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|FEATURED STORIES - FEBRUARY 2017|
The results of an experimental study of the S-band magnetron operation with a six-vane anode block and multichannel radial outputs for microwave power extraction are presented. The magnetron was driven by a linear induction accelerator (∼350 kV, ∼2.5 kA, and 150 ns). In the case of three outputs for microwave power extraction and another three outputs connected to waveguides short circuited by movable plungers for adjusting the magnetron resonance, frequency-stable generation of the microwaves radiation with a total power of 570 MW from these three outputs was demonstrated. This power was equal to the power obtained when the same magnetron with one output was operated with high efficiency (≥40%). more...
Spacecraft exposed dielectric interacts directly with the ambient plasma and may be faced with energetic electron irradiation. Using the charging model surface and internal coupling charging model for spacecraft exposed dielectric (SICCE), it is possible to investigate this special charging process, including both surface charging (SC) and deep dielectric charging. Based on the finite-difference time-domain method, a transient solution of the SICCE in the 1-D case is proposed in this paper with adequate verifications. An important improvement is made to the SICCE by employing secondary electron yield formula in Katz form, which is the same with Spacecraft Plasma Interaction Software (SPIS) and NASA Charging Analyzer Program (NASCAP)−2k. The typical charging environment for exposed dielectric is assumed Geosynchronous Earth Orbit (GEO) worst plasma environment combined with Flumic3 energetic electron irradiation. more...
A PUBLICATION OF THE IEEE NUCLEAR AND PLASMA SCIENCES SOCIETY
|FEBUARY 2017 | VOLUME 45 | NUMBER 2 | ITPSBD | (ISSN 0093-3813)|
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