HTS Magnets L Rossi Use of Bi-2212 and YBCO: both are promising - - PowerPoint PPT Presentation

Eucard2 HTS Magnets

L Rossi

Use of Bi-2212 and YBCO: both are promising so far

10 100 1,000 10,000 5 10 15 20 25 30 35 40 45 JE (A/mm²) Applied Field (T)

YBCO: Parallel to tape plane, 4.2 K YBCO: Perpendicular to tape plane, 4.2 K 2212: Round wire, 4.2 K Nb3Sn: High Energy Physics, 4.2 K Nb-Ti (LHC) 1.9 K

YBCO B|| Tape Plane YBCO B|_ Tape Plane 2212 RRP Nb3Sn Nb-Ti, 1.9 K

Maximal JE for entire LHC Nb-Ti strand production (–) CERN-

• T. Boutboul '07, and

(- -) <5 T data from Boutboul et al. MT- 19, IEEE-TASC’06) Compiled from ASC'02 and ICMC'03 papers (J. Parrell OI- ST) 427 filament OI-ST strand with Ag alloy outer sheath tested at NHMFL SuperPower "Turbo" Double Layer Tape

The fianl goal is 20 T with 25 T ss design

20 40 60 80 20 40 60 80 100 120 y (mm) x (mm) HTS HTS Nb3Sn low j Nb-Ti Nb-Ti Nb3Sn low j Nb3Sn low j Nb3Sn high j Nb3Sn high j Nb3Sn high j Nb3Sn high j

Material

• N. turns Coil fraction

Peak field Joverall (A/mm

2)

Nb-Ti 41 27% 8 380 Nb3Sn (high Jc) 55 37% 13 380 Nb3Sn (Low Jc) 30 20% 15 190 HTS 24 16% 20.5 380

By Ezio Todesco, Malta workshop on HE-LHC

The scientific aim: first Superconductor

1) Development of 10 kA – 20 T class HTS superconductor with collider characteristics:

• a. JE of 5-600 A/mm2 at 20-25 T in the wire/tape to allow effectively 400 /mm2 in the coil

package (Joverall). Characterization at variable temperatures from 1.9 to 80 K.

• b. Compaction factor: > 85%
• c. Ramp characteristics: effective filament size < 70 m , losses < 0.01 W/m (with ramp of

1 mT/s), suppression of inter-strand current (metallic or ceramic interleave)

• d. Ability to withstand high transverse stress of 120-130 MPa (development of

reinforcement). Moderate creep and hysteresis.

• e. Homogeneity between strands (round or flat): better than 5% over long length and 10%

between different units.

• f. Long term stability of the physics characteristics in reasonable environment.

The scientific aim : develop a real Accelerator Magnets at modest field

1) Design and construction of a 10 kA demonstrator collider magnet, capable of central field B > 5 T in a useful bore of 40 mm.

• a. Margins: in Ic > 20%, and better than 10 mJ as MQE.
• b. Full bore for the beam: evaluation and tests of both cos ends and flat race-track with

flare ends

• c. Geometric field accuracy: better than 0.05%.
• d. Full support of the forces by thin structure
• e. Precise alignment
• f. Protection as single magnet with only external quench heater (condition of the

machine)

• g. Designed to be used also as insert of a 20 T

The scientific aim: the addition that can make the difference

1) Test the demo magnet as insert of an existing magnet (FRESCA2 or another more suitable magnet) to prove the concept of boosting the field of a Nb3Sn dipole from 15 to 20 T (present HE-LHC baseline)

• a. Design of force and stress containment
• b. Design of protection: operation with separated power supply and protection by passive

and active device.

• c. Test at different temperature

Participation of EU industry

• Bruker HTS: OK probably on the fiorm of

« beneficiary », i.e. full particiapants in EU

• language. YBCO
• Nexans :n they discontinued Bi-2212 wire
• production. However they are among the

main provider of Bi-2212 powder to OST! A progream to boost the « leadership » of EU in the domain of the powder is desirable

First guess 8 at constant cost of personnel for each lab

TABLE at 35% reimbursement rate (except CERN) P-months Personnel Cost (at 160 k€/FTE-y) Cost Material (k€) TOT cost EU request % EU request k€ CERN 90 1200 850 2050 30 615 CEA 51 680 250 930 35 325.5 CNRS 18 240 130 370 35 129.5 INFN 27 360 180 540 35 189 KIT 21 280 90 370 35 129.5 STCF 12 160 70 230 35 80.5 UniSouth 12 160 70 230 35 80.5 UniGE 12 160 70 230 35 80.5 UniTwe 12 160 110 270 35 94.5 CIEMAT 12 160 70 230 35 80.5 TOT 267 3560 1890 5450 34.5 1805 CERN will do the 500 k€ order to HTS industry. Cost breakdown by Institute including already overheads in Personnel (60%) and Material(20%):

Th same at 50% reimbursement

TABLE at 50% reimbursement rate (except CERN) P-months Personnel Cost (at 160 k€/FTE-y) Cost Material (k€) TOT cost EU request % EU request k€ CERN 90 1200 850 2050 25 512.5 CEA 30 400 250 650 50 325 CNRS 12 160 130 290 50 145 INFN 15 200 180 380 50 190 KIT 12 160 90 250 50 125 STCF 9 120 70 190 50 95 UniSouth 9 120 70 190 50 95 UniGE 9 120 70 190 50 95 UniTwe 9 120 110 230 50 115 CIEMAT 9 120 70 190 50 95 TOT 204 2720 1890 4610 47.5 1792.5 CERN will do the 400 k€ order to HTS industry. Cost breakdown by Institute including already overheads in Personnel (60%) and Material(20%):

