WP14 Progress Meeting Task 14.5 HTS innovative process ......Magnetic field [T] 4.2 K 20 K 30 K 40 K...

ARIES is co-funded by the European Commission Grant Agreement number 730871

WP14 Progress Meeting

Task 14.5 HTS innovative process for

magnet conductor (REBCO coated conductor development for HTS

accelerator magnets)

Lucio Rossi – CERN

For all task14.5 members

HTS in accelerators: not only highest field

1970 1980 1990 2000 2010 2020 2030 20400

2

4

6

8

10

12

14

16

18

20

FCC-hh

HTS Dipole

HL-LHC

LHCSSC

HERA

Tevatron

Mag

ne

tic

fie

ld [

T]

Year

SPS

• 20+ T dipole field is the holy grail for accelerator people

• High rad zone, B=15-16 T with high margin

• Or operation of full accelerator at 10-15 T in 10-20 K gas

• Pulsed magnets in the accelerator chain: 3-6 T at 20-80 K for low power consumption

• Long SC links (s.f. 100-200 kA cable, 100-500 m long)

L. Rossi - ARIES-WP14 progress Meeting @ CERN - 25 Nov 2019

25 T

2

High Temperature Superconducting (HTS) innovative

process for accelerator magnet conductor

WP14.5

Lucio ROSSI – Task Leader

Thibault LECREVISSE – Deputy Task Leader

Carmine SENATORE

Alexander USOSKIN – Ulrich BETZ – Industrial Partner

Marc DHALLÉ

EC-H2020 - ARIES Accelerator Technology and Integration – 2017-2021

WP14 Promoting Innovation


• Set up a NEW process optimization in to:

Increase Je by a factor 2 wrt

from Je (4.2 K, 20 T) = 400-600 A/mm2

to Je (4.2 K, 20 T) = 800-1000 A/mm2

• Produce in some 450 m of tapes

• Use in a winding at (very much like )

• Electrical, magnetic, mechanical and thermal properties tested

at and

Scope of the work of ARIES - WP14.5


W14 overall budget breakdown

5L. Rossi-CERN- June 8, 2017 – Task 14.5

Beneficiary

short

name*

Person -

months

Monthly

personnel

costs

Personnel

direct costs

Travel

direct

costs

Equipment

and

consumable

s

Other

direct

costs

Sub-

contracting

costs

Material

direct costs

Total direct

costs

Total

indirect

costs**

Total costs

(direct +

indirect)

EC

requested

funding

CERN 40.00 8,000.00 320,000.00 30,000.00 0.00 30,000.00 350,000.00 87,500.00 437,500.00 0.00

CEA 20.00 6,000.00 120,000.00 15,000.00 15,000.00 135,000.00 33,750.00 168,750.00 0.00

BHTS 50.00 5,800.00 290,000.00 5,000.00 240,000.00 245,000.00 535,000.00 133,750.00 668,750.00 334,375.00

UT 20.00 6,500.00 130,000.00 8,000.00 45,000.00 53,000.00 183,000.00 45,750.00 228,750.00 114,375.00

UNIGE 12.00 10,000.00 120,000.00 3,000.00 45,000.00 48,000.00 168,000.00 42,000.00 210,000.00 105,000.00

Total 142.00 36,300.00 980,000.00 61,000.00 330,000.00 0.00 0.00 391,000.00 1,371,000.00 342,750.00 1,713,750.00 553,750.00

* Alphabetical order

Monthly personnel costs = average direct monthly salary (€) - to prevent rounding problems on the cost data, give the monthly salary as a multiple of 100€

Other direct costs may include meeting organization

Sub-contracting costs do not give rise to reimbursement of overheads

CERN and CEA do not ask for money to EU. All budget to Industry and Universities.

