Benchmark of Two Quench Codes for the Protection Study of an High Field HTS Insert Dipole

In the EC FP7 program EuCARD (European Coordination for Accelerator Research & Development) the subject of work-package 7 is High Field Magnets. The aim of the HFM work-package is to develop technologies for magnets in the range 13 T -20 T for accelerator applications like HL-LHC and HE-LHC. The work-package foresees construction of a 13 T dipole with an aperture of 100 mm, an HTS dipole insert with B = 6 T, an HTS current link and a helical undulator. The work-package has 12 European partners and the funding is shared between the EC and the partners.This contribution describes the aims of the work-package, the status of the work and the structure of the collaboration. CERN-ATS-2012-025February 2012 Abstract

Section: Very High Field Dipole Insertmentioning

confidence: 99%

The EuCARD High Field Magnet Project

Rijk

2012

“…It permits to reach the very high field required thanks to their outstanding in field current capacities. In order to produce these kinds of magnets, the orientation of the field with respect to the HTS tape should be studied with caution [3], innovative protection scheme is needed [4], [5] and some technological developments are needed to withstand the high stress level. The objective of the study is to build a HTS magnet producing 6 T in an aperture of 99 mm inserted in a Nb 3 Sn dipole of 13 T [6].…”

Section: Introductionmentioning

confidence: 99%

HTS Dipole Insert Developments

Rey

Devaux

Bertinelli

et al. 2013

Future accelerator magnets will need to reach a magnetic field in the 20 T range. Reaching such a magnetic field is a challenge only reachable using high temperature superconductor (HTS) material. The high current densities and stress levels needed to satisfy the design criterion of such magnets make YBaCuO superconductor the most appropriate candidate especially when produced using the IBAD route. The HFM EUCARD program is aimed at designing and manufacturing a dipole insert made of HTS material generating 6 T inside a Nb 3 Sn dipole of 13 T at 4.2 K. In the HTS insert, engineering current densities higher than 250 MA/m 2 under 19 T are required to reach the performances. The stress level is consequently very high. The insert protection is also a critical issue as HTS shows low quench propagation velocity. The coupling with the Nb 3 Sn dipole makes the problem even more difficult. The magnetic and mechanical designs of the HTS insert will be presented as well as the technological developments underway to realize this compact dipole insert.

“…It permits to reach the very high field required thanks to their outstanding in field current capacities. In order to produce these kinds of magnets, the orientation of the field with respect to the HTS tape should be studied with caution [1][2][3], the stress level should be well controlled and new way of protection should be developed [4]. The objective of the study is to demonstrate the feasibility of a HTS magnet of 6 T in an aperture of 99 mm inserted in a Nb 3 Sn dipole of 13 T. The design of this insert is mainly driven by the mechanical structure: an external tube of 3 mm with pads is used to maintain forces, as detailed on the seventh section.…”

Section: Introductionmentioning

confidence: 99%

HTS Insert Magnet Design Study

Devaux

Debray²,

Fleiter³

et al. 2012

Abstract-Future accelerator magnets will need to reach higher field in the range of 20 T. This field level is very difficult to reach using only Low Temperature Superconductor materials whereas High Temperature Superconductors (HTS) provide interesting opportunities. High current densities and stress levels are needed to design such magnets. YBCO superconductor indeed carries large current densities under high magnetic field and provides good mechanical properties especially when produced using the IBAD approach. The HFM EUCARD program studies the design and the realization of an HTS insert of 6 T inside a Nb 3 Sn dipole of 13T at 4.2 K. In the HTS insert, engineering current densities higher than 250 MA/m 2 under 19 T are required to fulfill the specifications. The stress level is also very severe. YBCO IBAD tapes theoretically meet these challenges from presented measurements. The insert protection is also a critical because HTS materials show low quench propagation velocities and the coupling with the Nb 3 Sn magnet makes the problem even more challenging. The magnetic and mechanical designs of the HTS insert as well as some protection investigation ways will be presented.Index Terms-High field magnet, High Temperature Superconductor, YBaCuO.