Zobrazeno 1 - 10
of 20
pro vyhledávání: '"A. F. Lietzke"'
Autor:
A. F. Lietzke, P. Purgalis, Ka-Ngo Leung, C. A. Hauck, Russell Wells, O. A. Anderson, J.W. Kwan, G. J. deVries, W. S. Cooper, Wulf B. Kunkel, C. F. Chan
Publikováno v:
Review of Scientific Instruments. 61:2378-2382
Based on recent experimental results made on the large and small multicusp volume H− sources, a new multicusp source has been designed to generate high‐brightness H− or D− beams for high duty factor or dc operations. Cesium will be introduced
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::07885fa9b7dbd8f78d505a8f764995d9
https://doi.org/10.1063/1.1141367
https://doi.org/10.1063/1.1141367
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
Autor:
O. A. Anderson, J.W. Kwan, Ka-Ngo Leung, C. F. Chan, A. F. Lietzke, W. F. Steele, W. S. Cooper, G. D. Ackerman, G. J. deVries
Publikováno v:
Review of Scientific Instruments. 61:369-371
In testing a multicusp volume‐production H− ion source (20 cm diameter, 23 cm long), we optimized the gas pressure, the plasma electrode bias potential, and the magnetic filter. At the optimum pressure of 9 mTorr, the H− beam output increased l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c79c50dee47a80a223bf59e26e57ad9d
https://doi.org/10.1063/1.1141296
https://doi.org/10.1063/1.1141296
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:
Review of Scientific Instruments. 59:453-456
High‐quality H− beams have been generated from a multicusp source equipped with a permanent magnet filter. It is shown that a large improvement in H− yield can be achieved by employing a small multicusp source, fabricated with the proper wall m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f8254fd6837dd73869a1f19ca807fa15
https://doi.org/10.1063/1.1139859
https://doi.org/10.1063/1.1139859
Publikováno v:
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 1:1861-1867
The first year of operation of Doublet III, a large noncircular tokamak (R=1.43 m, a=0.45 m, BT ≤2.6 T), was highlighted by the achievement of a plasma current in excess of 2 MA. This is partially attributed to the low Zeff discharges made possible
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d7ad029798e00d8db1a27fbb40f6bd23
https://doi.org/10.1116/1.572229
https://doi.org/10.1116/1.572229
Autor:
J.F. Baur, S. J. Adcock, Nobuyoshi Ohyabu, R.K. Fisher, J.M. Lohr, Stewart C. Prager, J. M. Rawls, T. H. Jensen, V. Vanek, T. S. Wang, Teruo Tamano, K. Matsuda, C.P. Moeller, Tihiro Ohkawa, N.H. Brooks, M.A. Mahdavi, F. J. Helton, William C. Guss, A. F. Lietzke, J.C. DeBoo, R. L. Freeman, C. L. Hsieh
Publikováno v:
Physical Review Letters. 39:622-625
Doublet plasma have been produced in Doublet IIA using an active field-shaping coil system. Significant increases in the electron density and energy confinement time have been observed for the doublet configuration relative to elliptic and circular p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0190bf958a1645807f4d4fb2f348086d
https://doi.org/10.1103/physrevlett.39.622
https://doi.org/10.1103/physrevlett.39.622
Autor:
W. S. Cooper, G. J. deVries, W. F. Steele, L. Soroka, O. A. Anderson, G. D. Ackerman, C. F. Chan, A. F. Lietzke, J.W. Kwan
Publikováno v:
Review of Scientific Instruments. 57:831-839
The design and operation of the surface‐conversion H− ion source and the 80‐keV preaccelerator are discussed. Both the source and the preaccelerator, together with the transverse field focusing (TFF) matching and pumping beam transport section
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::093bdb486c968c48ca2063d2d7e9e948
https://doi.org/10.1063/1.1138820
https://doi.org/10.1063/1.1138820
Publikováno v:
IEEE Transactions on Plasma Science. 6:107-120
A new diagnostic technique, based on elastic scattering of neutral atoms off the plasma ions, is proposed and analyzed. Space and time resolved measurements of the number densities and temperatures of the various components of the plasma are possible
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d8a5e74c6be025299fc22cbdd2b5b08e
https://doi.org/10.1109/tps.1978.4317101
https://doi.org/10.1109/tps.1978.4317101