Improved rf plasma jet generation of singlet delta oxygen

Josef Schmiedberger; Sanyo Takahashi; Hiroo Fujii

doi:10.1117/12.270166

4 April 1997 Improved rf plasma jet generation of singlet delta oxygen

Josef Schmiedberger, Sanyo Takahashi, Hiroo Fujii

Proceedings Volume 3092, XI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference; (1997) https://doi.org/10.1117/12.270166
Event: XI International Symposium on Gas Flow and Chemical Lasers and High Power Laser Conference, 1996, Edinburgh, United Kingdom

Abstract

Rf oxygen plasma jets were studied experimentally as an alternative source of molecular singlet delta oxygen for an oxygen-iodine laser. The relative yield of singlet delta oxygen was measured under a wide variety of experimental conditions. The rf frequency range was 27.2 - 99.9 MHz and the rf power was up to 200 W. The oxygen output pressure was 0.05 - 0.40 torr and the oxygen flow rate was 195 - 1000 sccm. High purity oxygen or its mixtures with Ar, N₂, NO and Hg at the pumping velocity of 250 m³/h were used. The plasma jet was produced in nozzles, having the inner diameter of 1 - 6 mm and the length of 1 - 16 mm. The nozzle materials Al, Ti, Ta and W gave significantly better results than Pt and Ni. The dependence of singlet delta oxygen production on the radiofrequency was increasing monotonously. Other dependencies were not monotonous and exhibited an optimum. The cw mode of operation gave usually better results than a pulsed mode. The most effective admixture was N₂, which gave the highest enhancement. This resulted in the relative yield of singlet delta oxygen exceeding 15%.

Citation Download Citation

Josef Schmiedberger, Sanyo Takahashi, and Hiroo Fujii "Improved rf plasma jet generation of singlet delta oxygen", Proc. SPIE 3092, XI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference, (4 April 1997); https://doi.org/10.1117/12.270166

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available