Upload
apria
View
39
Download
0
Embed Size (px)
DESCRIPTION
HT-7U. The Engineering Design of the Poloidal Field System of HT-7U Tokamak. Wu Weiyue, Li Baozeng, Cao Yunluo. PF Group of HT-7U Team Chinese Academy of Sciences, Institute of Plasma Physics (CASIPP) P.O.Box 1126, Hefei, Anhui 230031 P.R.C. 1. Main parameters of HT-7U - PowerPoint PPT Presentation
Citation preview
1
HT-7UHT-7UCASIPPCASIPP
The Engineering Design of the Poloidal Field System of HT-7U Tokamak
PF Group of HT-7U TeamChinese Academy of Sciences, Institute of
Plasma Physics (CASIPP)
P.O.Box 1126, Hefei, Anhui 230031 P.R.C.
HT-7UHT-7U
Wu Weiyue, Li Baozeng, Cao Yunluo
2
HT-7UHT-7UCASIPPCASIPP
1. Main parameters of HT-7U
2. PF coils position & size
3. Conductor design
4. Winding & insulation
5. Analysis on strength of the magnets & structure
6. Fabrication & testing
7. Outlook for the near future
3
HT-7UHT-7UCASIPPCASIPP
1. Main Parameters of HT-7UMajor Radius, Ro 1.79 ~ 1.96 m
Minor Radius, a 0.4 ~ 0.55 m
Plasma Current, IP 1 MA
Elongation, Kx 1.6 ~ 2
Triangularity, x 0.6
Toroidal Field, Bt 3.5 T
Plasma Duration ~ 1000 s
Configuration:Pump limiterDouble nullSingle null
Heating and Driving:LHCD 3.5 MWICRH 3~3.5 MWECRH 0.5 MW
4
HT-7UHT-7UCASIPPCASIPP
7095mm
3430mm
7600mm
2500mm
H13300mm
5
HT-7UHT-7UCASIPPCASIPP
PF1
PF3
PF5
PF7PF9
PF11
PF13
550711
501487
11991339
28903019 3235
3324
1710
1809
2 08 5
1 48 8
1 70 3 9 9
4
4 54
8 20
1 01
Plasma
952
126
126
10
2. PF Coils Position and Size
Center of the device
Equator plane
All PF coils are placed symmetrically about the equator plane
6
HT-7UHT-7UCASIPPCASIPP
6.65m
6.47m
PF Magnets System of HT-7U
7
HT-7UHT-7UCASIPPCASIPP
Parameters of PF coils No. R(cm) Z(cm) Nr Nz Bw(cm) Bh(cm)
1 56.404 4.1085 7 20 2.154 2.213
2 56.404 54.3725 7 20 2.154 2.213
3 56.404 104.6365 7 20 2.154 2.213
4 96.447 172.05 11 4 2.154 2.213
5 96.447 181.921 17 12 2.154 2.213
6 289.623 149.92 6 10 1.974 2.034
7 324.019 83.3 4 8 1.974 2.034
8
HT-7UHT-7UCASIPPCASIPP
3. Conductor for PF coils NbTi strands(UNK) with segregated copper is chosen for all PF coils
The configuration of the PF CICC Ⅰ(for PF1-5)
9
HT-7UHT-7UCASIPPCASIPP
The configuration of the PF CICC Ⅱ (for PF6-7)
10
HT-7UHT-7UCASIPPCASIPP
PF1-PF4 PF5-PF6Strands conf. (2SC+2Cu)34(5+1) (1SC+2Cu)34(5+1)
No. of Sc strand 120 60
No. of Cu strand 141(Φ0.98) 120(Φ0.98)+21(Φ0.87)
Surface Coating with Ni 2m Pb-Sn-Sb3m
Peak field 4.5T >2.5T
CICC size 20.4mm×20.4mm 18.6mm×18.6mm
Conduit material 316LN 316LN
Conduit thickness 1.5mm 1.5mm
Current (Io) 14.5kA 14.5kA
f(Io/Ic) 0.224 0.31
Temperature Margin(ΔTs) 2.24K 1.99K
Stable margin(ΔE) 350mJ/cm3 400mJ/cm3
Parameters about PF CICC
11
HT-7UHT-7UCASIPPCASIPP
4. Winding and insulation
Turns insulation 2 layers kapton 0.06mm, fiberglass 0.44mm;
Pancake insulation 0.84mm fiberglass carpet;
Ground insulation 5mm fiberglass wrapping;
Vacuum pressure impregnates with epoxy resin
12
HT-7UHT-7UCASIPPCASIPP
PF coil’s winding structure
Turns 140 (1 CICC)
Inner Radius 55cm
Outer Radius 71cm
Height 46cm
CICC Length 565m (no joint)
13
HT-7UHT-7UCASIPPCASIPP
7 20=140 turns
2 current terminates
4 cooling tubes
Cooling channel L is 130m (28 turns)
View of one piece central solenoid coil
0.45m
0.16m
1.1m
14
HT-7UHT-7UCASIPPCASIPP
6 coils through bolts preloading;
Height is 4 m;
Total is 6140=840 turns
4m
5. Analysis on magnets strength and structure
15
HT-7UHT-7UCASIPPCASIPP
Helium tubes
Current terminates
Top view of central solenoid
1.87m
Helium tubes in a different angle with the current terminates about 45 degree;
6 coils are set in different angle each other also, according to the terminates and helium tubes.
