H[sup]-[/sup] Formation Via Surface Conversion At A Barium Converter In A High Power DC Environment

C. F. A. van Os; C. Leguijt; R. M. A. Heeren; J. Los; A. W. Kleyn

doi:10.1117/12.951841

25 July 1989 H^- Formation Via Surface Conversion At A Barium Converter In A High Power DC Environment

C. F. A. van Os, C. Leguijt, R. M. A. Heeren, J. Los, A. W. Kleyn

Proceedings Volume 1061, Microwave and Particle Beam Sources and Directed Energy Concepts; (1989) https://doi.org/10.1117/12.951841
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

Experiments on the production of negative hydrogen ions via surface conversion for incident positive hydrogen ion currents in the range of 0.2 to 1 A/cm2 are reported. The conversion efficiency, i.e. the ratio of the produced negative ion current and the positive ion current on the converter shows a strong temperature dependence and has a maximum for a positive ion current density of about 0.5 A/cm2. Due to the limited magnetic confinement of the intense hydrogen plasma, the base pressure of these experiments was of the order of 50 mTorr which resulted in very large losses of negative ions due to stripping. With correction for these losses, we obtained a conversion efficiency, of the order of 8 percent which corresponds to a surface produced negative ion current density of the order of 60 mA/cmh.

Citation Download Citation

C. F. A. van Os, C. Leguijt, R. M. A. Heeren, J. Los, and A. W. Kleyn "H^- Formation Via Surface Conversion At A Barium Converter In A High Power DC Environment", Proc. SPIE 1061, Microwave and Particle Beam Sources and Directed Energy Concepts, (25 July 1989); https://doi.org/10.1117/12.951841

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