TF-E modellers meeting B. Gulejova 07/03/2007

TF-E

Goals: * Analyse experimental data from JET

* Setup the SOLPS environment at JET

* Start simulation of preELM phase at JET

SOLPS5 modelling of Type I ELMing

H-mode at JET

TFE modelling meeting 2007

Progress report

TF-E modellers meeting B. Gulejova 07/03/2007

TF-E Type I ELMing H-mode at JET : Discharge parameters

Shot # 69818 (Carbon Ablation)

Dalpha ParametersBt = 2.5 TIp = 2.5 MA ne=4x1019 m-3

ne (dl) = 11x 1019 m-2

Prad(max)=130MWP(NBI)=20 MWP(sol)=14MW

Gas puff

Wdia

PNBI

ne

Ptot Prad

ELM parametersfelm = 5 Hz (First Type I ELMs)Wdia/ΔWELM=5.9/0.7 MJ

GAS PUFF= NO

Ptot Prad

Dalpha

Wdia

D1Z_VSFE_LT configuration

A.Huber

TF-E modellers meeting B. Gulejova 07/03/2007

TF-EData analysis

Upstream profiles : preELM phase

separatrix

nesepm = 2x1019 m-3

ne [m-3]

r-rsep

Te [eV]

CXSETi [eV]

separatrix

- 0.5 - 0.4 - 0.3 - 0.2 - 0.1 0 0.1 0.2

Shift applied to edge LIDAR = 5.2 cm !!!(found experimentally by A. Kallenbach )

Ti and Te in confined region approximately the same~3keV in core ~2keV at the separatrix

*

* * * ** *

** ** * *

ELM

preELM

TF-E modellers meeting B. Gulejova 07/03/2007

TF-ELangmuir probes - divertor

rmid [m]

ne [m-3]ne [m-3]

jsat [A.m-2]

rmid [m]

Inner

Te [eV]Te [eV]

jsat [A.m-2]

outer

1234567

8

Dalpha Dalpha S1

S2

S3A

S3C

S4A

S4B

S4C

S5A

S5B

S5C

S6C

S7C

S8BS8C

S28C

S29A

S29C

S30A

S30C

S33A

S34A

S35A

S36A

S33C

35343330

2829

36

Inner target Outer target

ne [1019m-3]

jsat [105A.m-2]

Te [eV]

TF-E modellers meeting B. Gulejova 07/03/2007

TF-ESOLPS simulation – pre ELM

Inputs (experiment): PSOL = 14 MW ne(sepm) =2x1019 m-3

ΔWELM=0.7 MJ

Inputs (free): from neoclassical + JETTO estimationsD = 0.02 m2.s-1 χi = 0.1 m2.s-1

χe ~ χi /40 = 0.025 m-3.s-1

ΔETB ~ 4cm

Experiment => Ti~Te => Equipartition of energy

But from neoclasical theory => χe < χi !

Decrease power flux of electrons orIncrease power flux of ions in inner core in order to keep Ti~Te

Launched runs:

*B2/Eirene *Standalone

*flat radial profile*TB

*poloidally symetric radial profile*no TB in divertor legs

Mesh: 36x96 cells

Not converged yet Future plans:* Continue in SOLPS runs for preELM * Type I ELM simulation + drifts