STATUS OF R

1
SUPERCONDUCTING MAGNETS for NICA BOOSTER
COLLIDER

• NICA ROUND TABLE DISCUSSION - 3

A.KOVALENKO
JINR, Dubna, November 05, 2008
2
NIKA GENERAL LAYOUT
A.Kovalenko
JINR, Dubna, November 05, 2008
3

• MAGNETS for the BOOSTER
• DIPOLES ? 1.8 ? L 2.2 m, curved ( sagitta
  21 ??),
• work aperture 130 ? 64 mm2 ( h x v ),
  number of magnets - 40
• QUADRUPOLES G 20 ?/m, L 0.4 m, aperture 130
  ? 66 mm2
• the number of magnets - 2 ? 24 48

• MAGNETS for the COLLIDER
• DIPOLES ? 4.0 ? L 3.0 ?, curved (sagitta
  60 ??),
• work aperture dimeter 80 mm, number of
  magnets 2 x 24.
• QUADRUPOLES G 34 ?/m, L 0.4 ?, aperture
  diameter 100 ??, number of quadrupoles 2 x 36

JINR, Dubna, November 05, 2008
A.Kovalenko
4

• 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
34 T/m, 68 T/m s, quad
2 T, 4 T/s, 1 Hz dipole
A.Kovalenko
JINR, Dubna, November 05, 2008
5
NUCLOTRON NbTi composite hollow cable

• Low degradation of the
• cable critical current in a fast ramping
  operation
• (4.8 . _at_ dB/dt4T/s)

• Weak dependence of the eddy current loss on the
  magnetic field ramp

JINR, Dubna, November 05, 2008
A.Kovalenko
6

• The Nuclotron technology of SC- cable and magnets
  was approved at GSI as the basis for the FAIR
  SIS100 synchrotron magnetic system
• DIPOLES ? 1.9 ? L 3.05 m, curved ( sagitta
  10 ??), f 1 Hz,
• work aperture 130 ? 64 mm2 ( h x v ),
  number of magnets - 108
• QUADRUPOLES G 27 ?/m, L 1.2 m, dG/dt 54
  T/ms, work aperture 130 ? 66 mm2 the number of
  magnets - 2 ? 84 168

• The Nuclotron technology of SC- cable is under
  study at CERN for the PS upgrade

JINR, Dubna, November 05, 2008
A.Kovalenko
7
Fast Cycled superconducting Magnets for PS2
(1)WAMSDO, May 23rd, 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
JINR, Dubna, November 05, 2008
A.Kovalenko
8
Fast Cycled superconducting Magnets for PS2
(2)WAMSDO, May 23rd, 2008.
JINR, Dubna, November 05, 2008
A.Kovalenko
9
Fast Cycled superconducting Magnets for PS2
(2)WAMSDO, May 23rd, 2008.
JINR, Dubna, November 05, 2008
A.Kovalenko
10
Status of the DUBNA FACILITY for
superconducting magnets manufacturing and tests
JINR, Dubna, November 05, 2008
A.Kovalenko
11

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

JINR, Dubna, November 05, 2008
A.Kovalenko
12

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

JINR, Dubna, November 05, 2008
A.Kovalenko
13

• MAGNET COILS MANUFACTURING TECHNOLOGY WAS
  RENEWED AT THE LABORATORY ALSO

JINR, Dubna, November 05, 2008
A.Kovalenko
14

• THE MAGNET IN THE CRYOSTAT AT THE TEST FACILITY

AFTER THE TESTS
BEFORE CLOSING THE CRYOSTAT
JINR, Dubna, November 05, 2008
A.Kovalenko
15

• SIS100 CURVED TWO-LAYER DIPOLE

• ASSEMBLING AND TEST IN DUBNA , SEPTEMBER 2008

JINR, Dubna, November 05, 2008
A.Kovalenko
16

• SIS100 THE MAIN QUADRUPOLE

• assembling the yoke ¼ (31/10/08)

• laser cut yoke lamination sheets

JINR, Dubna, November 05, 2008
A.Kovalenko
17
NICA Booster/Collider Synergy Design Approach
JINR, Dubna, November 05, 2008
A.Kovalenko
18

• 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 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 ?
1.52 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.
JINR, Dubna, November 05, 2008
A.Kovalenko
19

• 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 kA_at_ 4.5 T
JINR, Dubna, November 05, 2008
A.Kovalenko
20

• 4 T double layer cos theta style dipole

The option is taken for the further RD 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 kA _at_ 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
JINR, Dubna, November 05, 2008
A.Kovalenko
21
The RD 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 ? - 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, 2008
A.Kovalenko
22

• 4 T twin aperture curved cos theta style dipole

Preliminary cross section of the NICA collider
twin aperture dipole and quadrupole
JINR, Dubna, November 05, 2008
A.Kovalenko
23

• Proposed RD 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

JINR, Dubna, November 05, 2008
A.Kovalenko