Ion energy recovery experiment based on magnetic electro suppression

Technical Report · Thu May 01 00:00:00 EDT 1980

DOI:https://doi.org/10.2172/5401955· OSTI ID:5401955

Kim, J.; Stirling, W. L.; Dagenhart, W. K.; Barber, G. C.; Ponte, N. S.

A proof-of-principle experiment on direct recovery of residual hydrogen ions based on a magnetic electron suppression scheme is described. Ions extracted from a source plasma a few kilovolts above the ground potential (approx. 20 A) are accelerated to 40 keV by a negative potential maintained on a neutralizer gas cell. As the residual ions exit the gas cell, they are deflected from the neutral beam by a magnetic field that also suppresses gas cell electrons and then recovered on a ground-potential surface. Under optimum conditions, a recovery efficiency (the ratio of the net recovered current to the available full-energy ion current) of 80% +- 20% has been obtained. Magnetic suppression of the beam plasma electrons was rather easily achieved; however, handling the fractional-energy ions originating from molecular species (H/sub 2//sup +/ and H/sub 3//sup +/) proved to be extremely important to recovery efficiency.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5401955
• Report Number(s): ORNL/TM-7283; TRN: 80-011075
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
NEUTRAL ATOM BEAM INJECTION
DIRECT ENERGY CONVERSION
BEAM CURRENTS
EFFICIENCY
ELECTRONS
HYDROGEN IONS
ION SOURCES
NEUTRAL BEAM SOURCES
BEAM INJECTION
CHARGED PARTICLES
CONVERSION
CURRENTS
ELEMENTARY PARTICLES
ENERGY CONVERSION
FERMIONS
IONS
LEPTONS
700104* - Fusion Energy- Plasma Research- Plasma Kinetics-Experimental- (-1987)