Development of Radiation-Tolerant HTS Magnet for Muon Production Solenoid
Abstract
:1. Introduction
2. LTS Production Solenoid
2.1. COMET Production Solenoid Design
2.2. Thermal Design and Influence of Irradiation
2.3. Degradation of Thermal Conductivity by Neutron Irradiation on Pure Aluminum and Copper
3. HTS Magnet Studies under High-Radiation Environment Conditions
3.1. Studies of Conduction-Cooled Production Solenoid with HTS
3.2. Studies of FRIB Fragment Separator Magnets
3.3. Proton Irradiation Studies on YBCO Tapes
3.4. Neutron Irradiation Studies on ReBCO Tapes
3.5. Radiation Hard Insulations
4. Muon Production Solenoid for Future High Intensity Muon Beam Line
5. Discussion
6. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Coil Identification | Inner Diameter [mm] | Thickness [mm] | Length [mm] | No. of Turns | No. of Layer | Operation Current [A] |
---|---|---|---|---|---|---|
CS0 | 1344 | 152 | 180 | 35 | 9 | 2700 |
CS1 | 1344 | 152 | 1391 | 270 | 9 | 2700 |
MS1 | 1344 | 84 | 1468 | 285 | 5 | 2700 |
MS2 | 1344 | 118 | 721 | 140 | 7 | 2700 |
TS1a | 500 | 16 | 200 | 40 | 1 | 2700 |
TS1b | 500 | 48 | 240 | 48 | 3 | 2581 |
TS1c | 500 | 64 | 200 | 40 | 4 | 2700 |
TS1d | 500 | 64 | 320 | 64 | 4 | 2619 |
TS1e | 500 | 48 | 200 | 40 | 3 | 2538 |
TS1f | 820 | 96 | 350 | 70 | 6 | 2916 |
Period | Temperature | Neutron Fluence | Measured Resistance 1 |
---|---|---|---|
Before cool-down | 300 K | 0 | 1.3 mΩ |
After cool-down | 10 K | 0 | 3.0 µΩ |
During irradiation | 12–15 K | 1.4 × 1015 n/m2/s (45 h) | 3.1–5.7 µΩ Monotonic increase |
After irradiation | 12 K | 2.3 × 1020 n/m2 | 5.6 µΩ |
After warm-up to RT | 302 K | 2.3 × 1020 n/m2 | 1.3 mΩ |
After the second cool-down | 12 K | 2.3 × 1020 n/m2 | 3.0 µΩ |
Parameter | Value |
---|---|
Pole Radius | 110 mm |
Design Gradient | 15 T/m |
Magnetic Length | 600 mm |
Field Parallel to HTS Tape | ~1.9 T |
Field Perpendicular to HTS Tape | ~1.6 T |
Stored Energy | ~40 kJ |
Operating Temperature | ~38 K (nominal) |
Design Heat Load on HTS Coils | 5 kW/m3 |
Parameter | Value |
---|---|
Coil size | ID = 1600 mm, t = 21 mm, L = 600 mm |
Number of turns per layer | 70 |
Number of double pancake coils | 60 |
Transport current | 200 [A] |
Peak field @solenoid axis | 1.12 [T] |
Peak field @coil | 2.41 [T] (B//ab: 2.09 [T], B//c: 2.25 [T]) |
Load line ratio | 48 [%] |
Peak radial magnetic force of coil | 78 [kN] |
Axial magnetic force of cold mass | 694 [kN] |
Peak stress @coil | 38 [MPa] |
Conductor length per double pancake coil | 733 [m] |
Total cable length | 44 [km] |
Conductor cost ($80/m) | 3.52 [M$] |
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Ogitsu, T.; Iio, M.; Kawamura, N.; Yoshida, M. Development of Radiation-Tolerant HTS Magnet for Muon Production Solenoid. Instruments 2020, 4, 30. https://0-doi-org.brum.beds.ac.uk/10.3390/instruments4040030
Ogitsu T, Iio M, Kawamura N, Yoshida M. Development of Radiation-Tolerant HTS Magnet for Muon Production Solenoid. Instruments. 2020; 4(4):30. https://0-doi-org.brum.beds.ac.uk/10.3390/instruments4040030
Chicago/Turabian StyleOgitsu, Toru, Masami Iio, Naritoshi Kawamura, and Makoto Yoshida. 2020. "Development of Radiation-Tolerant HTS Magnet for Muon Production Solenoid" Instruments 4, no. 4: 30. https://0-doi-org.brum.beds.ac.uk/10.3390/instruments4040030