2.5 10 1005

10

100

STI

UoH - laboratory tape

SuperPower M3

J c-la

yer

(19

T,4

.2K

) [k

A/m

m2]

Jc-layer

(s.f.,77K) [kA/mm2]

BHTS T150

BHTS T2289

BHTS T2291

BHTS T003

SuperOx

AMSC

Fujikura

SuNAM

SuperPower M4

BHTS T002

BHTS T2290

c layer

Critical CurrentJ

YBCO Area

Jc(s.f.,77K) vs. Jc(19T,4.2K) (ca. 2016) when ARIES was defined


Review by C. Senatore, UniGE

6

e

Critical CurrentJ

Total Area

YBCO 3.8 m / SS 100 m

YBCO 2.0 m / SS 100 m

1 10 30

100

1000

10000

BHTS T002

BHTS [email protected], B//c

J e [

A/m

m2]

Magnetic field [T]

Performance target for

Prototype tapeat the beginning of EuCARD-2

Double disordered YBCOUsoskin et al., SuST 28 (2015) 114007

c layer

Critical CurrentJ

YBCO Area

1 10 30

10

100

500

@4.2K, B//c

J c-la

yer [

kA/m

m2]

Magnetic field [T]

BHTS T002

BHTS T2290


YBCO layer

How to get there?

• Increase the layer Jc of YBCO

• Increase the thickness of YBCO

• Reduce the thickness of the substrate 100 m SS 50 m SS

e

Critical CurrentJ

Total Area

YBCO 3.8 m / SS 100 m

YBCO 2.0 m / SS 100 m

1 10 30

100

1000

10000

BHTS T002

BHTS [email protected], B//c

J e [

A/m

m2]

Magnetic field [T]

Main target for increasing Je


ARIES project @ Bruker HTS

PLD300: application equipment

Pulsed Laser Deposition PLD600: production equipment

The PLD300 system, used for ARIES, is co-owned by BHTS and CERN


PROCESSING 50 µm x 12 mm x 29 m HTS tape

• Ic measurement from tape sample (start position) Ic(77 K, s.f.) = 174 A

• Average Ic value from Hall-Probe-Measurement (TapeStar) of the 29 m long HTS tape Ic(77 K, s.f.) = 161 A

• 2 x Ic drops detected in the range 23-25 m

• However severe problems of mechanical stability


Courtesy of A. Usoskin, BHTSL. Rossi - ARIES-WP14 progress Meeting @ CERN - 25 Nov 2019

10


General appearance of HTS tapes with 50 µm SS substrates

The new tapes reveal a strong tape curvature

(tape bow) due to intrinsic film stresses of the

coatings

YBCO tape

Curvature does not exceed the critical one: no deterioration of Ic can be obtained after flattening (but not easy)

Optimization of the coating process was not easy …

U. Betz and A. Usoskin BHTS


But bending is an issue for practical use…


At high temperature stainless substrate is soft. And YSZ is thick… Using YSZ with ABAD to try to correct the curvature

Also more sophisticated attempts…

12

Tape ID WidthDD-YBCO thickness

Stabilizer Orientation Temperatures

Q023 12 mm 1.95m 2x 20m Cu 90°4.2K – 20K – 30K –

40K

Q056 4 mm 1.78m 2x 20m Cu

90° 4.2K – 20K – 30K

10° 4.2K – 20K – 30K

0°4.2K – 10K – 20K–

30K – 40K

Q064 12 mm 1.9-2.0m 2x 20m Cu

90°4.2K – 10K – 20K–

30K – 40K

0° 40K

Q065 12 mm 1.9-2.0m 2x 7m Cu 90° 4.2K

Measurement campaign on the ARIES tapes


Critical current tests up to 2 kA on 12mm tapesMagnetic fields up to 19 T (21 T) and temperatures up to 40 K

• Possible to test long samples (> 120 mm) at various angles: = 0°, 5°, 7.5°, 10° and 90°

