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ABSTRACT: 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.
IEEE Transactions on Appiled Superconductivity 07/2011; · 1.04 Impact Factor
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S. Kozub,
I. Bogdanov,
V. Pokrovsky,
A. Seletsky,
P. Shcherbakov,
L. Shirshov,
V. Smirnov,
V. Sytnik, L. Tkachenko,
V. Zubko,
E. Floch,
G. Moritz,
H. Mueller
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ABSTRACT: FAIR (Facility for Antiproton and Ion Research), planned to be built at the site of GSI will include the 300 Tm fast-ramping heavy ion synchrotron SIS 300. In the frame of a collaboration between IHEP (Protvino, Russia) and GSI (Darmstadt, Germany) IHEP developed, produced and tested a superconducting model dipole. The main parameters of the dipole are a two-layer coil, 100 mm inner coil diameter and 1 m length. The magnet is designed for 6 T central magnetic field with a 1 T/s operating field ramp rate. The nominal operating current of 6720 A (6 T central magnetic field) was reached after the third quench and critical current of 7738 A (6.8 T central magnetic field) was reached after the eighteenth quench. The critical current of the dipole did not reduce up to ramp rate of 1300 A/s (1.15 T/s). AC losses for different magnetic field cycles were measured too.
IEEE Transactions on Appiled Superconductivity 07/2010; · 1.04 Impact Factor
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ABSTRACT: In the frame of collaboration in the FAIR project IHEP has developed a design of a fast cycling quadrupole, which will be assembled together with corrector magnets in the united cryostat. This quadrupole is intended as the main unit for the SIS 300 ring. The 1-layer coil of the quadrupole is divided in three blocks and will be wound by a cored cable with 19 strands. The quadrupole creates a 45-T/m central gradient in 105-mm aperture. A possible simple quench protection scheme is shortly discussed with relation to the features of the developed quadrupole design. There will be various types of steering and corrector magnets in the SIS 300 ring. The geometries of the corrector and steering magnets are presented as well as their main magnetic parameters.
IEEE Transactions on Appiled Superconductivity 07/2010; · 1.04 Impact Factor
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ABSTRACT: Main parameters for the SIS300 quadrupole, GSI, Darmstadt, project FAIR, are 45 T/m central gradient in 105-mm aperture, the effective length of the quadrupole is 1 m. Optimized geometric parameters of 1-layer magnet are presented both in the cross section and end parts. The coil consists of 3 blocks in one quadrant. Collars are a self-supporting mechanical structure. Integral multipoles are suppressed by central harmonics. Thermal and mechanical characteristics of the magnet are also presented.
IEEE Transactions on Appiled Superconductivity 07/2009; · 1.04 Impact Factor
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ABSTRACT: Some technological and design peculiar properties have been discovered during working out design drawings and tooling for production of a short dipole model, which is being developed for synchrotron SIS 300, the FAIR project, GSI. These peculiarities should be taken into consideration during development of a full-scale prototype of the dipole. These features are related to both 2D and 3D geometries. This article presents some improvements that allow enhancing magnetic and mechanical characteristics, simplify processing complexity, and increase reliability and efficiency of the new design. Specifically, the field quality in the cross section is ameliorated. The length of the end parts is shortened, which gives larger effective length of the dipole.
IEEE Transactions on Appiled Superconductivity 07/2008; · 1.04 Impact Factor
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ABSTRACT: Thermal stability for superconducting fast-cycling dipoles will play a vital role. The coupled numerical simulation of electromagnetic and thermal processes in Rutherford superconducting cables during the initiation of a quench was carried out. The network model has been combined with thermal analysis, which allows one to model quench dynamics, including the effects of current redistribution in strands, discontinuities and inhomogeneity, the initial heating in strand, and as results occasional quench recovery or runaway quench propagations.
Journal of Physics Conference Series 03/2008; 97(1):012074.
