1 / 3

Proposal #3: Expand ITER rampdown cases

Proposal #3: Expand ITER rampdown cases. C. Kessel, PPPL. Remaining in H-mode Keep power as high as possible, for as long as possible in rampdown Step downs in power with H-L-H transitions Find power where full back transition occurs, H-L

vida
Download Presentation

Proposal #3: Expand ITER rampdown cases

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Proposal #3: Expand ITER rampdown cases C. Kessel, PPPL • Remaining in H-mode • Keep power as high as possible, for as long as possible in rampdown • Step downs in power with H-L-H transitions • Find power where full back transition occurs, H-L • Ideally control density drop at different rates (probably not possible in H-mode) • H/L-mode combined rampdowns, varying transition time • Vary dIp/dt • Vary dn/dt • L-mode rampdowns (power to zero at end of flattop) • Vary dIp/dt • Vary dn/dt • Explore vertical instability saturation of growth rate with rising li • Plasmas diverted for all rampdowns, kappa reduction • Explore fixed strike points, with and without good plasma match to midplane

  2. Examine H-L-H “step down” in density with Ip and PICRF rampdown ICRF drops from 4 to 2 MW

  3. ITER rampdown issues: • n(t) • H or L-mode • Vertical stability • Strike points/midplane coupling • Remain diverted to very low Ip

More Related