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SPD Magnetic System

SPIN-Praha-2018. SPD Magnetic System. A.Kovalenko for the SPD group JINR (Dubna). International Workshop on Spin Physics at NICA. Prague , 09-13 July, 2018. SPD MS: General remarks.

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SPD Magnetic System

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  1. SPIN-Praha-2018 SPD Magnetic System A.Kovalenko for the SPD group JINR (Dubna) International Workshop on Spin Physics at NICA Prague, 09-13 July, 2018

  2. SPD MS: General remarks • Discussion about the choice of SPD MS has some history. Two options were mainly discussed. These are: solenoid and toroid. • Since the beginning 2018 the group involved in preparation of the SPD Conceptual Design also came to the problem of that choice. • Basic criteria of the system design were approvedthe Committee meeting in February 2018. A.D.Kovalenko et al Workshop on Spin Physics at NICA, July 08-14, Prague

  3. Basic criteria to the SPD MS choice • universality • minimal influence on beam particles spin • minimization of the MS material inside the detector • field integral of (1-2) T·m along the particle track • minimization of the SPD total weight and sizes Seven options have been considered A.D.Kovalenko et al Workshop on Spin Physics at NICA, July 08-14, Prague

  4. SPD updated composition A.D.Kovalenko et al Workshop on Spin Physics at NICA, July 08-14, Prague

  5. SPD MS considered options • solenoid (placed outside ECal); • Toroid (inside ECal): 1) barrel part, 2) barrel+2 end parts, 3) warm coils, 4) superconducting coils; • 4 separate coils inside the ECal; • combination of the barrel toroid and 2 pairs of the coils inside the ECal. A.D.Kovalenko et al Workshop on Spin Physics at NICA, July 08-14, Prague

  6. SPD Solenoidal MS (1) Well-known for NICA design exists: see MPD solenoid, the design have been performed, manufacturing is in progress. It’s contribution of Chech Rep. (Vitkovice machinery plant) and ASG company (Italy). Main disadvantages of solenoid MS are: 1) magnetic field at the beam axis, 2) no any universality. A.D.Kovalenko et al Workshop on Spin Physics at NICA, July 08-14, Prague

  7. SPD Solenoidal MS (2) MPD setup. Solenoid outside of all detectors. Some mechanical parts of MPD manufactured at Ostrava plant. A.D.Kovalenko et al Workshop on Spin Physics at NICA, July 08-14, Prague

  8. SPD Toroidal Magnetic System (1) A.D.Kovalenko et al Workshop on Spin Physics at NICA, July 08-14, Prague 8

  9. SPD Toroidal Magnetic System (2) Cross sections of warm and SC-coil A.D.Kovalenko et al Workshop on Spin Physics at NICA, July 08-14, Prague

  10. SPD MS: Nuclotron/ITER technology Dubna hollow SC cable NICA booster magnets We have unique technology and technological base for manufacturing SPD MS model coils at the LHEP. Operating current – 10 kA Critical current -17 kA A.D.Kovalenko et al Workshop on Spin Physics at NICA, July 08-14, Prague 10

  11. SPD Toroidal Magnetic System (3) - 3D-magnetic field distribution was calculated for the both cases: - The system complexity is high A.D.Kovalenko et al Workshop on Spin Physics at NICA, July 08-14, Prague

  12. SPD Toroidal Magnetic System (4) - First proposal was:warm copper coils, nevertheless the coil cross section is too large for the providing of 400 kA∙turns in each coil that is necessary to obtain the specified field. - The next step was:SC-coils, based on a hollow NbTi composite cable, like that have been designed for the Nuclotron or take the design approach used usually for tokomak setups. A.D.Kovalenko et al Workshop on Spin Physics at NICA, July 08-14, Prague

  13. SPD Separate Coils MS (1) 3D-field distribution taking the iron shield outside was calculated for different current directions in the coils Zero field at the center of system is in the case of opposite current direction of the coil pairs. Separation of barrel and end parts of the setup is possible also. A.D.Kovalenko et al Workshop on Spin Physics at NICA, July 08-14, Prague

  14. SPD Separate Coils MS (1) 3D-field distribution taking the iron shield outside was calculated for different current directions in the coils Coil system is practically transparent for secondary particals, but better to form azimuthal field for barrel part of the detector. A.D.Kovalenko et al Workshop on Spin Physics at NICA, July 08-14, Prague

  15. SPD Combined MS (1) Backward coils Forward coils Toroid coils Workshop on Spin Physics at NICA, July 08-14, Prague A.D.Kovalenko et al

  16. SPD Combined MS (2) Z = 2800 mm Z = 1600 mm Workshop on Spin Physics at NICA, July 08-14, Prague A.D.Kovalenko et al

  17. SPD Combined MS (3) A.D.Kovalenko et al Workshop on Spin Physics at NICA, July 08-14, Prague

  18. SPD MS used for modeling A.D.Kovalenko et al Workshop on Spin Physics at NICA, July 08-14, Prague

  19. SPD Combined MS (4) No symmetry Backward coils Forward coils Toroid coils A.D.Kovalenko et al Workshop on Spin Physics at NICA, July 08-14, Prague

  20. SPD Combined MS (5) Z = 2800 mm Z = 1600 mm СЬЫCMS Workshop on Spin Physics at NICA, July 08-14, Prague A.D.Kovalenko et al

  21. SPD MS: further steps • Perform the new set of calculations after upgrade of the setup composition; • Start preparations to R&D on technical design of the MS system including SC-wire, cable and coil design. A.D.Kovalenko et al Workshop on Spin Physics at NICA, July 08-14, Prague

  22. Thanks a lot for your attention A.D.Kovalenko et al Workshop on Spin Physics at NICA, July 08-14, Prague

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