• Active stabilization of the sample temperature

C. Barth, M. Bonura, and CS, IEEE TASC 28 (2018) 9500206L. Rossi - ARIES-WP14 progress Meeting @ CERN - 25 Nov 201914

Ic tests in gas flow Active temperature stabilization

200 400 600 800 1000 1200 1400 1600 1800 2000

0

10

20

30

40

50

60

B = 8 T

voltage taps distance = 31 mm

40 K 30 K 20 K 4.2 K

Vo

ltag

e [

V]

Current [A]

800 1000 1200 140019.8

19.9

20.0

20.1

20.2

Sam

ple

te

mp

era

ture

[K

]

Current [A]

400 600 800 100029.8

29.9

30.0

30.1

30.2

Current [A]

300 400 500 60039.8

39.9

40.0

40.1

40.2

Current [A]

Q023 – 12 mm in perpendicular field


5 10 15 20 25 30

600

800

1000

1200

1400

1600

1800

2000

776 A/cm @ 19 T

842 A/cm @ 19 T

Ic @ 1 V/cm

= 90°, T = 4.2 K I c/w

idth

[A

/cm

]

Magnetic field [T]

Q056-18 - 4 mm - 2x 20 m Cu

Q023-18 - 12 mm - 2x 20 m Cu

Q064-18 - 12 mm - 2x 20 m Cu

Q065-18 - 12 mm - 2x 7 m Cu

600 700 800 900

0

10

20

30

40

50

4 mm

12 mm T = 4.2 K

B = 19 T

= 90°

Q056-18 - 4 mm

Q023-18 - 12 mm

Q064-18 - 12 mm

Q065-18 - 12 mm

V [

V]

I/width [A/cm]

Reproducibility of performance: Ic(B, =90°,T =4.2 K)

The 4mm tape has a slightly lower decrease of Ic with B

The maximum measured spread in Ic is ~10% (at 19 T)L. Rossi - ARIES-WP14 progress Meeting @ CERN - 25 Nov 2019

16

Performance overview (2016): Jc(s.f.,77K) vs. Jc(19T,4.2K)

Updated with the results on the tapes

2.5 10 1005

10

100

Fujikura 2019

BHTS Q056BHTS Q064

STI

15 mol % Zr

SP M3

J c-la

yer

(19

T,4

.2K

) [k

A/m

m2]

Jc-layer

(s.f.,77K) [kA/mm2]

BHTS T150

BHTS T2289

BHTS T2291

BHTS T003

SuperOx

AMSC

Fujikura

SuNAM

SP M4

BHTS T002

BHTS T2290


Engineering current density Je(B,T) – angular dep.

5 10 15 20 25 30100

1000

5000

= 0.76

Q064-18, 2x 20m Cu

Ic @ 1 V/cm

= 90°

10 K

J e [

A/m

m2]

Magnetic field [T]

4.2 K

20 K

30 K

40 K

820 A/mm2

Q064 – 12 mm in perpendicular field

5 10 15 20 25 30100

1000

5000

J e [

A/m

m2]

Magnetic field [T]

Ic @ 1 V/cm

= 0°

Q056-18, 2x 20m Cu

40 K

30 K

20 K

10 K4.2 K

Q056 – 4 mm in parallel field

0 10 20 30 40 50 60 70 80 900

1000

2000

3000

4000

J e [

A/m

m2]

[°]

4.2 K

20 K

30 K

Ic @ 1 V/cm

B = 19T

Q056-18, 2x 20m Cu

The peak at = 0° becomes steeper when increasing the temperature at fixed field


Temperature dependence of Je

0 10 20 30 40 50 60 70100

1000

10000

Temperature [K]

Q056 - B = 1 T

Q056 - B = 2 T

Q056 - B = 3 T

Q056 - B = 4 T

Q056 - B = 5 T

Q056 - B = 6 T

Q064 - B = 10 T

Q064 - B = 15 T

Q064 - B = 19 T

J e [

A/m

m2]