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J. Kaugerts,
G. Moritz,
M.N. Wilson,
A. Ghosh,
A. den Ouden,
I. Bogdanov,
S. Kozub,
P. Shcherbakov,
L. Shirshov, L. Tkachenko,
D. Richter,
A. Verweij,
G. Willering,
P. Fabbricatore,
G. Volpini
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ABSTRACT: GSI, Darmstadt is preparing to build FAIR (Facility for Antiproton and Ion Research) which include SIS 300, a 300T - m fast-ramping heavy ion synchrotron. Dipoles for this ring will be 2.9 m long, producing 6 T over a 100 mm coil aperture and ramped at 1 T/s. The cable for these dipoles must have low losses and produce acceptable field distortions during the fast ramp. We plan to achieve this objective by using fine (~ 3 mum) filaments of NbTi in a wire with an interfilamentary matrix of CuMn to reduce proximity coupling and increase the transverse resistivity. The Rutherford cable have a thin stainless steel core and the wires will be coated with SnAg solder which has been oxidized, using a recipe similar to that developed at CERN, to increase the adjacent strand resistance Ra. Measurements of crossover strand resistance Re and Ra in cored cable with oxidized SnAg coating will be presented, together with data on critical current, persistent current magnetization and eddy current coupling in a wire with ultra fine filaments and a CuMn matrix in the interfilamentary region of the wire. These data will be used to predict losses and field distortion in the SIS 300 dipole and optimize the final design of cable for FAIR.
IEEE Transactions on Appiled Superconductivity 07/2007; · 1.04 Impact Factor
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ABSTRACT: The synchrotron SIS 300, developed for the Facility for Antiproton and Ion Research (FAIR) project at GSI, will use fast-cycling dipoles with 100 mm inner diameter coils, magnetic field amplitude of 6 T and a ramp rate of 1 T/s. This work presents the calculations of the magnetic and thermal characteristics of a 1 m model dipole with optimized 2D and 3D geometries. AC losses in the coil and iron yoke, as well as temperature margins, were analyzed. Production tolerances for the main geometrical parameters were also studied.
IEEE Transactions on Appiled Superconductivity 07/2007; · 1.04 Impact Factor
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ABSTRACT: An important part of FAIR (Facility for Antiproton and Ion Research), being developed at GSI, Darmstadt, Germany, is the fast-ramping heavy ion synchrotron SIS 300. The main elements of the SIS 300 magnetic system are 6 T, 2.6 m long superconducting dipoles, to guide charged particle beams on a path with a 50 m curvature radius. A model superconducting dipole, manufactured for the UNK project, was chosen to study the influence of bending on the magnet characteristics. The straight collared coil of this model magnet was tested, then bent with a 50 m curvature radius, and then retested. The main measured and calculated characteristics of the coil for both tests are presented. Test results showed similar characteristics, both in training and in ramp rate dependence, as well as in field quality of the straight and bent coils. There is a good agreement between measured and calculated results of the completed study
IEEE Transactions on Appiled Superconductivity 07/2006; · 1.04 Impact Factor
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ABSTRACT: The last stage of the GSI Fast-Pulsed Synchrotron Project for FAIR (Facility for Antiproton and Ion Research) is the SIS 300 ring, which will use superconducting dipoles with 100mm aperture, 6 T magnetic field amplitude and 1 T/s field ramp rate. Stringent requirements on physical parameters and on the dependable service of the dipole necessitated using a cable with increased current carrying capability and low dynamic losses. A suitable geometry of the superconducting cable was found in that used for the outer layer of the Large Hadron Collider superconducting main dipole, supplemented by a stainless steel core for the reduction of the transverse contact resistance between the strands. The shape of the partially keystoned cable demands numerical methods for the optimization of the geometry in adaptation to the wide aperture dipole. The main characteristics of the optimized 2D and 3D geometry of the dipole are presented. Two grades of iron yoke steel were analyzed for use, in view of their resulting field quality. Thermal analysis of the dipole was carried out
IEEE Transactions on Appiled Superconductivity 07/2006; · 1.04 Impact Factor
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J.E. Kaugerts,
G. Moritz,
C. Muehle,
A. Ageev,
I. Bogdanov,
S. Kozub,
P. Shcherbakov,
V. Sytnik, L. Tkachenko,
V. Zubko,
D. Tommasini,
M.N. Wilson,
W. Hassenzahl
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ABSTRACT: Gesellschaft fur Schwerionenforschung (GSI) is planning to build FAIR (Facility for Antiproton and Ion Research) in Darmstadt, Germany . This facility will include SIS 300, a fast-ramping heavy ion synchrotron with a rigidity of 300 T-m, with 6 T, 100 mm coil aperture 2.6 m long superconducting dipoles, ramped at 1 T/s . The fast ramp rate requires a magnet design that minimizes AC losses and field distortions during ramping. A two layer cos θ magnet design, using a cored Rutherford cable, has been chosen. The paper will present the features of the magnet design that is to be built, the expected AC losses and field quality, and the experimental and analytical work that supports the choice of this design.
