Time-of-Flight Investigations of Electron Transport in Gases
Electron swarm experiments may be arranged to satisfy the boundary conditions applicable to a one-dimensional time-dependent transport equation. Under such conditions it may be shown that the distribution of the time-of- arrival of individual electrons at a point on a plane which is L cm from another plane releasing electrons at time t = 0 may be interpreted in terms of the diffusion coefficient D and the drift velocity w. The integrals of the distribution functions, i.e., the total numbers of electrons arriving, before and after the addition of an attaching gas, are directly related to the attachment coefficient, BETA . Since, in such experiments, time is a more accessible independent variable than is length, it is not surprising that much more information on the basic character of electron transport in gases is obtained than can be obtained from a Townsend experiment. Results for values of D, and w as a function of E/P are given for C2H4 and CO2.
- Research Organization:
- Oak Ridge National Lab., Tenn.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-17-036595
- OSTI ID:
- 4633125
- Journal Information:
- Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 5 Vol. 39; ISSN JCPSA6; ISSN 0021-9606
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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