Hhfw heating into reversed shear plasmas
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HHFW Heating into Reversed-shear Plasmas. Experimental Proposal for NSTX 2005 Run B.P. LeBlanc and usual suspects Princeton, August 18, 2005. HHFW Heating into Reversed-shear Plasmas. Goal of experiment Apply HHFW power to reversed-shear (RS) scenario

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Hhfw heating into reversed shear plasmas

HHFW Heating into Reversed-shear Plasmas

Experimental Proposal for NSTX 2005 Run

B.P. LeBlanc and usual suspects

Princeton, August 18, 2005

1


Hhfw heating into reversed shear plasmas1
HHFW Heating into Reversed-shear Plasmas

  • Goal of experiment

    • Apply HHFW power to reversed-shear (RS) scenario

    • Learn about HHFW electron heating under RS condition

    • Compare HHFW to NBI heating

    • Study electron thermal transport

  • Need to

    • Develop target plasma from discharges created for XP-522, e.g. 116978

2


Develop target plasma
Develop Target Plasma

  • Base shot is 116978, DND, L-mode

  • Some development is needed

    • Need rtEFIT control

      • hand shake  0.2 s (Ip flattop start)

    • Shift plasma out  4 cm in order to achieve 4-cm gap

    • Use CS flueling

    • Will need about 3 shots to get there

    • RF camera to ascertain plasma interaction

3



116878 is dnd but need to a bring gap to 4 cm b use cs fueling
116878 is DND, but need to(a) bring gap to  4 cm; (b) use CS fueling

5



Time blocs hhfw in presence of fast ions
Time BlocsHHFW in presence of fast ions

7


Time blocs hhfw in absence of fast ions
Time BlocsHHFW in “absence” of fast ions

8


Need shot to last until 0 5 s may need to lower i p and or increase n e as in 116978
Need Shot to Last Until 0.5 sMay need to lower Ip and/or increase ne as in 116978

9


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