Limiting field strength and electron swarm coefficients of the CF 3 I–SF 6 gas mixture
We have measured the electron drift velocity, longitudinal diffusion, and the effective ionization coefficients in the gaseous mixture of CF 3 I–SF 6 over the density-normalized electric field intensity E / N , from 375 to 500 Td (1 Td = 10 −17 V cm 2 ). A pulsed Townsend technique was used. Overal...
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Published in | Journal of physics. D, Applied physics Vol. 44; no. 34; p. 342001 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
31.08.2011
|
Online Access | Get full text |
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Summary: | We have measured the electron drift velocity, longitudinal diffusion, and the effective ionization coefficients in the gaseous mixture of CF
3
I–SF
6
over the density-normalized electric field intensity
E
/
N
, from 375 to 500 Td (1 Td = 10
−17
V cm
2
). A pulsed Townsend technique was used. Overall, the gas mixture compositions were varied from 50 to 90% CF
3
I. We have found that the limiting field strength
E
/
N
lim
of the CF
3
I–SF
6
mixture is superior to that of CF
3
I–N
2
, and always higher than that of SF
6
. Moreover, over the whole mixture range, the range of the limiting field strength for the CF
3
I–SF
6
mixture is 360–437 Td, these limits corresponding for pure SF
6
and CF
3
I, respectively. |
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ISSN: | 0022-3727 1361-6463 |
DOI: | 10.1088/0022-3727/44/34/342001 |