SUPERCONDUCTING MAGNETS for NICA BOOSTER COLLIDER l NICA
SUPERCONDUCTING MAGNETS for NICA BOOSTER & COLLIDER l NICA ROUND TABLE DISCUSSION - 3 A. KOVALENKO JINR, Dubna, November 05, 2008
NIKA GENERAL LAYOUT A. Kovalenko JINR, Dubna, November 05, 2008
MAGNETS for the BOOSTER: l DIPOLES: В = 1. 8 Т; L ~ 2. 2 m, curved ( sagitta ~ 21 мм), work aperture 130 х 64 mm^2 ( h x v ), number of magnets - 40 QUADRUPOLES: G = 20 Т/m, L ~ 0. 4 m, aperture 130 х 66 mm^2 the number of magnets - 2 х 24 = 48 MAGNETS for the COLLIDER: l DIPOLES : В = 4. 0 Т; L ~ 3. 0 м, curved (sagitta ~ 60 мм), work aperture dimeter ~ 80 mm, number of magnets – 2 x 24. QUADRUPOLES: G ~ 34 Т/m, L ~ 0. 4 м, aperture diameter 100 мм, number of quadrupoles – 2 x 36 A. Kovalenko JINR, Dubna, November 05, 2008
• JINR NUCLOTRON design and construction of the Nuclotron provided to JINR the unique long-term experience in the technology of superconducting magnets Nuclotron fast-cycled superferric dipole and quadrupole magnets 2 T, 4 T/s, 1 Hz dipole A. Kovalenko 34 T/m, 68 T/m s, quad JINR, Dubna, November 05, 2008
NUCLOTRON: Nb. Ti composite hollow cable Low degradation of the cable critical current in a fast ramping operation (4. 8 %. @ d. B/dt=4 T/s) l l A. Kovalenko Weak dependence of the eddy current loss on the magnetic field ramp JINR, Dubna, November 05, 2008
The Nuclotron technology of SC- cable and magnets was approved at GSI as the basis for the FAIR SIS 100 synchrotron magnetic system: DIPOLES: В = 1. 9 Т; L ~ 3. 05 m, curved ( sagitta ~ 10 мм), f = 1 Hz, work aperture 130 х 64 mm^2 ( h x v ), number of magnets - 108 QUADRUPOLES: G = 27 Т/m, L ~ 1. 2 m, d. G/dt = 54 T/m·s, work aperture 130 х 66 mm^2 the number of magnets - 2 х 84 = 168 The Nuclotron technology of SC- cable is under study at CERN for the PS upgrade A. Kovalenko JINR, Dubna, November 05, 2008
Fast Cycled superconducting Magnets for PS 2 (1) WAMSDO, May 23 rd, 2008. Presented by L. Bottura The LHC Accelerator Chain G. Kirby, M. Karppinen, L. Oberli, R. Maccaferri, C. Maglioni, V. Parma, D. Richter, G. de Rijk, L. Rossi, W. Scandale, L. Serio, D. Tommasini ) PS was built in 1959 SPS commissioned in 1976 A. Kovalenko JINR, Dubna, November 05, 2008
Fast Cycled superconducting Magnets for PS 2 (2) WAMSDO, May 23 rd, 2008. A. Kovalenko JINR, Dubna, November 05, 2008
Fast Cycled superconducting Magnets for PS 2 (2) WAMSDO, May 23 rd, 2008. A. Kovalenko JINR, Dubna, November 05, 2008
Status of the DUBNA FACILITY for superconducting magnets manufacturing and tests A. Kovalenko JINR, Dubna, November 05, 2008
• SC COIL WINDING TECHNOLOGY AT THE LABORATORY of HIGH ENERGY PHYSICS WAS BETTER ADOPTED FOR SERIAL PRODUCTION A. Kovalenko JINR, Dubna, November 05, 2008
• MAGNET YOKE PRODUCTION TECHNOLOGY WAS RENEWED AT THE JINR EXPERIMENTAL WORKSHOPS AND PRIVATE COMPANIES A. Kovalenko JINR, Dubna, November 05, 2008
• MAGNET COILS MANUFACTURING TECHNOLOGY WAS RENEWED AT THE LABORATORY ALSO A. Kovalenko JINR, Dubna, November 05, 2008
• THE MAGNET IN THE CRYOSTAT AT THE TEST FACILITY AFTER THE TESTS BEFORE CLOSING THE CRYOSTAT A. Kovalenko JINR, Dubna, November 05, 2008
• SIS 100: CURVED TWO-LAYER DIPOLE • ASSEMBLING AND TEST IN DUBNA , SEPTEMBER 2008 A. Kovalenko JINR, Dubna, November 05, 2008
• SIS 100: THE MAIN QUADRUPOLE • assembling the yoke ¼ (31/10/08) • laser cut yoke lamination sheets A. Kovalenko JINR, Dubna, November 05, 2008
