Experience Gained From the Construction, Test and Operation of the Large 4-T CMS Coil

Hervé, A.; Campi, D.; Curé, B.; Fabbricatore, P.; Gaddi, A.; Kircher, F.; Sgobba, S.

doi:10.1109/tasc.2008.920526

Cited by 10 publications

(8 citation statements)

References 21 publications

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“…The parameters of the ILD magnet being very similar to the CMS ones (c.f. [132], [133]), basic designs of both magnets are similar. An anti DiD (Dipole in Detector) is also added in the design, which allows to compensate the effect of the crossing angle for the outgoing beam (and pairs) behind the I.P.…”

Section: Coil and Return Yokementioning

confidence: 99%

The International Large Detector: Letter of Intent

Abe¹,

Schuwalow²,

Yamauchi³

et al. 2010

106

128

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Section: Coil and Return Yokementioning

confidence: 99%

The International Large Detector: Letter of Intent

Abe¹,

Schuwalow²,

Yamauchi³

et al. 2010

106

128

View full text Add to dashboard Cite

“…3. The Rutherford type NbTi/Cu cable, composed of 40 strands of 1.3 mm diameter and a Cu/NbTi ratio of 1.1, is co-extruded with a reinforced high RRR aluminum stabilizer, following the techniques used in the ATLAS and CMS detector magnets at CERN [7]- [9]. The critical current of the conductor is I c (5 T, 4.5 K) = 58 kA.…”

Section: B Conductormentioning

confidence: 99%

The Superconducting Toroid for the New International AXion Observatory (IAXO)

Shilon

Dudarev

Silva

et al. 2014

IEEE Trans. Appl. Supercond.

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Abstract-IAXO, the new International AXion Observatory, will feature the most ambitious detector for solar axions to date. Axions are hypothetical particles which were postulated to solve one of the puzzles arising in the standard model of particle physics, namely the strong CP (Charge conjugation and Parity) problem. This detector aims at achieving a sensitivity to the coupling between axions and photons of one order of magnitude beyond the limits of the current detector, the CERN Axion Solar Telescope (CAST). IAXO is equivalent to combining roughly 20000 CAST detectors into a single apparatus. The IAXO detector relies on a high-magnetic field distributed over a very large volume to convert solar axions to detectable X-ray photons. Inspired by the ATLAS barrel and end-cap toroids, a large superconducting toroid is being designed. The toroid comprises eight, one meter wide and twenty one meters long racetrack coils. The assembled toroid is sized 5.2 m in diameter and 25 m in length and its mass is about 250 tons. The useful field in the bores is 2.5 T while the peak magnetic field in the windings is 5.4 T. At the operational current of 12 kA the stored energy is 500 MJ. The racetrack type of coils are wound with a reinforced Aluminum stabilized NbTi/Cu cable and are conduction cooled. The coils optimization is shortly described as well as new concepts for cryostat, cold mass, supporting structure and the sun tracking system. Materials selection and sizing, conductor, thermal loads, the cryogenics system and the electrical system are described. Lastly, quench simulations are reported to demonstrate the system's safe quench protection scheme.

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“…3. The large Rutherford type NbTi cable, comprising 40 strands of 1.3 mm diameter and a Cu/NbTi ratio of 1.1, is co-extruded within a high-purity and high RRR aluminum stabilizer, following the techniques used in the ATLAS and CMS detector magnets at CERN [7]- [9]. The use of a Rutherford cable as the superconducting element provides a high current density while maintaining high performance redundancy in the large number of strands.…”

Section: B Conductormentioning

confidence: 99%

New superconducting toroidal magnet system for IAXO, the international AXion observatory

Shilon¹,

Dudarev²,

Silva³

et al. 2014

AIP Conference Proceedings

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Abstract. Axions are hypothetical particles that were postulated to solve one of the puzzles arising in the standard model of particle physics, namely the strong CP (Charge conjugation and Parity) problem. The new International AXion Observatory (IAXO) will incorporate the most promising solar axions detector to date, which is designed to enhance the sensitivity to the axion-photon coupling by one order of magnitude beyond the limits of the current state-of-the-art detector, the CERN Axion Solar Telescope (CAST). The IAXO detector relies on a high-magnetic field distributed over a very large volume to convert solar axions into X-ray photons. Inspired by the successful realization of the ATLAS barrel and end-cap toroids, a very large superconducting toroid is currently designed at CERN to provide the required magnetic field. This toroid will comprise eight, one meter wide and twenty one meter long, racetrack coils. The system is sized 5.2 m in diameter and 25 m in length. Its peak magnetic field is 5.4 T with a stored energy of 500 MJ. The magnetic field optimization process to arrive at maximum detector yield is described. In addition, materials selection and their structure and sizing has been determined by force and stress calculations. Thermal loads are estimated to size the necessary cryogenic power and the concept of a forced flow supercritical helium based cryogenic system is given. A quench simulation confirmed the quench protection scheme.

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Experience Gained From the Construction, Test and Operation of the Large 4-T CMS Coil

Cited by 10 publications

References 21 publications

The International Large Detector: Letter of Intent

The International Large Detector: Letter of Intent

The Superconducting Toroid for the New International AXion Observatory (IAXO)

New superconducting toroidal magnet system for IAXO, the international AXion observatory

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