MT27, 27th International Conference on Magnet Technology

Session

WED-OR2-302 HTS coil I

302

17 Nov 2021, 08:30

Fukuoka Convention Center

Conveners

WED-OR2-302 HTS coil I

• So Noguchi (Hokkaido University)
• Seungyong Hahn (Seoul National University)

421. Operation Results of a 23.5-T REBCO Magnet Prototype Towards a Tabletop Liquid-Helium-Free 1-GHz Microcoil NMR (WED-OR2-302-01)

Dongkeun Park (Massachusetts Institute of Technology)

17/11/2021, 08:30

Oral

We present the operation result of a liquid-helium-free 23.5-T/φ12.5-mm-cold-bore magnet prototype composed of a stack of 10 no-insulation (NI) REBCO double-pancake (DP) coils: eight middle coils of 6-mm wide and two end coils of 8-mm wide tape. All the tapes have only 1-µm-thick copper layer on each side to overcome the conductor thickness uniformity issue and enhance the mechanical strength...

417. Metal-as-Insulation HTS Insert for Very-High-Field Magnet: A Test Report after Repairment (WED-OR2-302-02)

Jungbin Song (LNCMI-CNRS)

17/11/2021, 08:45

Oral

As a sequel to our previous report on in-field performance estimation of a 38 mm cold bore metal-as-insulation (MI) HTS insert after quench event of 32.5 T, this paper presents repairment process and test results of the insert. Although the insert had survived against insert quench and fault events of background magnet, the resistances of the insert increased because the inner as well as the...

357. Self-protecting behavior of an intra-Layer No-Insulation (LNI) REBCO coil under an LTS outer coil’s quench (WED-OR2-302-03)

Yu Suetomi (RIKEN)

17/11/2021, 09:00

Oral

Towards a persistent-mode 1.3 GHz (30.5 T) LTS/HTS NMR magnet, quench protection of a layer-wound HTS inner coil is of great importance. The intra-layer no-insulation (LNI) method we recently proposed can be effective in protecting such a layer-wound HTS coil. In fact, we demonstrated an LNI-REBCO coil was protected from a self-quench at a center field of >30 T under a background field....

950. Quench Protection and Cyclic Fatigue Test Results for MTI Coils in the 40T All-superconducting Magnet Project at the NHMFL (WED-OR2-302-04)

Ernesto Bosque (National High Magnetic Field Laboratory)

17/11/2021, 09:15

Oral

The high-strength substrate within REBCO contributes to its selection for use in the NHMFL 40 T all-superconducting magnet. To confidently scale up to a 40 T user magnet, both quench protection and cyclic fatigue are among the technologies that require successful demonstration. Here, numerous test and simulation results from two-in-hand wound, double-pancake stacked, insulated mid-scale test...

846. Hoop stress test of four-stacked two-ply REBCO pancake coils (WED-OR2-302-05)

Dr Kohki Takahashi (Tohoku University)

17/11/2021, 09:30

Oral

We have succeeded in operating a 25 T cryogen-free superconducting magnet (25T-CSM), which consists of LTS outsert coils and Bi2223 insert pancake coils. As a next step, an upgrading of 25T-CSM to 30T-class CSM is considered by replacing the Bi2223 insert coils with REBCO coils, since REBCO tapes have better mechanical and in-field critical current properties. In a design of the 30T-CSM, the...

110. Development of ReBCO Insert Solenoids for Its High Field Application Performance Verification (WED-OR2-302-06)

Huan Jin

17/11/2021, 09:45

Oral

Due to the combined superior electrical and mechanical performance, ReBCO tapes are considered as a candidate material for application of high current carrying magnets operation under high magnetic field. However, the high aspect ratio and multilayer structure of the tape complicate its cable and CICC conductor design and manufacturing. It is therefore important to carry out activities to...

450. Successful demonstration of the first CORC® cable insert solenoid in 14 T background magnetic field operating at currents exceeding 4 kA, current densities of over 250 A/mm2, and 275 MPa source (JBR) stress (WED-OR2-302-07)

Jeremy Weiss (Advanced Conductor Technologies and University of Colorado, Boulder)

17/11/2021, 10:00

Oral

Advanced Conductor Technologies has been developing high-temperature superconducting (HTS) Conductor on Round Core (CORC®) cables and wires wound from ReBa2Cu3O7- coated conductors for use in high-field magnets that would ultimately operate at fields exceeding 20 T. CORC® cables and wires have matured into practical high-current and high-current density magnet conductors that are being...

864. Bi-2212 Coil Technology (WED-OR2-302-08)

Ulf Trociewitz (Applied Superconductivity Center/National High Magnetic Field L)

17/11/2021, 10:15

Oral

From a magnet designer’s point of view Bi-2212 round conductor is, in many aspects, the ideal candidate for high field magnets. Besides very high critical current densities that exceed specification for conductor of the Future Circular Collider (FCC) of 1500 A/mm2 in 16 T background, it offers two particular advantages over other HTS conductors, namely that it is available as an up to one mile...