NICA: Booster/Collider Synergy Design Approach A. Kovalenko JINR, Dubna, November 05, 2008
• NICA BOOSTER/COLLIDER SYNERGY Design approach The new idea was presented first at the EUCAS Conference in 2001. It was motivated by the desire to find cost effective approach to the design of superconducting magnets for SIS 200 synchrotron at GSI. A dual-ring synchrotron in one tunnel, with maximum rigidities of 100 and 200 Tm for a maximum dipole field of 2 and 4 Tesla, SIS 100 and SIS 200 respectively, was discussed at that time. The proposed magnet would have a circular aperture of 100 -110 mm diameter. A single layer coil, made of hollow superconducting Nuclotron – type cable, will be used. The number of turns in the coil is 12 -14. The angular distribution of the turns, as well as the yoke internal boundary will be chosen to minimize the higher field harmonics. The cold mass (T = 4. 5 K), consisting of a superconducting coil, a reinforcing shell (collar) and a beam pipe is fabricated as a common rigid block, separated from the iron yoke (or its major part) by a small vacuum gap (t 1. 5– 2 mm). The coil is cooled with two-phase helium flow. The iron yoke/shield is cooled with liquid N 2 or gaseous helium at 50 -80 K. A. Kovalenko JINR, Dubna, November 05, 2008
• 4 T single layer cos theta –style dipole Cross section of the dipole cold mass The needed uniformity of the magnetic field is achieved by optimization of both proper distribution of the turns and transformation of the iron shield internal shape, nevertheless, the cable operating current is about 34 k. A@ 4. 5 T A. Kovalenko JINR, Dubna, November 05, 2008
• 4 T double layer cos theta –style dipole The option is taken for the further R&D study and optimization of the NICA collider dipole magnet The needed uniformity of the magnetic field is expected to be achieved by optimization of both proper distribution of the turns and transformation of the iron shield internal shape, like for single-layer one while the cable operation current will not exeed 17 k. A @ 4. 0 T The use of a hollow tube cable make it possible 1) to produce a curved coil and 2) to provide very efficient cooling of a superconducting wires. Conceptual cross section of the dipole cold mass A. Kovalenko JINR, Dubna, November 05, 2008
The R&D on 4 T CURVED DIPOLES FOR NICA IS STARTED at JINR · Basic goal is to construct and test a high field ( up to 4 T) Cosine θ - style curved dipole magnet for the NICA collider rings. · High current hollow Nb. Ti composite cable cooled with two-phase He flow at T = 4. 5 K is suppose to be used for magnet coil A. Kovalenko JINR, Dubna, November 05, 2008
• 4 T twin aperture curved cos theta –style dipole Preliminary cross section of the NICA collider twin aperture dipole and quadrupole A. Kovalenko JINR, Dubna, November 05, 2008
Proposed R&D program for 2008 -2010 • 2008 September - 2009 March: Design of a short (1 -1. 2)m length straight and curved single bore model dipoles ( 2 -layer coil, 80 mm inner diameter, 4 T field, 12 m bending radius) • 2009: January – September: Manufacturing of single bore model dipoles • 2009 October – 2010 March: Assembling and test of the model dipoles, upgrade of the first design, analysis of the results • 2010: March-December : Manufacturing of full-size twin bore dipole prototype A. Kovalenko JINR, Dubna, November 05, 2008
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