XMP49: Assessment of TESPEL penetration in NSTX

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XMP49: Assessment of TESPEL penetration in NSTX

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Cartridge (sabot, see below) style injector. TESPEL has been loaded into. a sabot (I.D. ~ 2.0 mm) 10 200 m/s radial injection ... – PowerPoint PPT presentation

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Title: XMP49: Assessment of TESPEL penetration in NSTX

1
XMP49Assessment of TESPEL penetration in NSTX

N. Tamura, H. Funaba, K. Sato, S. Sudo, NIFSK.
Tritz, D. Stutman, L. F. Delgado-Aparicio,M.
Finkental, JHUH. Kugel, R. Kaita, L. Roquemore,
M. Bell, PPPLV. Soukhanovskii, LLNL

2
Goals Achievements

Goals
Assess TESPEL penetration and its perturbative
effects on NSTX plasmas, allowing for future
dedicated studies of impurity/heat transport
Achivements
LiH-TESPEL type-D has been successfully injected
into NSTX plasmas in collaboration with PPPL and
JHU again
A larger TESPEL (f1.0 mm, f1.5 mm) can penetrate
intoa high-power(6MW) and density H-mode NSTX
plasmas
f1.0 mm TESPEL penetrates to the core

3
Experimental Apparatus on NSTX

In order to inject a TESPEL into a NSTX plasma, a
existing Lithium Pellet Injector (LPI) has been
used.

Cartridge (sabot, see below) style injector
TESPEL has been loaded intoa sabot (I.D. 2.0
mm)
10 200 m/s radial injection

TESPEL for NSTX plasmas consists of deuterated
polystyrene (CD) as a shell of that and LiH as a
tracer.

4
f1.0mm TESPEL injection into 6MW H-mode NSTX
plasma
5
Impact of f1.0mm TESPEL injection on profiles of
ne and Te in 6MW H-mode NSTX plasma
6
f1.0mm TESPEL penetration into the 6MW H-mode
plasmais also confirmed by a fast camera data
119664 f0.5mm TESPEL,t 0.453889 0.455889
s,duration 2.111 ms,dt 111.11 ms
122952 f1.0mm TESPEL,t 0.452519 0.455284
s,duration 2.790 ms,dt 24.69 ms
7
Summary Future plans

Summary
LiH-TESPEL type-D has been successfully injected
into NSTX plasmas in collaboration with PPPL and
JHU again
A larger TESPEL (f1.0 mm, f1.5 mm) can penetrate
into a high-power(6MW) and density H-mode NSTX
plasmas
This is confirmed by various diagnostics, fast
cameras, filterscopes, USXR, tOSXR, as well as
MPTS, CHERS and tangential bolometer
Future plans
Develop the Z-scaling study of impurity transport
in NSTX with TESPEL
Comparison of impurity/electron heat transport
in between helical plasmas and ST plasmas will
be proposed, if possible