Development of Quadrupole, Steering and Corrector Magnets for the SIS 300

Tkachenko, L.; Bogdanov, I.; Shcherbakov, P.; Sytnik, V.V.; Tchikilev, A.; Зубко, В.

doi:10.1109/tasc.2009.2038931

Cited by 6 publications

(7 citation statements)

References 5 publications

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“…The main characteristics of the SC wires and cable are presented in [1], [2]. The coil is divided by three blocks, suppressing the first three multipoles in the approximation of infinitely high permeability in the iron yoke with the inner cylindrical surface.…”

Section: D Geometrymentioning

confidence: 99%

“…6; the derivatives depend on the spacer position in the end parts. These dependences are described by formula (2), where ; at normalized radius ; is the turn number and is the number of the shifted turns to the center of the magnet. At the same time, the normalized gradient field does not depend on the radius and has mild quadratic dependence on the position of the spacers (3).…”

Section: D Geometrymentioning

confidence: 99%

“…D EVELOPED in IHEP design of a superconducting (SC) fast-cycling quadrupole prototype [1], [2] is intended for further use as a main element of the magnetic structure for the SIS 300 [3]. The ramp rate of the gradient field is 10 T/m/sec in the range of 10-45 T/m.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the Factors Affecting Field Quality and Heat Releases of the Quadrupole Magnet for the SIS 300

Tkachenko

Shcherbakov

Sytnik

et al. 2011

IEEE Trans. Appl. Supercond.

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IHEP has developed a design of a superconducting quadrupole magnet for the SIS 300, project FAIR. The main parameters of this quadrupole are: 45-T/m central gradient with the gradient ramp rate of 10 T/m/sec in the useful aperture of 105 mm and the coil ID of 125 mm; the geometric length of the magnet is 1 m. This work includes the analysis of the factors affecting field quality and heat releases of the quadrupole magnet for the SIS 300. Particularly, influence of the weak magnetic elements of the design on the field quality in the magnet is examined as well as the effect of generated heat releases in the resistive parts on the temperature margin in the quadrupole. Tolerances for the manufacturing accuracy of various geometrical parameters are presented. Examination of the parameters affecting the integral field quality is described. Presented law of dependence of low integral field multipoles on both thickness of the spacer and its position in the end parts allows one to quickly find optimized geometry with a viewpoint of the integral field quality.

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Section: D Geometrymentioning

confidence: 99%

Section: D Geometrymentioning

confidence: 99%

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Analysis of the Factors Affecting Field Quality and Heat Releases of the Quadrupole Magnet for the SIS 300

Tkachenko

Shcherbakov

Sytnik

et al. 2011

IEEE Trans. Appl. Supercond.

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“…The results of the optimization of the geometry of the SIS300 quadrupole magnet are presented in [6,7]. The principal parameters of the magnet are: central gradient 45 T/m, ramping of field gradient 10 T/m/sec, working current 6.26 kA, maximum field in winding 3.51 T, temperature margin 1.54 K, stored energy 38 kJ, inductance 2 mH, number of turns in the winding 80, inner diameter of the winding 125 mm, banding thickness 22 mm, iron yoke diameter 52 mm, and effective length 1 m.…”

mentioning

confidence: 99%

“…The most stressed (with respect to heat release and heat inflow) superconducting dipole magnets have the lowest critical temperature in the SIS300 cycle 5.7 K [13]; in all other magnets the critical temperature is above 6 K [6]. For the nominal magnetic field in the cycle, the difference of the temperature of the winding of the dipole and single-phase helium is ~0.1 K [13]; therefore the maximum temperature of the single-phase helium cooling the superconducting winding of the dipole magnet must be about 4.6 K.…”

mentioning

confidence: 99%

Development of rapid-cycling superconducting magnets and the SIS300 cryogenic accelerator system

Ageyev¹,

Bogdanov²,

Zinchenko³

et al. 2012

At Energy

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The SIS300 ion synchrotron is the last stage of the FAIR facility for antiproton and ion research. Its magnet structure is based on rapid-cycling superconducting magnets, making it possible to increase the energy and time-averaged intensity of particle beams. In 2008, the Institute of High Energy Physics (IFVE) developed and successfully tested the SIS300 model dipole, which reached a central magnetic field 6.8 T with ramping 1.15 T/sec, which is higher than that of existing analogues. At the present time, the IHEP is developing with the financial support from Rosatom prototypes of rapid-cycling quadrupole and corrector magnets for SIS300 and is developing in collaboration with the Bochvar All-Russia Research Institute for Inorganic Materials (VNIINM) a superconducting conductor for these magnets and developing the SIS300 cryostating system, which will be built by Kriogenmash and Geliimash. The status of this work is presented.The SIS300 superconducting ion synchrotron is the last stage of the FAIR accelerator complex, where U 92+ ions are accelerated to energy 33 GeV/nucleon [1]. In the future, the synchrotron will be used as a stretching ring with the possibility of increasing the energy of U 28+ ions from 400 to 1000 MeV/nucleon with maximum intensity 1·10 12 ions/sec. As the principal magnetic structure of the synchrotron, superconducting rapid-cycling magnets make it possible to increase considerably the energy and time-averaged intensity of the accelerated ion beams.A temperature margin (minimum difference between the critical and working temperature) at 1 K in all operating regimes of the accelerator must be provided for stable operation of the superconducting rapid-cycling magnets. This is accomplished by decreasing the thermal losses and by effective cooling. The rate of change of the magnetic field in superconducting magnets of large charged-particle accelerators, for example, the Tevatron (USA), HEA (Germany, RHIC (USA), and LHC (Switzerland), with amplitude exceeding 3 T does not exceed 0.1 T/sec. Its 10-fold increase in SIS300 will increase considerably the heat losses in the winding and in the magnetic conductor. This will cause considerable heating of the superconducting winding, which will lower the temperature margin, and greatly increase the load on the cryogenic system and, as a consequence, increase the operational costs of operating the accelerator.

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