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

A.KOVALEA.KOVALENKONKO

SUPERCONDUCTISUPERCONDUCTING NG

MAGNETS for MAGNETS for NICA BOOSTER & NICA BOOSTER &

COLLIDERCOLLIDER NICA ROUND TABLE DISCUSSION - 3

JINR, Dubna, November 05, 2008

A.Kovalenko

NIKA GENERAL NIKA GENERAL LAYOUTLAYOUT


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


design and construction of the Nuclotron provided to JINR the unique long-term experience in the technology of superconducting magnets

Low degradation of thecable 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 - 108

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


Fast Cycled superconducting Magnets for PS2 (1)WAMSDO, May 23rd, 2008. Presented by L.Bottura

The LHC Accelerator Chain

SPS commissioned in 1976

PS was built in 1959

G. Kirby, M. Karppinen, L. Oberli, R. G. Kirby, M. Karppinen, L. Oberli, R. Maccaferri, C. Maglioni, V. Parma, D. Maccaferri, C. Maglioni, V. Parma, D. Richter, G. de Rijk, L. Rossi, W. Richter, G. de Rijk, L. Rossi, W. Scandale, L. Serio, D. Tommasini )Scandale, L. Serio, D. Tommasini )


Fast Cycled superconducting Magnets for PS2 (2)WAMSDO, May 23rd, 2008.


Fast Cycled superconducting Magnets for PS2 (2)WAMSDO, May 23rd, 2008.


Status of the DUBNA FACILITY Status of the DUBNA FACILITY

for superconducting magnets for superconducting magnets manufacturing and testsmanufacturing and tests



• SC COIL WINDING TECHNOLOGY AT THE LABORATORY of HIGH ENERGY PHYSICS WAS BETTER ADOPTED FOR SERIAL PRODUCTION


• MAGNET YOKE PRODUCTION TECHNOLOGY WAS RENEWED AT THE JINR EXPERIMENTAL WORKSHOPS AND PRIVATE COMPANIES


• MAGNET COILS MANUFACTURING TECHNOLOGY WAS RENEWED AT THE LABORATORY ALSO


• 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


• SIS100: THE MAIN QUADRUPOLE

• assembling the yoke ¼ (31/10/08)

• laser cut yoke lamination sheets JINR, Dubna, November 05, 2008A.Kovalenko

NICA: NICA: Booster/ColliderBooster/Collider

Synergy Design ApproachSynergy Design Approach


Design approachThe 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 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 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 N2 or gaseous helium at 50-80 K.


•NICA BOOSTER/COLLIDER SYNERGY


•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 34 kA@ 4.5 T

Cross section of the dipole cold mass


• 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 17 kA @ 4.0 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 The R&D on 4T CURVED DIPOLES FOR NICA IS DIPOLES FOR NICA IS

STARTED at JINRSTARTED at JINR

· Basic goal is to construct and test · Basic goal is to construct and test a a high fieldhigh field ( up to 4 T) Cosine θ - style ( up to 4 T) Cosine θ - style curvedcurved dipole dipole magnet for the NICA collider rings. magnet for the NICA collider rings.

· High current hollow NbTi composite cable cooled · High current hollow NbTi composite cable cooled with two-phase He flow at T = 4.5 K is suppose to be with two-phase He flow at T = 4.5 K is suppose to be used for magnet coilused for magnet coil



• 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 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, 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


Documents

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