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Parameters Values [mm] 1 st layer HTS coil 2 nd layer HTS coil HTS wire SuNam SuperPower (SCS12050) Aperture radius 150 Pole tip radius 160 Yoke length 480 Field gradient 9 T/m Effective length 574 HTS tape Ic @77K, sf. 400 A 400 A HTS Q-magnet Ic @40K 480 A 600 A Operating current 340 A HTS tape width / thickness 12.0 / 0.1 SUS tape width / thickness 12.0 / 0.12 Inner radius 30.0 Outer radius 66.08 Race track total straight length 1,464 1,520 Number of Turn 164 turn 164 turn Tape length of one turn 1,652 1,708 total length of HTS Tape 289.5 m 298.7 m Total tape length of HTS coils per one pole 588.2 m 1 st layer HTS coil 2 nd layer HTS coil Design of Prototype HTS Coil for Quadrupole Magnet HTS coil (single pole) Scheme of prototype HTS coil Ic estimation ■ Two HTS wires for prototype HTS Q-magnet - SuNam wire + SuperPower wire 1 st layer coil (SuNam) 2 nd layer coil (SuperPower) Superconducting Magnet and Cryogenic Systems for In-Flight Separator of RISP in Korea H. C. Jo, D. G. Kim, C. C. Yun, C. J. Choi, J. W. Kim Institute for Basic Science, Daejeon, Korea Rare isotope science project (RISP) is underway in Korea to construct a heavy ion accelerator complex to provide both stable and radioisotope (RI) beams with various users. An in-flight fragment (IF) separator to produce and separate RI beams consists of a production target, beam dump, and a series of superferric superconducting magnets with large apertures. The sc-magnets utilize either low-Tc or high-Tc superconductors depending on the level of radiation heating from the production target. The low-Tc superconducting magnet with cold iron operates at 4 K, while the high-Tc one with warm iron operates at around 40 K using cold helium gas. The cryogenic system for the IF separator has been designed considering heat loads on the sc-magnets, and some details of its distribution system is also being considered. We will present the status of prototyping superconducting magnets and the conceptual design of cryogenic system. Abstract In-flight Fragment (IF) Separator at Rare Isotope Science Project (RISP) Rare Isotope Science Project - Prototype HTS quadrupole magnet will be manufactured and tested by end of next yea 10-P3-242 This work was supported by the Rare Isotope Science Project funded by the Ministry of Science, ICT and Future Planning (MSIP) and the National Research Foundation (NRF) of Korea. Layout of IF separator Pre-separator : Remove primary beam and unwanted isotopes Main separator : Identify the isotopes of interest High radiation region in pre-separator : Superferric magnet with warm iron based on the high temperature superconductor (HTS). Pre- separator Magnet Components Coil type Bending angle Pole full gap (m) Pole width (m) Dipole PSD1 HTS (or MIC) 30° 0.15 0.6 PSD2,3,4 LTS 30° 0.15 0.6 Quadrupole Triplet Components Coil type Effective Length (m) Half Aperture (m) Field Gradient (T/m) PSQT1 HTS 0.55-0.9-0.55 0.12-0.15-0.15 16.4, -13.5, 12.7 PSQT2 HTS 0.55-0.9-0.55 0.15-0.15-0.17 8.5, -9.1, 9.0 PSQT3 LTS 0.55-0.9-0.55 015-0.15-0.15 3.8, -8.7, 10.8 PSQT4 4.1, -9.2, 10.2 PSQT5 7.9, -10.7, 9.2 PSQT6 9.2, -10.7, 8.0 PSQT7 10.0, -9.3, 5.7 Main Separator Magnet type Components Coil type Bending angle Pole gap (m) Pole width (m) Dipole MSD1,2,3,4 LTS 30° 0.15 0.6 Quadrupole Triplet Components Coil type Effective Length (m) Half Aperture (m) Field Gradient (T/m) MSQT1 LTS 0.55-0.9-0.55 015-0.15-0.15 7.1, -9.7, 10.0 MSQT2 8.0, -10.9, 9.6 MSQT3 9.5, -10.9, 8.1 MSQT4 10.0, -9.8, 7.2 MSQT5 7.2, -9.8, 10.0 MSQT6 8.0, -10.8, 9.5 MSQT7 9.6, -10.8, 7.8 MSQT8 10.2, -9.7, 6.3 Specification of magnet used in IF separator Beam tube Cooling channel Yoke Beam Delivery System (Linac to IF target) IF separator High Radiation Region (Hot cell) Pre-separator Main separator • BDS - Sky blue: LTS dipole magnet - Blue & Green: Normal conducting quadrupole magnet - Red & Yellow: Normal conducting sextupole magnet • High Radiation Region - Sky blue: HTS or MIC dipole magnet - Green: HTS quadrupole magnet - Red: HTS or MIC sextupole magnet • IF separator - Sky blue: LTS dipole magnet - Green: LTS quadrupole magnet - Red: Normal conducting sextupole - Red: LTS Sextupole + Octupole coil HTS wire SUS tape HTS wire + SUS tape Winding Layer to layer joint Voltage tap Terminal install LN2 test Cross section of prototype HTS Q-magnet Cryostat ■ Fabrication of HTS coil(single) ■ Test @ 77 K (LN2) Parameters LQ1 (2) Field gradient 15 T/m Pole tip radius 180 mm Pole tip field 2.7 T Nominal length 550 (900) mm Yoke length 450 (800) mm Yoke outer diameter 1000 mm Pole end chamfer Width: 200 mm, Angle: 60° Total current ~ 300 kA Operation current ~ 160 A Coil cross section ~2100 mm 2 Bmax in the coil ~ 4.1 T Yoke mass 2.2 (3.9) ton Coil mass 120 (170) kg Field gradient: 15T/m LQ1 LQ2 Total (operation) current [kA, A] 309 (163) 298 (157) Effective length (mm) 530~550 869~900 Int(B6)/Int(B2) (%) -0.31~0.65 -0.38~0.46 Int(B10)/Int(B2) (%) -0.15~-0.09 -0.12~-0.06 Stored energy (kJ) 310 480 Inductance (H) 23~37 39~60 LTS Multipole Triplet Magnet Prototype LTS Q-magnet Specification of the LTS Q-Prototype LTS Q-SPC LTS S- & O-SPC Prototype HTS quadrupole magnet will be manufactured and tested later this year. Prototype LTS multipole triplet magnet will be manufactured and tested early next year. Dewar Type 2 stage Cooling Liquid He Radiation 0.13 W Support 0.65 W Current leads 1.68 W/10P He port 1.51 W Total 3.98 W 1 stage Cooling LN2 Radiation 8.43 W Support 12.34 W Current leads - He port 9.84 W Total 30.61 W Dewar Type Cooling Gas He Temperature 40 K Radiation 2.7 W Support 23.6 W/8P Current leads 63.6 W Beam tube 69.6 W Total 159.5 W Parameters Values Length 650 mm Width 360 mm Straight length 450 mm Turns 1900 Wire Size (Insulated) 1.26 mm Ｘ 0.86 mm Cu/SC ratio 5.3 : 1 Parameters Sextupole Octopole Length 650 mm 650 mm Straight length 450 mm 450 mm Thickness 6 mm 5 mm Turns 657 360 Wire size (Insulated) 0.65 mm (round) Cu/SC ratio 3.0 : 1 Cross-section of LTS Q-SPC Specification of LTS Q-SPC Quench training test of Q-SPCs Cross-section of LTS S- & O-SPC Specification of LTS S- & O-SPC Quench training test of S- & O-SPCs ■ Fabrication of LTS multipole singlet Iron Yoke Multipole singlet Multipole singlet test Experimental setup Conceptual Design of Helium Distribution for IF Separator Heat loss of HTS Q-magnet Heat loss of LTS multipole triplet magnet Schematic of local helium distribution for IF separator • Coil Ic : 110 A (1 uV/cm criterion) • Quench : 2 nd layer coil
