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Design of RF Systems for the RTD Mission VASIMR

Description: The first flight test of the variable specific impulse magnetoplasma rocket (VASIMR) is tentatively scheduled for the Radiation and Technology Demonstration (RTD) in 2003. This mission to map the radiation environment out to several earth radii will employ both a Hall thruster and a VASIMR during its six months duration, beginning from low earth orbit. The mission will be powered by a solar array providing 12 kW of direct current electricity at 50 V. The VASIMR utilizes radiofrequency (RF) powe… more
Date: April 12, 1999
Creator: Baity, F. W.; Barber, G. C.; Carter, M. D.; Chang-Diaz, F. R.; Goulding, R. H.; McCaskill, G. E. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Recent Results from a Folded Waveguide ICRF Antenna Development Project

Description: Preliminary high power tests have been performed on a folded waveguide (FWG) ICRF launcher with a curved coupling faceplate installed. Two alternative faceplate configurations have been built and tested at low power and will be tested at high power in the near future. The new designs include a dipole plate which provides a 0-<font face="symbol">p</font> launch spectrum and a more transparent, flexible monopole face plate configuration. This FWG design is a 12 vane, 57 MHz design with a 0.31 m s… more
Date: April 12, 1999
Creator: Baity, F. W.; Barber, G. C.; Bigelow, T. S.; Carter, M. D.; Fadnek, A.; Ryan, P. M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Experiments on Ion Cyclotron Damping at the Deuterium Fourth Harmonic in DIII-D

Description: Absorption of fast Alfven waves by the energetic ions of an injected beam is evaluated in the DIII-D tokamak. Ion cyclotron resonance absorption at the fourth harmonic of the deuteron cyclotron frequency is observed with deuterium neutral beam injection (f = 60 MHz, B{sub T} = 1.9 T). Enhanced D-D neutron rates are evidence of absorption at the Doppler-shifted cyclotron resonance. Characteristics of global energy confinement provide further proof of substantial beam acceleration by the rf. In m… more
Date: May 1, 1999
Creator: Pinsker, R. I.; Petty, C. C.; Baity, F. W.; Bernabei, S.; Greenough, N.; Heidbrink, W. W. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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