T* ranges between 18 K and 29 K, with a maximum at 4 T

0e e

TJ B,T J B,T exp

T *

1 1 2

2

e

e

J B,T T T exp

J B,T T *

Temperature scaling

Full characterizationvery important for magnet design


5 10 15 20 25 30100

1000

5000

= 0.76

Q064-18, 2x 20m Cu

Ic @ 1 V/cm

= 90°

J e [

A/m

m2]

Magnetic field [T]

820 A/mm2

5 10 15 20 25 30100

1000

5000

= 0.75

= 0.76

Q064-18, 2x 20m Cu

Ic @ 1 V/cm

= 90°

J e [

A/m

m2]

Magnetic field [T]

820 A/mm2

Q065-18, 2x 7m Cu

1150 A/mm2

Tape Q065-18 (with 2x 7m Cu) reached a very high performance of 1150 A/mm2 at 4.2 K, 19 T, 90°

Engineering current density Je(B,T=4 K)Performance target


High current density confirmed in NHMFL-FL (2018)


• Q040: Ic in-field measurement of 4 mm wide HTS production tape from 2017 showing 250 A at 4.2 K, 30 T, B//c

• Q021: IC in-field measurement of 12 mm wide ARIES HTS tape with 50 µm substrate thickness from 2017 revealing 290 A at 4.2 K, 30 T, B//c

• Highest in-field engineering current density: Je >1100 A/mm2 at 20 T, 4.2 K, B//c,50 µm thick substrate

Measuremënts by :D. Abraimov, G. Bradford, J. Jaroszynski, and D.C. Larbalestier, June 2018. Thanks to NHMFL_ASC (Fl)

414 A 1130 A/mm2

21

Image with hall probe scanning

• The scan (at 77 K, s.f.) shows a

very homogeneous coating with no

cracks. Resolution was 200 µm.

• Scan with a higher resolution (50

µm) of an area with a slight

disturbance. It does not seem to

result from cracks either.


Measurements by courtesy of Dr. S. Holleis and Prof. M. Eisterer,Low Temperature Physics and Superconductivity Vienna

More measurements planned by CERN (A. Ballarino, C. Barth) at Grenoble in future

22

Result from production: repeatibility not fully successful…

Curved tape800 A/mm2 at 20 T, 4.2K


We need to review the process since the yield isnot satisfactory (about 50%):

The tape is nowunder finshing to beused for technologytest coils

Conclusions: the process need to be modified for producing straight tape. Either change system for 12 mm St.St. tape handling (especially polishing) or use Hastelloy for substrate

23

Deliverable report D14.4


Out of the total length of

413 m, 160 m (#17703-

05-06) present a current

density above, or much

above, the target of this

Deliverable that was set at

800 A/mm2 at 18 T, 4.2 K.

W14 – timeline of deliverables and milestones; Task 14.5 in evidence

25L. Rossi-CERN- June 8, 2017 – Task 14.5

MS42 appointing IAB - M12MS43 1st academia meets industry – M24MS44 2nd academia meets industry – M36MS45 1st HTS short length – M14MS46 characterization of 1st short long lenght – M36MS47 review requirements doc – M12MS42 review design and conf doc– M21

MS14 done

D14.4 done

Outlook to next activity

• The goal of the D14.4 deliverable has been fully achieved and actually

exceeded, with all production of ten long lengths foreseen in the ARIES

program fulfilled.

• Now we will proceed to fully characterization as required by the MS46

“Characterization of first long length conductor”, due by M36 (30 April

2020).

• As a further step we will test this tape to verify its use in magnet technology:

suitability for winding, adaptability to solder (especially low Cu coating

thickness), etc…


WAMHTS-5 in Budapest


WAMHTS-5 in Budapest 11-13 April 2019 on HTS Magnet applications – 66 participants

We are influencing the future:ECFA pecial session on HTS Magnets:https://indico.cern.ch/event/847002/overview

ARIES is co-funded by the European Commission Grant Agreement number 730871

Thank you for your attention

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WP14 Progress Meeting Task 14.5 HTS innovative process ......Magnetic field [T] 4.2 K 20 K 30 K 40 K...

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