Bruker Energy Supercon Technologies BEST EUCARD 2 status

Bruker Energy & Supercon Technologies (BEST) EUCARD 2 status by Bruker HTS (together with KIT) CERN-BHTS T-conference 31. 08. 2015 Innovation with Integrity

Outline • • Critical currents in high fields: new UH Ic-s; BHTS comments Plating of 32 -36 m tape with KIT meander Dog-boning General status at Bruker HTS Gustaaf Van Tendeloo Alexander Meledin, Uni Antwerpen CERN-BHTS Meeting , Alzenau, June 18, 2015 Bruker HTS 2 2

New HU data (summer 2015): BHTS comments: Great results!! - To check tape length in UH (it should be above 0. 1 m) - Alpha value seems to be above 1 (we have 0. 88); this may reduce currents above 20 T CERN-BHTS T-Conf. , Aug 31, 2015 Bruker HTS 3

EUCARD 2: SS+Ag tapes recently punched by KIT Confidential CERN-BHTS Meeting , Alzenau, June 18, 2015 Bruker HTS Confidential

Additional protection of tape after punching at KIT Suppression of dog boning is implemented. This suppression is found to be dependent on quality of punching. Two new defects were introduced to the 36 m long tape: one from low-current end (delta x = 1. 5 m from the end). Other defect was at distance 21 (? ) m. Reason: errors in tape handling (not during plating step!) Confidential CERN-BHTS Meeting , Alzenau, June 18, 2015 Bruker HTS Confidential

Progress in suppression of dog-boning: is important in case of meander-punched tapes 35 µm Cu thickness: 27µm in the middle 38µm at the edge Not ideal, but much better! CERN-BHTS Meeting , Alzenau, June 18, 2015 Bruker HTS Confidential 6

EUCARD 2: Highlights at Bruker HTS CERN-BHTS Meeting , Alzenau, June 18, 2015 Bruker HTS

First 610 m long tapes (w=4 mm) processed in PLD 600 (May-June 2015) Confidential Innovation with Integrity 8 8

Summary • BHTS is transferred by 90% to new building. Installation works with equipment are in progress. Installation to be completed in October 2015. Fine tuning of process parameters: November 2015 • New equipment for 12 mm tape is ordered in the end of August. New PLD 300 will be assembled in November 2015; will be put in operation in the beginning of 2016. • Works on alternative processing sequence is successfully accomplished by KIT and BHTS. Additional protection of tape after punching is developed. 36 (? )m long tape is processed with minor problems (not by plating!) • Suppression of dog boning is implemented. This suppression is found to be dependent on quality of punching. CERN-BHTS Meeting , Alzenau, June 18, 2015 Bruker HTS Confidential 9

Innovation with Integrity Copyright © 2014 Bruker Corporation. All rights reserved. www. bruker. com

Supporting foils: CERN-BHTS Meeting , Alzenau, June 18, 2015 Bruker HTS

Progress in length up-scale 2014: record Ic in 22 m highest Ic 500 production: 2 km in 2 months highest Ic: short samples 400 production level Ic 100 0 0 Dec 2014, 2 pcs 200 Jul-Aug 2014, 15 pcs 300 Feb 2014, 3 pcs Critical current in 4 mm wide tape at 4. 2 K, 18 T, Bǁc [A] 600 100 200 goal of 2015: 600 m + 300 400 Length of 4 mm wide tape, m PLD 2 (250 m) CERN-BHTS Meeting , Alzenau, June 18, 2015 500 600 in main cases, Ic-s are re-calculated from Ic-s at 5 T Confidential 2010: record Ic in 6 m 700 PLD 600 Bruker HTS 12