Dissociative recombination coefficient for low temperature equilibrium cesium plasma

2002 ◽  
Vol 92 (2) ◽  
pp. 690-697 ◽  
Author(s):  
Yoichi Momozaki ◽  
Mohamed S. El-Genk
Keyword(s):  
Low Temperature ◽  
Dissociative Recombination ◽  
Recombination Coefficient ◽  
Temperature Equilibrium ◽  
Cesium Plasma

scholarly journals Low Temperature Dielectronic Recombination Coefficients for Ions of C, N and O

1983 ◽  
Vol 103 ◽  
pp. 513-514
Author(s):  
H. Nussbaumer ◽  
P.J. Storey
Keyword(s):  
Low Temperature ◽  
Electron Temperature ◽  
General Formula ◽  
Dielectronic Recombination ◽  
Simple Function ◽  
Recombination Coefficient ◽  
Temperature Range

Dielectronic recombination coefficients have been calculated for some ions of C, N and O by Storey (1981, Mon. Not. R. astr. Soc., 195, 27P). Using the same approach, we have extended those calculations to all other ions of C, N and O for which a dielectronic contribution to the total recombination coefficient might be expected at nebular temperatures. Recombination coefficients have been calculated in the temperature range from 5000 K up to the temperature at which the Burgess general formula becomes valid. The total dielectronic recombination coefficients are fitted to a simple function of the electron temperature.

scholarly journals 18. A note on the head echo problem

1968 ◽  
Vol 33 ◽  
pp. 187-189 ◽  
Author(s):  
J. Rajchl
Keyword(s):  
Cross Sections ◽  
Dissociative Recombination ◽  
Molecular Flow ◽  
Recombination Coefficient ◽  
Interaction Layer ◽  
Atmospheric Molecules ◽  
A Value ◽  
The Mean ◽  
Head Echo ◽  
Absolute Magnitudes

A model of the head echo is examined, in which, as a source of ionization and recombination, an interaction layer of impinging atmospheric molecules (O2) mixing with reflected ones is assumed. Dissociative recombination is considered as the most probable process. If we suppose that the interaction layer is that arising in nearly free molecular flow with no shock wave present, we obtain, using the observed heights of head echoes, dimensions of meteoroids in the range 10–1 cm for absolute magnitudes between −10 and −2. It is shown that such a layer may be used to explain the high initial recombination coefficient of the order of 10−5 cm3/sec. Using the ionization collision cross-sections measured by Utterback (1963) we obtain for the mean extent of the interaction layer a value 1–100 m for heights 80–130 km, in accordance with radar observations.

Device for Generating a Low Temperature, Highly Ionized Cesium Plasma

1960 ◽  
Vol 31 (12) ◽  
pp. 1326-1333 ◽  
Author(s):  
Nathan Rynn ◽  
Nicola D'Angelo
Keyword(s):  
Low Temperature ◽  
Cesium Plasma

ELECTRICAL AND OPTICAL STUDIES OF THE ARGON PLASMA JET

1963 ◽  
Vol 41 (9) ◽  
pp. 1405-1419 ◽  
Author(s):  
M. D. Watson ◽  
H. I. S. Ferguson ◽  
R. W. Nicholls
Keyword(s):  
Argon Plasma ◽  
Dissociative Recombination ◽  
Plasma Jet ◽  
Ambipolar Diffusion ◽  
Recombination Coefficient ◽  
Physical Processes ◽  
Optical Studies ◽  
Degree Of Ionization ◽  
Preliminary Study ◽  
Argon Plasma Jet

A preliminary study has been made of the physical processes occurring in an argon plasma jet flowing at Mach 2.5. Axial electron and ion temperatures and densities were measured as functions of distance along the jet, using spectroscopic and electrical probe techniques. Estimates were also made of the degree of ionization, the electron–ion recombination coefficient, and the ambipolar diffusion coefficient. It was found that electron temperatures (~4000° K) were about twice as large as the effective rotational temperatures of N2 molecules (~1500° K) and thus of ion temperatures. Electron densities were ~1012 cm−3. The degree of ionization was ~6 × 10−4. The dominant mechanism for deionization was found to be dissociative recombination (between electrons and A2+ ions) over the first 8 cm of the jet, after which ambipolar diffusion appeared to become important.

Sign in / Sign up

Export Citation Format

Share Document