Zobrazeno 1 - 10
of 15
pro vyhledávání: '"C. F. A. van Os"'
Publikováno v:
Journal of Applied Physics. 69:3485-3493
The production of H− ions at a barium, magnesium, strontium, molybdenum, and lanthanum‐hexaboride converter immersed in a hydrogen plasma have been investigated for pulsed and dc discharges. The scaling of the negative‐ion output with incident
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b5c1b6549537f4c16202cd1c12c894d4
https://doi.org/10.1063/1.348489
https://doi.org/10.1063/1.348489
Autor:
C. F. Chan, Wulf B. Kunkel, W. F. Steele, Russell Wells, C. F. A. van Os, Ka-Ngo Leung, M. D. Williams, G. J. deVries, A. F. Lietzke, O. A. Anderson, J.W. Kwan, W. S. Cooper
Publikováno v:
Review of Scientific Instruments. 63:2705-2707
A D− surface‐conversion source using a solid barium converter is designed for steady‐state operation to produce 200 mA of D−. A similar ion source of twice the size as the one discussed here will meet the requirements set by the present US‐
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::56d23609271af1c439c5bd157d4dbaeb
https://doi.org/10.1063/1.1142829
https://doi.org/10.1063/1.1142829
Publikováno v:
Applied Physics Letters. 58:1467-1469
It has been demonstrated that the H− output current from a small multicusp source can be substantially enhanced if the hydrogen plasma is seeded with barium. Operating with a barium washer insert at the extraction aperture, it is found that the ext
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d101e6a912d59758ddeb98724bd2a623
https://doi.org/10.1063/1.105199
https://doi.org/10.1063/1.105199
Publikováno v:
Applied Physics Letters. 57:861-863
The production of H− ions at a barium converter immersed in a hydrogen plasma has been investigated experimentally for a pulsed discharge. It is found that the scaling of the negative ion output with incident positive ion current on the converter d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a72e12469063cf1932ef71c3df03042e
https://doi.org/10.1063/1.103389
https://doi.org/10.1063/1.103389
Autor:
Brian N. Chapman, C. F. A. van Os
Publikováno v:
SPIE Proceedings.
This paper will briefly describe the theory of interferometry, and then detail the method, apparatus and preliminary results of experiments with the Tempest. Infrared laser interferometry is a well known technique for measuring layer thickness based
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c85f61f7cafde6dbd39abbd4a0818a66
https://doi.org/10.1117/12.56657
https://doi.org/10.1117/12.56657
Publikováno v:
AIP Conference Proceedings.
Recent results of surface produced negative ions are presented. Two low work function metal surfaces have been studied, barium and magnesium, in combination with several plasma generators; RF‐ and DC‐filament discharges. The negative ion yield fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2eeff6d2715fbf5f58ecf43b4b9e0afc
https://doi.org/10.1063/1.39588
https://doi.org/10.1063/1.39588
Publikováno v:
Review of Scientific Instruments. 62:3098-3099
Ion sources can be damaged by arcs between metallic components of the source if these arcs are permitted to last. The negative‐biased low‐work‐function converter in a surface conversion negative ion source is especially susceptible to metal‐a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d9e88e9888d32428c94e684b4689a4aa
https://doi.org/10.1063/1.1142160
https://doi.org/10.1063/1.1142160
Publikováno v:
Europhysics Letters (EPL). 10:715-719
Measurements on the formation of O- and C- by scattering a positive-ion beam from a cesiated (0.6 ML) W(110) surface are presented. The results, 66% of O- and 33% of C-, respectively, in the outgoing beam, are interpreted by means of a strong anisotr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aab911e2aa04b7b98d7d6cdd323d6a0f
https://doi.org/10.1209/0295-5075/10/8/003
https://doi.org/10.1209/0295-5075/10/8/003
Publikováno v:
Journal of Applied Physics. 64:3863-3873
A fundamental study of the formation of negative hydrogen ions via surface conversion is presented. Employed is a novel type of converter, namely a pure barium metal surface. In spite of the high work function of barium compared to more conventional
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b492d9fe341da8cac37d306386e44fc
https://doi.org/10.1063/1.341340
https://doi.org/10.1063/1.341340
Publikováno v:
Review of Scientific Instruments. 60:539-546
An experimental study on the production of negative ions at a pure barium surface mounted in a multicusp bucket source is presented. The conversion efficiency, i.e., the ratio of the extracted negative‐ion current and the positive‐ion current inc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b7fead1077d8fc1e457d407a25d049c
https://doi.org/10.1063/1.1140360
https://doi.org/10.1063/1.1140360