Friday, 2B-07, 9:40-9:50

Challenges in Long-Length Scale Up of High Ic Coated Conductors Processed via HRPLD and ABAD

A. Usoskin

L. Kirchhoff, J. Knoke, B. Prause, A. Rutt, K. Schlenga

Bruker HTS GmbH, Siemensstrasse 88, 63755 Alzenau, Germany
Tel. +49 6023 500 636, Alexander.Usoskin@Bruker-EHTS.com

R. Delmdahl

Coherent GmbH, Hans-Boeckler-Strasse 12, 37079 Goettingen, Germany

Challenges in up-scaling of technological means for processing of HTS coated conductors (CC) via High Rate Pulsed Laser Deposition (HRPLD) and Alternating Beam Assisted Deposition (ABAD) are considered and discussed. Related techniques are already recognized as attractive routes for producing HTS coated conductors while they allow to achieve both high critical currents and efficient tape processing. This was recently confirmed by Fujikura who processed a 500 m long coated conductor with critical current of almost 400A/cm-width (Fujikura, 2008), the highest current ever observed in such long tapes.

We report here (i) an industrial up-scaling of the deposition equipments and techniques towards production speeds of 50-75 m/hour, (ii) a progress in improvement of technological parameters and performance of coated conductors (CC), and (iii) economical aspects of CC tape processing.

Challenges in reaching sufficient processing yields, uniformity of parameters of coated conductors, processing stability are discussed.

Alternatives in upgrading strategy which were partly employed and also partly premeditated for the future are displayed.

Comparison of different processing routes is given regarding substrate types, means for film deposition and material costs.

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