IEEE Transactions on Appiled Superconductivity 07/2005; · 1.04 Impact Factor
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V. Shiltsev,
X.L. Zhang,
G. Kuznetsov,
H. Pfeffer,
G. Saewert,
A. Semenov,
D. Wolff,
R. Hively,
V. Kamerdzhiev,
A. Martinez,
A. Klebaner,
K. Bishofberger,
F. Zimmermann,
M. Tiunov, A. Kuzmin,
I. Bogdanov,
E. Kashtanov,
S. Kozub,
V. Sytnik, L. Tkachenko
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ABSTRACT: In this paper, we report the progress of the Tevatron Beam-Beam Compensation (BBC) project [1]. Proton and antiproton tuneshifts of the order of 0.009 induced by electron beam have been reported in [2], suppression of an antiproton emittance growth in the Tevatron High Energy Physics (HEP) store has been observed, too [1]. Currently, the first electron lens (TEL1) is in operational use as the Tevatron DC beam cleaner. Over the last two years, we have greatly improved its reliability. The 2nd Tevatron electron lens (TEL2) is under the final phase of development and is being prepared for installation in the Tevatron in 2005.
Particle Accelerator Conference, 2005. PAC 2005. Proceedings of the; 06/2005
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ABSTRACT: Short models of the UNK superconducting dipole reached a maximum central field of 6.5 T with 0.8 T/s ramp rate. It allows one to consider this magnet design as a basis for development of a superconducting dipole, which will have low heat loss and could be used for the production of fast-cycling magnetic fields, with 6T amplitude and 1 T/s ramp rate, for the new GSI synchrotron SIS-300. The dipole geometry makes it possible to independently suppress both central field and integral field low-order harmonics. The specific shape of the coil end parts enables a decrease of the maximum field in the end parts to the level in the straight part of the coil. Analyzes of magnet AC heating during the SIS-300 cycle, as well as heat transfer to the helium coolant, are presented. The magnet temperature margin and methods to increase it are discussed.
IEEE Transactions on Appiled Superconductivity 07/2004; · 1.04 Impact Factor
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X. Zhang,
J. Crisp,
J. Fitzgerald,
G. Kuznezov,
M. Olson,
H. Pfeffer,
G. Saewer,
A. Semenov,
V. Shiltsev,
N. Solyak,
D. Wildman,
K. Bishofberger,
E. Kashtanov,
S. Kozub, L. Tkachenko,
Sytnik,
M. Tiunov
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ABSTRACT: This paper will describe the main upgrades of the Tevatron Electron Lens (TEL) during the year 2003. The bending angle of the electron beam entrance and exit to the main solenoid will be decreased from 90 degrees to 53 degrees and three more solenoids will be added to each of the two bends, which will allow us to control the electron beam size more freely. A new gun will also be installed which will give us a Gaussian transverse beam distribution in addition to the flat beam with much smoother edge to minimize the nonlinear effect of the beam-beam force. In addition, a new BPM system will be installed to let us have more precise beam position measurements for proton, antiproton and electron beams. A knife-edge beam profile measurement system will replace the space-consuming scanning wires. We expect that these upgrades will improve the ability to increase the lifetime of the (anti)proton beam during beam-beam compensation operation.
Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the; 06/2003
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ABSTRACT: The Tevatron Electron Lens (TEL) installed in the Tevatron at FNAL
bends a 10-keV electron beam into and out of the antiproton path. The
stringent requirements of the electron beam path demand extremely
straight magnetic field lines over roughly two meters which then bend
away to the gun and collector. A 6-Tesla superconducting solenoid and
two normal-conducting solenoids, supplemented with several dipole and
quadrupole correctors, were constructed at IHEP and subsequently
assembled and tested at FNAL. Several testing methods, with an
resolution of approximately 2 grad, confirmed the field profile to match
computer models and meet necessary constraints. Visual inspection of the
beam position and size on screens confirmed the measurements. This paper
analyzes these results and relates them to the system requirements
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001; 02/2001
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A. Ageev,
I. Bogdanov,
R. Hively,
S. Kozub,
G. Kuznetsov,
E. Kashtanov,
A. Martinez,
V. Pleskach,
H. Pfeffer,
A. Sery,
V. Shiltsev,
V. Sytnik, L. Tkachenko,
D. Wolff,
S. Zintchenko,
V. Zubko
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ABSTRACT: In the framework of collaboration between IHEP and FNAL, a
magnetic system of the Tevatron Electron Lens (TEL) has been designed
and built. The TEL is currently installed in the superconducting ring of
the Tevatron proton-antiproton collider and used for experimental
studies of beam-beam compensation
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001; 02/2001
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ABSTRACT: As part of Fermilab Neutrino Factory study, a preliminary analysis
has been made to realize the feasibility and complexity of the magnetic
systems for the drift channel, phase rotation channel, and cooling
channel. For each channel, a simple optimization was made with the goal
of reducing its cost. Although design and implementation of every
channel discussed above is a nonstandard technical task, one can expect
to meet the most challenging problems working with the cooling channel.
Both radial and axial ponderomotive forces in this channel are extremely
large as well as the interacting forces acting on the first and the last
magnets in the string. Because the mechanical behavior of a magnet in
this channel is the main issue to study, thorough modeling of the system
is a must in this case. Other objects of study are optimization of the
quench protection system and analysis of stresses in coils during
cooling down and warming up. Undoubtedly, modeling and prototyping of
the channel magnets must accompany development of magnetic systems for
the Neutrino Factory front end
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001; 02/2001
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I. Bogdanov,
S. Kozub,
K. Myznikov,
A. Seletskiy,
P. Shcherbakov,
P. Slabodchikov,
P.S.V. Sytnik, L. Tkachenko,
V. Zubko,
I. Akimov,
A. Shikov
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ABSTRACT: The dipole magnet having a current carrying element, using a tape
composite conductor on base of high temperature superconducting ceramics
Bi2223 embedded in a silver matrix has been developed. The operating
field of the dipole is 1 T at temperature of liquid nitrogen. The main
characteristics of the used high temperature superconducting tape are
displayed. The cross-section geometry optimization with goals to reduce
field nonlinearities in aperture up to 10<sup>-4</sup> and to minimize
the value of magnetic field on the coil was carried out. The main
results of the numerical simulations as well as of the properties of
high temperature superconductors are presented
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001; 02/2001
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N. Holtkamp,
DA Finley,
T Anderson,
N. Andreev,
CM Ankenbrandt,
S. Assadi,
M Atac,
C Bhat,
VI Balbekov,
R Bernstein, [......],
G Krafft,
V. Lebedev,
C. Leemann,
L. Merminga,
WR Leeson,
A Mahmood,
T. Patzak,
RV Kowalewski,
VD Barger,
T Han