16
HT-7UHT-7UCASIPPCASIPP
I (KA)
t (s)
PF coils current waveforms for the basic scenariosPlasma current
Ip ignition
OH discharge
OH charge end
17
HT-7UHT-7UCASIPPCASIPP
Moment
Moment
Moment
Fr
Fz
Fr
Fz
Fr
Fz
Electromagnetic Force on solenoid are different on each coil and in each moment.
Analysis on the structure for the preloading force and Electromagnetic Force on support parts of the assembly solenoid.
18
HT-7UHT-7UCASIPPCASIPP
6.1mm & 279 MPa
0.3mm & 16 MPa
47.5 MPa
The results show the design on strength is suitable and safety enough.
19
HT-7UHT-7UCASIPPCASIPP
CSMC after winding
CSMC with supports
A central solenoid model coil (CSMC) had been fabricated in 2000 & tested in 2001.
6. Fabrication and testing for PF system
20
HT-7UHT-7UCASIPPCASIPP
Parameters of CSMC Inductance 15.4mh
Cooling channel 365m
Ioperating 14.5/18KA
Peak field 5T
Stored energy 1.62/2.5MJ
Parameters of solenoid
Turns 914=126
Inner radius 37.6cm
Outer radius 57.3cm
Height 28.6cm
CICC length 368m
Inductance 26mh
Cooling channel 130m
Ioperating 14.5KA
Peak field 4.5T
Stored energy 2.74MJ
Turns 720=140
Inner radius 55cm
Outer radius 71cm
Height 46cm
CICC length 565m
21
HT-7UHT-7UCASIPPCASIPP
CSMC set in testing facility in 2001
22
HT-7UHT-7UCASIPPCASIPP
Test Facility Parameters
Din 3.1 m
Hin 4.7 m
Vacuum1×10-5
torr
Current leads2 pairs
Imax. 30 kA
Refr.
500W/4.5k
Topr. 4.5/3.8K
23
HT-7UHT-7UCASIPPCASIPP
4 days cooling down for CSMC in 1st testing
Part view next
24
HT-7UHT-7UCASIPPCASIPP
Resistance disappeared in 2 days from 6.5m
Part view next
25
HT-7UHT-7UCASIPPCASIPP
Resistance from 1m to 80 in half hour
26
HT-7UHT-7UCASIPPCASIPP
13 KA in CSMC when 1st testing in 2001
27
HT-7UHT-7UCASIPPCASIPP
CSMC just VPI last month in CASIPP
28
HT-7UHT-7UCASIPPCASIPP
A 600m CICC jacketing line has been set up in CASIPP
29
HT-7UHT-7UCASIPPCASIPP
Several types CICC have been fabricatedMore than 8 types CICC with different configuration have been designed and made during past three years.
2 types CICC was made in China(including cabling)
6 types CICC cabling in VNIIKP(Russia) and jacketing in CASIPP
30
HT-7UHT-7UCASIPPCASIPP
Two pieces 600m CICC has been fabricated in CASIPP this year
31
HT-7UHT-7UCASIPPCASIPP
7. Outlook for PF system
• The final design of the PF system will be finished this year.
• One section of central solenoid coils will be fabricated and tested in the end of this year.
• All the components(coils, structure and connecting parts) of PF system will be fabricated completely in next year. The assembly central solenoid will be testing with the structure and preloading.
• The assembly of HT-7U device is planed to start in next year.
32
HT-7UHT-7UCASIPPCASIPP
HT-7U device will be build in Institute of Plasma Physics, Chinese Academy of Sciences(CASIPP)
Sciences Island
33
HT-7UHT-7UCASIPPCASIPP
34
HT-7UHT-7UCASIPPCASIPP
Diameter ф0.87mm
Critical current (Ic) 500A(4.5K,5T)
426A(4.5K,5.8T)
Number of SC filaments 8910
Diameter of SC filament 6μm
twist 10mm
Ratio of s. cu 1.38:1
Parameters of NbTi Strands (UNK)
•Polyamide+Vacuum Pressure Impregnates
•No strands splice
•No lubricant
35
HT-7UHT-7UCASIPPCASIPP
36
HT-7UHT-7UCASIPPCASIPP
• Change the insulation bmp with Zhu Ning new-drawing.