A Test of a 2 Tesla Superconducting Transmission Line Magnet System

Piekarz, H.; Carcagno, R.; Claypool, Brad; Foster, G. W.; Hays, S.; Huang, Y.; Kashikhin, V.V.; Malamud, E.; Mazur, Péter; Nehring, R.; Oleck, A.; Rabehl, R.; Schlabach, P.; Sylvester, C.; Velev, G.; Volk, J.; Wake, M.

doi:10.1109/tasc.2006.871285

Cited by 16 publications

(10 citation statements)

References 7 publications

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“…The precise spacing of the two yoke structure is set by non-magnetic stainless steel bars, and the halves are welded together with non-magnetic plates at the inner radius. Details and history of the design are reported elsewhere [2]- [5], the last of which is presented at this conference.…”

Section: Introductionmentioning

confidence: 99%

Field Quality Measurements of a 2-Tesla Transmission Line Magnet

Velev

Foster

Kashikhin

et al. 2006

IEEE Trans. Appl. Supercond.

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Abstract-A prototype 2-Tesla superconducting transmission line magnet for future hadron colliders was designed, built and tested at Fermilab. The 1.5 m long, combined-function gradientdipole magnet has a vertical pole aperture of 20 mm. To measure the magnetic field quality in such a small magnet aperture, a specialized rotating coil of 15.2 mm diameter, 0.69 m long was fabricated. Using this probe, a program of magnetic field quality measurements was successfully performed. Results of the measurements are presented and discussed.

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Section: Introductionmentioning

confidence: 99%

Field Quality Measurements of a 2-Tesla Transmission Line Magnet

Velev

Foster

Kashikhin

et al. 2006

IEEE Trans. Appl. Supercond.

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“…Since there is no 100 kA current transducer, total current had to be determined by adding the output of each current cells. The detail of the experimental set-up is described elsewhere [2]. …”

Section: Experimental Set Upmentioning

confidence: 99%

“…A 1.5 m long, twin-aperture, combined function gradient dipole magnet of 2 T field is excited by a single-turn 100 kA superconducting transmission line [2]. The force free design of this type of magnet has a great advantage in the cryogenic efficiency and simplicity of the structure making construction of very high-energy accelerator, such as VLHC, realistic.…”

Section: Introductionmentioning

confidence: 99%

A Short Model Excitation of an Asymmetric Force Free SuperconductingTransmission Line Magnet

Wake

Sato

Carcagno

et al. 2006

IEEE Trans. Appl. Supercond.

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Abstract-A short model of asymmetric force free magnet with single beam aperture was tested at Fermilab together with the excitation test of VLHC transmission line magnet. The design concept of asymmetric force free superconducting magnet was verified by the test. The testing reached up to 104 kA current and no indication of force imbalance was observed. Since the model magnet length was only 10cm, A 0.75m model was constructed and tested at KEK with low current to ensure the validity of the design. The cool down and the excitation at KEK were also successful finding very small thermal contraction of the conductor and reasonable field homogeneity.Index Terms-VLHC, transmission line magnet, asymmetric, low field superconducting magnet, force free design.

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“…The inductance L scales as N 2 with the number of turns and the minimal one can be achieved with a single-turn cable but for the required field B in the gap of the magnet very high current I conductor may be needed as I~B/L. For example, 2 T field has been achieved in the 20 mm double-gap superferric DC magnet with 100 kA current in a NbTi-based single-turn power cable 23 . For the fast-cycling operation, the power supply voltage V grows with dI/dt and can be prohibitively large, therefore, to optimize technical feasibility and cost of such power supply some compromise between the magnet current and the magnet inductance is required.…”

mentioning

confidence: 99%

Record Fast-Cycling Accelerator Magnet Based on High-Temperature Superconductor [Poster]

Piekarz

Hays

Blowers

et al. 2019

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Four decades ago development of high-current superconducting NbTi wire cables revolutionized the magnet technology for energy frontier accelerators, such as Tevatron, RHIC and LHC. The NbTi based magnets offered advantage of much higher fields B and much lower electric wall plug power consumption if operated at 4.5 K but relatively small ramping rates dB/dt << 0.1 T/s. The need for the accelerators of high average beam power and high repetition rates have initiated studies of fast ramping SC magnets, but it was found the AC losses in the low-temperature superconductors preclude obtaining the rates in the excess of (1-4) T/s. Here we report the first application of high-temperature superconductor magnet technology with substantially lower AC losses and report record high ramping rates of 12 T/s achieved in a prototype dual-aperture accelerator magnet.Particle accelerators critically depend on development of high-field superconducting (SC) magnets 1,2,3 which allow to extend the energy reach and achieve desired cost and electric power efficiency of major physics facilities such as Tevatron at Fermilab 4 -the pioneering machne in operation from 1987 to 2011, Relativistic Heavy Ion Collider 5 (RHIC, 1999 -now) at Brookhaven National Laboratory, and Large Hadron Collider 6 (LHC) at CERN, Switzerland which operates since 2008. Note, that all these accelerators mostly operate in the regime of very slow beam energy ramp and their magnetic field ramping rates dB/dt are very low, 0.03 -0.07 T/s. Next generation facilities such as muon colliders 7,8 , future circular colliders 9 and high-intensity proton synchrotrons for neutrino research 10,11,12,13 accelerators demand substantially faster cycles of beam acceleration that in turn require fast cycling accelerator magnets with dB/dt of the order of tens to hundreds of T/s. Normal conducting magnets can provide such rates -for example the JPARC 3GeV proton rapid cycling synchrotron (RCS) magnets operate with dB/dt rates of 70 T/s 14 -but 1

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A Test of a 2 Tesla Superconducting Transmission Line Magnet System

Cited by 16 publications

References 7 publications

Field Quality Measurements of a 2-Tesla Transmission Line Magnet

Field Quality Measurements of a 2-Tesla Transmission Line Magnet

A Short Model Excitation of an Asymmetric Force Free SuperconductingTransmission Line Magnet

Record Fast-Cycling Accelerator Magnet Based on High-Temperature Superconductor [Poster]

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