4 Matching Results

Search Results

Advanced search parameters have been applied.

OPTIMIZED SYSTEM FOR D- PRODUCTION FROM CHARGE EXCHANGE IN ALKALI METALS

Description: Negative ion production for neutral (deuteron) beam injectors is considered for a general system utilizing charge-exchange production in alkali metals. Experimental results provide parameters and show good correlation with calculations using known atomic cross sections, so that beam behavior can be predicted. It is found that coupling into the high voltage accelerator poses significant constraints on optimization of the system, e.g., to determine its minimum size. A typical design for 200-keV final energy provides D{sup -} at 1.5 keV from charge-exchange in rubidium, with an average current density of 23 mA/cm{sup 2} and a total current of 20 A.
Date: August 1, 1980
Creator: Hooper Jr., E.B.; Poulsen, P. & Anderson, O.A.
Partner: UNT Libraries Government Documents Department

STATUS OF THE LBL/LLL DEVELOPMENT PROGRAM

Description: The status and near-term goals of the LBL/LLL neutral-beam-development program are described. The emphasis in this paper is on the technology of systems based on the acceleration and neutralization of positive ions; this approach will be used in the near term, probably through 1985 at least. For more efficient injection, part of our plan is to develop a negative-ion approach suitable for 200- to 400-kV injectors on confinement experiments in the 1985-90 period. However, the negative-ion based program is still very much in the research phase, and it is difficult to project how it will phase into fusion reactor fueling experiments.
Date: November 1, 1977
Creator: Berkner, K.H.; Berkner, K.H.; Ehlers, K.W.; Pyle, R.V. & Hooper Jr., E.B.
Partner: UNT Libraries Government Documents Department

HIGH CURRENT SOURCE OF He IONS

Description: A negative helium ion beam of 70 mA at 10.5 kV has been produced by charge exchange in sodium. The production is studied as a function of sodium line density, beam energy and background helium gas density. The characteristics of this high current He{sup -} source are analyzed to determine the design requirements for He{sup -} beam generation in the range of tens to hundred of milliamperes.
Date: March 1, 1980
Creator: Hooper, Jr., E.B.; Pincosy, P.A.; Poulsen, P.; Burrell, C.F.; Grisham, L.R. & Post, D.E.
Partner: UNT Libraries Government Documents Department