current drive with rapid start up at high resistivity n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Current Drive with Rapid Start-up at High Resistivity PowerPoint Presentation
Download Presentation
Current Drive with Rapid Start-up at High Resistivity

Loading in 2 Seconds...

play fullscreen
1 / 2

Current Drive with Rapid Start-up at High Resistivity - PowerPoint PPT Presentation


  • 66 Views
  • Uploaded on

Nat Fisch and Hong Qin. J.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

Current Drive with Rapid Start-up at High Resistivity


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
current drive with rapid start up at high resistivity

Nat Fisch and Hong Qin

J

By injecting LHCD in a low-density, low-Te, high resistivity plasma, and then relaxing and densifying in a high-n, high-Te,low resistivity plasma, an order-of-magnitude savings on circulating LH power might be had as well as the opportunity to inject the LHW at low density. In addition, the flow drive during rapid start up may exhibit unusual features due to the large Ohmic counter-current accompanying the large LH-induced current (perhaps the flow effects are additive)

PIC

PLH

Current Drive with Rapid Start-up at High Resistivity

ne

Z=1

t

optimizing current drive efficiency
Optimizing Current Drive Efficiency

Note: factors are multiplicative, so get factor of say several in high-Z or low Te (high resistivity), including and further factor of several in low-n. The higher peak power required is balanced by the higher current drive efficiency to the extent that low-n is utilized. Also, note that LHCD more realistic at low-n.

N. J. Fisch, J. Plasma Physics 76, 627 (2010)