A.KOVALENKO SUPERCONDUCTING MAGNETS for NICA BOOSTER & COLLIDER NICA ROUND TABLE DISCUSSION - 3 JINR, Dubna, November 05, 2008

A.Kovalenko NIKA GENERAL LAYOUT JINR, Dubna, November 05, 2008

MAGNETS for the BOOSTER: 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: 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 JINR, Dubna, November 05, 2008A.Kovalenko

JINR NUCLOTRON A.Kovalenko Nuclotron fast-cycled superferric dipole and quadrupole magnets 2 T, 4 T/s, 1 Hz dipole 34 T/m, 68 T/m s, quad JINR, Dubna, November 05, 2008 design and construction of the Nuclotron provided to JINR the unique long-term experience in the technology of superconducting magnets

Low degradation of the cable critical current in a fast ramping operation (4.8 dB/dt=4T/s) NUCLOTRON: NbTi composite hollow cable Weak dependence of the eddy current loss on the magnetic field ramp JINR, Dubna, November 05, 2008A.Kovalenko

The Nuclotron technology of SC- cable and magnets was approved at GSI as the basis for the FAIR SIS100 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 QUADRUPOLES: G = 27 Т/m, L ~ 1.2 m, dG/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 JINR, Dubna, November 05, 2008A.Kovalenko

Fast Cycled superconducting Magnets for PS2 (1) WAMSDO, May 23 rd, Presented by L.Bottura The LHC Accelerator Chain SPS commissioned in 1976 PS was built in 1959 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 ) JINR, Dubna, November 05, 2008A.Kovalenko

Fast Cycled superconducting Magnets for PS2 (2) WAMSDO, May 23 rd, JINR, Dubna, November 05, 2008A.Kovalenko

Fast Cycled superconducting Magnets for PS2 (2) WAMSDO, May 23 rd, JINR, Dubna, November 05, 2008A.Kovalenko

Status of the DUBNA FACILITY for superconducting magnets manufacturing and tests JINR, Dubna, November 05, 2008A.Kovalenko

JINR, Dubna, November 05, 2008A.Kovalenko SC COIL WINDING TECHNOLOGY AT THE LABORATORY of HIGH ENERGY PHYSICS WAS BETTER ADOPTED FOR SERIAL PRODUCTION

JINR, Dubna, November 05, 2008A.Kovalenko MAGNET YOKE PRODUCTION TECHNOLOGY WAS RENEWED AT THE JINR EXPERIMENTAL WORKSHOPS AND PRIVATE COMPANIES

JINR, Dubna, November 05, 2008A.Kovalenko MAGNET COILS MANUFACTURING TECHNOLOGY WAS RENEWED AT THE LABORATORY ALSO

JINR, Dubna, November 05, 2008A.Kovalenko THE MAGNET IN THE CRYOSTAT AT THE TEST FACILITY AFTER THE TESTS BEFORE CLOSING THE CRYOSTAT

SIS100: CURVED TWO-LAYER DIPOLE ASSEMBLING AND TEST IN DUBNA, SEPTEMBER 2008 JINR, Dubna, November 05, 2008A.Kovalenko

SIS100: THE MAIN QUADRUPOLE assembling the yoke ¼ (31/10/08) laser cut yoke lamination sheets JINR, Dubna, November 05, 2008A.Kovalenko

NICA: Booster/Collider Synergy Design Approach JINR, Dubna, November 05, 2008 A.Kovalenko

Design approach The new idea was presented first at the EUCAS Conference in It was motivated by the desire to find cost effective approach to the design of superconducting magnets for SIS200 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, SIS100 and SIS200 respectively, was discussed at that time. The proposed magnet would have a circular aperture of mm diameter. A single layer coil, made of hollow superconducting Nuclotron – type cable, will be used. The number of turns in the coil is 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 N2 or gaseous helium at K. JINR, Dubna, November 05, 2008A.Kovalenko NICA BOOSTER/COLLIDER SYNERGY

JINR, Dubna, November 05, 2008A.Kovalenko 4 T single layer cos theta –style dipole 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 T Cross section of the dipole cold mass

JINR, Dubna, November 05, 2008A.Kovalenko 4 T double layer cos theta –style dipole 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 T The option is taken for the further R&D study and optimization of the NICA collider dipole magnet Conceptual cross section of the dipole cold mass 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.

The R&D on 4T 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 NbTi composite cable cooled with two-phase He flow at T = 4.5 K is suppose to be used for magnet coil · 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 NbTi composite cable cooled with two-phase He flow at T = 4.5 K is suppose to be used for magnet coil JINR, Dubna, November 05, 2008A.Kovalenko

JINR, Dubna, November 05, 2008A.Kovalenko 4 T twin aperture curved cos theta –style dipole Preliminary cross section of the NICA collider twin aperture dipole and quadrupole

Proposed R&D program for September March: Design of a short (1-1.2)m length straight and curved single bore model dipoles ( 2-layer coil, 80-mm inner diameter, 4T 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 JINR, Dubna, November 05, 2008A.Kovalenko