“Whoa! It’s like Spotify but for academic articles.”

Instant Access to Thousands of Journals for just $40/month

Try 2 weeks free now

Studies of total ionization in gases/mixtures of interest to pulsed power applications



The energy required to produce an electron‐ion pair (i.p.), W , for the α‐particle irradiated gases CF 4 , C 2 F 6 , C 3 F 8 , and n ‐C 4 F 1 0 has been measured and found to be 34.3, 34.5, 34.4, and 34.2 eV/ i.p., respectively. The large values of W for these perfluorocarbons (PFCs) are attributed to their large cross sections for electron impact‐induced dissociation. The constancy of W for this group of molecules is discussed with respect to the constancy of the ratio (∼0.68) of the respective (energy integrated) total ionization cross section to the total (energy integrated) inelastic scattering cross section. W values are also reported for the binary gas mixtures Ar/CF 4 , Ar/C 2 F 6 , Ar/C 3 F 8 , and CH 4 /CF 4 which have conduction and insulation properties suitable for use in diffuse discharge opening switches. The W values for these binary mixtures (and for C 2 H 2 /CF 4 , C 2 H 2 /C 2 F 6 , and C 2 H 2 /C 3 F 8 ) increase with the amount of PFCs in the mixture and (contrary to the Ar/C 2 H 2 mixture) exhibit no Jesse effect. The ternary gas mixtures Ar/C 2 H 2 /PFC (=CF 4 , C 2 F 6 , C 3 F 8 ) containing ≲10% PFC were found to exhibit a pronounced Jesse effect which is a function of the content of the PFC in the mixture and the electron scattering cross section of the PFC itself. Substantial increases in ionization can be achieved by adding to the Ar/PFC binaries 1–3% of C 2 H 2 . An analysis of the W data yielded information on the partition of the α particle’s energy among the gas components and indicated that the rate constant for energy transfer from excited argon atoms (Ar∗) to the PFC is smaller than that from Ar∗ to C 2 H 2 ; it showed, also, that the rate constant for energy transfer from Ar∗ to C 2 H 2 is ∼10 4 larger than that for collisional deexcitation of Ar∗ by ground‐state Ar atoms. The quantitative measurements reported herewith and the parameters deduced from a simple modeling of the data permit the tailoring of ternary gas mixtures with substantial current increases over those achieved in the binary Ar/PFC (=CF 4 , C 2 F 6 , C 3 F 8 ) mixtures which possess the desirable conduction and insulation characteristics for pulsed power opening switches.



Journal of Applied PhysicsAmerican Institute of Physics

Published: Jul 15, 1986


DOI: 10.1063/1.337792

Free Preview of First Page

Loading next page...

You’re reading a free preview. Subscribe to read the entire article.

DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy unlimited access and
personalized recommendations from
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $40/month

Try 2 weeks free now

Explore the DeepDyve Library

How DeepDyve Works

Spend time researching, not time worrying you’re buying articles that might not be useful.

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from Springer, Elsevier, Nature, IEEE, Wiley-Blackwell and more.

All the latest content is available, no embargo periods.

See the journals in your area

Simple and Affordable Pricing

14-day free trial. Cancel anytime, with a 30-day money-back guarantee.

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches


Best Deal — 25% off

Annual Plan

  • All the features of the Professional Plan, but for 25% off!
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.

billed annually