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Euratom. TORE SUPRA. REAL TIME ECE ELECTRON TEMPERATURE PROFILE MEASUREMENTS ON THE TORE - SUPRA TOKAMAK J. L S é gui , D. Molina , F.Saint-Laurent, N.Ravenel , G.Caulier, M.Goniche,D.Mazon DRFC, CEA-Cadarache, Association CEA-Euratom, 13108 Saint-Paul-lez-Durance, France. - PowerPoint PPT PresentationTRANSCRIPT
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REAL TIME ECE ELECTRON TEMPERATURE PROFILE
MEASUREMENTS ON THE TORE-SUPRA TOKAMAK
J.L Ségui, D. Molina, F.Saint-Laurent, N.Ravenel, G.Caulier, M.Goniche,D.Mazon
DRFC, CEA-Cadarache, Association CEA-Euratom, 13108 Saint-Paul-lez-Durance, France
EuratomTORE SUPRA
J.L Ségui
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EuratomTORE SUPRA
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Summary
1) Introduction2) Upgraded 32-channel
heterodyne radiometer3) Routine Data processing 3.1 Post shot 3.2 Real time4) Experimental results5) Conclusion
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1)Introduction On the Tore-Supra tokamak , using analytical formulas, post shot and real time Te profile processing take into account :- the magnetic equilibrium,- the total magnetic field, - the Maxwellian relativistic radial shift, to improve radial location estimate in order to control the plasma. The performed challenge was to realize real time process in less than one milliseçond .It is an important goal for ITER.
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2) Upgraded 32-channel heterodyne radiometer
Figure 1
Vp
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3) ROUTINE DATA PROCESSING 3.1 Post shot
)().()( iViCiTrad pkeV 32 calibration coefficients
Pseudo toric Magnetic field equilibrium
)01.(0
)(&)(piqD
DRR
32 major radius locations
em
iRni
))((eB)( tot
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TORE SUPRA
J.L Ségui
R
RB
vacB 0
0
1
1211)2(
00 J
J
Jp
a
polB
0
02BeTen
diaB
'
'
1)2'(1
12)2'(1
01)2(
20
220
djjB
J
Ja
paraB
p
).().211.83(13.6. phibNcosuuexpvacBcripB 4-10 2.2c , 0;3.518;
20.272.04)1.04(12.04)0.52(12
zphiNb
zRRu
2polB2)diaBparaBripBvac(BtotB
nscalculatio field magnetic Total
)65.1(89.0
1 ),(1 j20 li
jp ea
IJ
00
*0073008.0
R
IB tor
with
with
with
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Figure 2
full line: Bvac , dashed line: Btot
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EuratomTORE SUPRA
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dashed: with relativistic shift
Ohmic+ECRH
Te (kev)
R(m)
R0=2.46m
Shot number: 29029
ohmic
Relativistic Maxwellian shift 7
2
28
275511511
rNpe
cec
ReTeT
RR
Nr=1
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3.2) Real time
Real time processing uses C language and pretabulations in order to do Te profile calculations in a time delay less than one milliseçond.
The real time input values read on the reflective memory network Scramnet are: Ip , Rp , ap , p, D0 , piqD0 , piqJ , piqP=2 , Itor ,Vp the measured ECE plasma
voltages, ne0 , piqne=1.
)().()( iViCiTrad pkeV 32 calibration coefficients
Speudo toric magnetic field equilibrium
)01.(0
)(&)(piqD
DRR
em
iRni
))((eB)( tot 32 major radius locations
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J.L Ségui
Relativistic Maxwellian shiftSame relativistic Maxwellian shift formula has been included into the software
Total magnetic field calculationsSame magnetic fields calculations as post data processing are done but using the following analytical formulas are used to go faster :
piqJ
pB
polB
)21(0
p
pP a
IB
2
00
kpiqJ
piqJk kparaB )21(
12
1 2
10para
B
0
20
0
*)1(2
B
BpiqJB pppara
piqPdiadia BB )1( 2
0 20
00 )1(
1Ppdia B
BpiqPB
with
with
with
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4) Experimental results
process time: 600 s
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5) Conclusions
On the tore-Supra tokamak, using analytical formulas, real time ECE Te profile processing take into account:- the magnetic equilibrium, - the total magnetic field, - and the Maxwellian relativistic radial shift ( very useful for Iter conditions) , to improve radial location estimate in order to control the plasma.The achieved process time is 600 S