may pump a CW HI laser.

Microwave Plasma Generation of Hydrogen Atoms for Rocket Propulsion

1982 ◽  
Vol 19 (6) ◽  
pp. 579-585 ◽  
Author(s):  
R. Chapman ◽  
J. Filpus ◽  
T. Morin ◽  
R. Snellenberger ◽  
J. Asmussen ◽  
...  
Keyword(s):  
Microwave Plasma ◽  
Hydrogen Atoms ◽  
Rocket Propulsion ◽  
Plasma Generation

Hot hydrogen atoms in a water-vapor microwave plasma source

2009 ◽  
Vol 34 (23) ◽  
pp. 9585-9590 ◽  
Author(s):  
E. Tatarova ◽  
F.M. Dias ◽  
C.M. Ferreira
Keyword(s):  
Water Vapor ◽  
Microwave Plasma ◽  
Plasma Source ◽  
Hydrogen Atoms

Charge-transfer doped intrinsic diamond electrochemical electrodes

2011 ◽  
Vol 1362 ◽  
Author(s):  
Waileong Chen ◽  
Chiuan-Yi Li ◽  
Shoupu Yeh ◽  
Shin-Hung Yei ◽  
Yonhua Tzeng
Keyword(s):  
Aqueous Solution ◽  
Charge Transfer ◽  
Microwave Plasma ◽  
High Current Density ◽  
Diamond Films ◽  
Diamond Surface ◽  
Pure Hydrogen ◽  
Electrochemical Characteristics ◽  
Air Plasma ◽  
Hydrogen Atoms

ABSTRACTWe report electrochemical characteristics of hydrogen terminated charge-transfer doped intrinsic microcrystalline diamond films. Microcrystalline diamond was synthesized by Direct- Current Plasma Enhanced Chemical Vapor Deposition (DC-PECVD) in methane diluted by hydrogen. The diamond films were subjected to further treatment by microwave plasma in pure hydrogen to increase the hydrogen termination of the diamond surfaces and their negative electron affinity. When the diamond is exposed to the ambient moisture, valance electrons tend to tunnel from the first few atomic layers of the diamond surface to the adsorbed water adlayer. This charge transfer process results in the surface of hydrogen-terminated diamond behaving like a p-type semiconductor.Electrochemical characteristics of hydrogen-terminated diamond films were exposed to an air plasma for depleting the surface hydrogen atoms and then re-hydrogenated the same diamond films with atomic hydrogen. Cyclic voltammetry in 0.1M H2S04 aqueous solution and 0.01M Fe(CN)6-4/-3+0.1M KCl aqueous solution was applied to reveal high current density and wide potential window for hydrogen-terminated diamond grown on silicon substrates. The faceted surface morphology has been observed by SEM. The crystalline characteristics and carbon phases in the diamond film were examined by Raman spectroscopy.

Remarks on the diffuse interstellar lines

1967 ◽  
Vol 31 ◽  
pp. 91-93 ◽  
Author(s):  
G. Herzberg
Keyword(s):  
Hydrogen Atoms ◽  
Interstellar Gas

It is suggested that the diffuse interstellar lines are produced in the interstellar gas by molecules consisting of a few hydrogen atoms and one other atom, such as CH4+ or NH4. Diffuseness of the lines is assumed to result from predissociation of these molecules.

Ground State and Excited State H-Atom Temperatures in a Microwave Plasma Diamond Deposition Reactor

1996 ◽  
Vol 6 (9) ◽  
pp. 1167-1180 ◽  
Author(s):  
A. Gicquel ◽  
M. Chenevier ◽  
Y. Breton ◽  
M. Petiau ◽  
J. P. Booth ◽  
...  
Keyword(s):  
Excited State ◽  
Ground State ◽  
Microwave Plasma ◽  
Diamond Deposition

SURFACE PLASMA SOURCE OF HYDROGEN ATOMS WITH AN ENERGY OF HUNDREDS eV

1979 ◽  
Vol 40 (C7) ◽  
pp. C7-479-C7-480 ◽  
Author(s):  
V. G. Dudnikov ◽  
G. I. Fiksel'
Keyword(s):  
Plasma Source ◽  
Surface Plasma ◽  
Hydrogen Atoms
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