27 August 2017 to 1 September 2017
RAI Congress Center, Amsterdam, The Netherlands
Europe/Amsterdam timezone

Magnetization of CORC, TWST, and Roebel Cables for HEP applications and Associated Error fields

29 Aug 2017, 15:00
15m
G102-103 Room

G102-103 Room

Regular 15 minutes Oral Presentation G5 - Magnetization and Field Quality Tue-Af-Or18

Speaker

Mike Sumption (The Ohio State University)

Description

Magnetization and AC loss measurements were performed on cables made from HTS coated conductors. Coated conductor-based CORC, Twist stack, and Roebel Style cables were measured and were compared. In a first set of runs, magnetization was measured out to 1.4 T at 4 K, and was compared for the various cable options with reference to the field at injection for particle accelerators. Additionally, progress and initial measurements made with a new 3 T/4 K small dipole measurement system are presented. The M-H measurements were compared to values for the coated conductor tapes themselves, and to simple analytical models. CORC cables made with tapes with different levels of striation are presented.. The penetration field and the saturation magnetization, as well as the magnetization at injection are compared for the various cable types. CORC cables are seen to shield and trap flux from the whole of the cable (including the central core) at lower fields, while flux penetration is enhanced in CORC cables with striated strands. The measured magnetization values were then used to compute error field harmonics for a 4-layer, canted-cosine dipole magnet using two different approaches: (1) a Biot Savart and doublet approach, and (2) FEM modelling using COMSOL.

Submitters Country USA

Primary authors

Mike Sumption (The Ohio State University) Milan Majoros (The Ohio State University) Chris Kovacs (The Ohio State University) Arend Nijhuis (University of Twente) Kostyantyn Yagotyntsev (University of Twente) Xiaorong Wang (Lawrence Berkeley National Laboratory) Prof. Ted Collings (MSE, The Ohio State University)

Presentation Materials