Theory of Plasma Wave Absorption

1994 ◽  
pp. 383-436
Author(s):  
P. Mulser
Keyword(s):  
Plasma Wave ◽  
Wave Absorption

Preparation and Properties of Electromagnetic Wave Absorption Materials Ba-TiO3/MWCNT and Derived PAN Hybrid Fibers

2010 ◽  
Vol 25 (8) ◽  
pp. 829-834 ◽  
Author(s):  
Cheng BI ◽  
Mei-Fang ZHU ◽  
Qing-Hong ZHANG ◽  
Yao-Gang LI ◽  
Hong-Zhi WANG
Keyword(s):  
Electromagnetic Wave ◽  
Hybrid Fibers ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption

Ice Plasma Wave Measurements in the Ion Pick-Up Region of Comet Halley

2013 ◽  
pp. 857-860
Author(s):  
F.L. Scarf ◽  
F.V. Coroniti ◽  
C.F. Kennel ◽  
T.R. Sanderson ◽  
K-P Wenzel ◽  
...  
Keyword(s):  
Plasma Wave ◽  
Wave Measurements ◽  
Comet Halley

scholarly journals Physics basis for the ICRF system of the SPARC tokamak

2020 ◽  
Vol 86 (5) ◽  
Author(s):  
Y. Lin ◽  
J. C. Wright ◽  
S. J. Wukitch
Keyword(s):  
Alpha Particles ◽  
Fast Wave ◽  
Vacuum Vessel ◽  
Auxiliary Heating ◽  
Heating Method ◽  
Full Field ◽  
Single Pass ◽  
Wave Absorption ◽  
Port Design ◽  
Icrf Heating

Ion cyclotron range of frequencies (ICRF) heating will be the sole auxiliary heating method on SPARC for both full-field (Bt0 ~ 12 T) D–T operation and reduced field (Bt0 ~ 8 T) D–D operation. Using the fast wave at ~120 MHz, good wave penetration and strong single-pass absorption is expected for D–T(3He), D(3He), D(H) and 4He(H) heating scenarios. The dependences of wave absorption on ${k_\parallel }$ , 3He concentration, resonance location, antenna poloidal location and losses on alpha particles and ash have been studied. The antenna loading has been assessed by comparison with the Alcator C-Mod antennae. An antenna spectrum of ${k_\parallel }\sim 15\text{--}18\,{\textrm{m}^{ - 1}}$ is shown to be good for both core absorption and edge coupling. For the control of impurity sources, the antenna straps are rotated ~10° to be perpendicular to the B field and the straps can run with different power levels in order to optimize the antenna spectrum and to minimize the image current on the antenna frame. Combining the physics constraints with the SPARC port design, maintenance requirement and contingency against antenna failure during D–T operation, we plan to mount on the inner wall of the vacuum vessel a total of 12 4-strap antennae in 6 ports while keeping 3-strap antennae that are insertable and removable on port plugs as the backup option.

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