2015 0-4 years 5-7 years 8-10 years 11-15 years > 15 years 8-10 years salary range compressed to a factor J$2 gain vs actual Austria 43,990 59,472 74,954 90,437 105,796 2.0 76,268.09 1.02 Belgium 32,524 48,479 64,557 80,512 96,467 2.0 66,476.34 1.03 Bulgaria 2,625 3,412 4,331 5,118 6,037 4.0 9,760.55 2.25 Croatia 10,626 14,877 19,245 23,495 27,864 1.5 23,805.60 1.24 Cyprus 24,602 37,506 50,531 63,435 76,460 2.0 53,268.31 1.05 Czech Republic 12,587 18,182 23,649 29,244 34,838 3.0 27,953.14 1.18 Denmark 51,066 62,722 74,257 85,792 97,327 1.5 75,611.18 1.02 Estonia 8,966 12,312 15,658 19,004 22,483 4.0 20,427.50 1.30 Finland 32,996 42,477 51,958 61,314 70,795 2.0 54,612.52 1.05 France 34,655 49,033 63,411 77,789 92,167 2.0 65,397.22 1.03 Germany 29,879 46,221 62,563 78,783 95,003 2.0 64,598.71 1.03 Greece 13,751 20,910 28,183 35,343 42,502 2.0 32,223.13 1.14 Hungary 12,603 16,075 19,676 23,148 26,749 3.0 24,211.27 1.23 Ireland 27,006 48,897 70,669 92,560 114,450 2.0 72,232.51 1.02 Iceland 51,535 57,386 63,237 69,087 74,938 2.0 65,233.26 1.03 Israel 17,320 29,599 50,279 70,959 91,639 3.0 53,030.75 1.05 Italy 14,719 26,685 38,532 50,379 62,225 2.0 41,968.45 1.09 Latvia 7,207 10,410 13,613 16,950 20,153 4.0 18,501.82 1.36 Liechtenstein

• Lithuania

14,148 16,304 18,460 20,616 22,906 4.0 23,066.00 1.25 Luxembourg 46,739 63,182 79,754 96,197 112,639 3.5 80,787.88 1.01 Malta 29,513 31,441 33,368 35,295 37,223 2.0 37,105.43 1.11 Norway 65,871 73,047 80,224 87,272 94,449 2.0 81,230.46 1.01 Poland 8,801 12,216 15,762 19,309 22,855 4.0 20,525.77 1.30 Portugal 8,866 19,172 29,478 39,785 50,091 2.0 33,442.41 1.13 Romania 3,322 5,494 7,666 9,837 12,137 3.0 12,901.01 1.68 Slovakia 7,252 9,493 11,735 13,976 16,218 4.0 16,733.23 1.43 Slovenia 19,744 27,815 36,011 44,206 52,402 2.0 39,594.14 1.10 Spain 16,709 27,451 38,073 48,815 59,556 2.0 41,536.25 1.09 Sweden 34,964 53,205 71,447 89,689 107,931 3.0 72,965.58 1.02 Netherlands 31,236 50,392 69,427 88,461 107,617 2.0 71,062.64 1.02 Switzerland 48,021 72,759 97,497 122,236 147,095 2.0 97,497.40 1.00 Turkey 9,304 15,152 21,000 26,716 32,564 4.5 25,458.71 1.21 UK 33,889 48,010 65,814 83,618 101,299 2.0 67,660.19 1.03

• Task1. Coordination and Communication.

Task leader : CERN Participants: CEA, INFN, ??  Coordination and scheduling of the WP tasks  monitoring the work, informing the project management and participants within the JRA  WP budget follow-up

Task 2. 10 KA - 20T class superconductor development. Task leader : CERN? Participants: CNRS, KIT, UniSouthampton, UniGeneva, UT  Development of Bi-2212 strands with suitable basic characteristics (see IV. 1)  Development of 10 kA cable in Bi-2212 with controlled inter-strand resistance Rc, high compaction factor and stress reinforcement.  Development of YBCO tapes with suitable basic characteristics (see IV. 1)  Development of 10 kA cable in YBCO with controlled inter-strand resistance Rc, high compaction factor and stress reinforcement. Characterisation of the strands, tapes and cable at cryogenic temperature

Task 3. 5 T HTS dipole magnet. Task Leader : CEA ? Participants: CERN, INFN,STCF, CIEMAT  Design of the 20 T HTS insert for HE-LHC magnet, with definition of possible range of suitable parameter : J, magnetization, Rc, geometrical tolerance (random and systematic), strain level.  Design the 5 T dipole model – 45 mm free bore (0.5 to 1 m long with the same conductor characteristics of the 20 T insert. Evaluate cos vs. race track topology, protection, etc...  Study of all components (insulations, mechanical, etc.) and tooling  Manufacture the cold mass and derive all mechanical parameters by means of the dummy coils; manufacture of different coils in Bi-2212 and YBCO  Completion of the dipole by assembly of the coil variants in the mechanical structure  Cold power test and magnetic measurements evaluation of the different variant at various temperature.

Task 4. HTS insert and test characterization. Task Leader ? Particpants ?  Design the modification to make the coils working as insert in one High Field facility: EuCARD Fresca2 dipole; high field large bore US dipole; Edipo dipole at EPFL-Villingen. Mechanics, protection, interface, multiple power supply operation, field correction.  Assembly of the modified 5 T HTS dipole inside the selected High field facility  Col power test and evaluation of quench behaviour and dynamic field correction by multiple power supply.