TRANSP 2409


Run Information

Run Time: t=0.14-1.0s
ICRF Module: FPPRF (New nl Controls)
ICRF Power: 3MW @80MHz (Simulated)
ICRF Duration: 0.14-1.0s
LH Module: LSC
LH Power: 1.65MW @n0=2.75
LH Duration:0.15-1.0s
Density Profile: Artificial density barrier r/a=0.4, d=5cm *1.5
Chi Modification: Yes, NKEMOD = 0, -2; TKEMOD = 0.2;
NLXEIN=.T; XKEMIN=1.e3; XKEMAX=3.e4; NKIMODA= 6, 0;
TKIMOD= 0.2
Noteworthy Switches: NZONES=60, LEVGEO=6(VMEC6),
QLIM0=15.0, NBOOSM=1, NJSMBOOT=0, NJSMLH=4,
NRAYSLH=30,hLH=0.002,DTMAXG=0.002


Comments:

This is actually quite interesting. The LH is turned off at 0.5s, so the LHCD just goes away. The Ohmic almost automatically replaces the lost current. Ohmic then increases and penetrates in and the bootstrap decreases. LHCD seems crucial for making RS and keeping the bootstrap current high. Re-run with higher resolution and no LH smoothing. For more information about the run see the input namelist.


The image below plots the total current vs time.

Integrated Current with Central Density
Legend:
Total Current: 		White
Lower Hybrid: 		Red
Ohmic Current: 		Green
Bootstrap Current: 	Blue

The figure below shows the actual power spectrum from the TRANSP output.
Power Spectrum