The CLAS12 Torus Detector Magnet at Jefferson Laboratory

Luongo, C.A.; Ballard, Joshua; Biallas, G.; Elouadrhiri, L.; Fair, Ruben; Ghoshal, Probir K.; Kashy, Dave; Legg, R.; Pastor, O.; Rajput-Ghoshal, Renuka; Rode, C.; Wiseman, M.; Young, G. R.; Elementi, L.; Krave, Steven; Makarov, A.; Nobrega, F.; Velev, G.

doi:10.1109/tasc.2015.2510336

Cited by 8 publications

(10 citation statements)

References 9 publications

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“…The torus magnet and the Torus Service Tower (TST) were designed and built at JLab; the Cryogenic Distribution Box (DBX), was designed at JLab and fabricated by Meyer Tool, while the coils were fabricated at the Fermi National Accelerator Laboratory (FNAL), USA [4,5]. The solenoid magnet was designed and fabricated by Everson Tesla Inc., USA (ETI), while the Solenoid Service Tower (SST) and cryogenics were designed and fabricated by JLab.…”

Section: Physics Requirements and Technical Specificationsmentioning

confidence: 99%

The CLAS12 superconducting magnets

Fair¹,

Baltzell²,

Bachimanchi³

et al. 2020

Nuclear Instruments and Methods in Physics Research Section A:

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Section: Physics Requirements and Technical Specificationsmentioning

confidence: 99%

The CLAS12 superconducting magnets

Fair¹,

Baltzell²,

Bachimanchi³

et al. 2020

Nuclear Instruments and Methods in Physics Research Section A:

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“…The magnet consists of 6 torus coils arranged in a single electrical circuit, and utilizes a single supercritical helium cooling circuit [4], [5]. Each of the magnet coil cold masses is housed in a vacuum vessel shell and supported at a central cold hub, as well as by cold columns at the outside perimeter creating a hexagonal torus as seen in Fig.…”

Section: Magnet and Coil Designmentioning

confidence: 99%

“…Cooling to the torus coils is provided by conduction cooling from a supercritical helium cooling tube around the inside perimeter of the coil [3], [5]. Two layers of OFE Copper sheet form the heat shield and distribute cooling to the coil through a solder connection located at the cooling tube.…”

Section: Heat Shield Solderingmentioning

confidence: 99%

Overview of Torus Magnet Coil Production at Fermilab for the Jefferson Lab 12-GeV Hall B Upgrade

Krave

Velev

Makarov

et al. 2016

IEEE Trans. Appl. Supercond.

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Fermi National Accelerator Laboratory (Fermilab) fabricated the torus magnet coils for the 12 GeV Hall B upgrade at Jefferson Laboratory (JLab). The production consisted of 6 large superconducting coils for the magnet and 2 spare coils. The toroidal field coils are approximately 2 m x 4 m x 5 cm thick. Each of these coils consists of two layers, each of which has 117 turns of copper-stabilized superconducting cable which will be conduction cooled by supercritical helium. Due to the size of the coils and their unique geometry, Fermilab designed and fabricated specialized tooling and, together with JLab, developed unique manufacturing techniques for each stage of the coil construction. This paper describes the tooling and manufacturing techniques required to produce the six production coils and two spare coils needed by the project.

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“…II. The CLAS12 magnets, a torus and an actively-shielded solenoid are located in Jefferson Lab's Experimental Hall B and have several similar or identical features [1]- [2]. The magnets are located in close proximity to one another (Fig.…”

Section: Introductionmentioning

confidence: 99%

Interactions Observed Between Torus and Solenoid Superconducting Magnets at JLab

Kashy

Fair

Ghoshal

et al. 2020

IEEE Trans. Appl. Supercond.

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The Jefferson Lab 12 GeV Upgrade of Experimental End Station Hall B required a new detector system that would be more sensitive to forward going particles and able to handle higher luminosity. This new detector is CLAS12 and includes two superconducting iron-free magnets -a torus and an actively-shielded solenoid. The torus magnet consists of 6trapezoidal racetrack-type coils while the solenoid is an actively shielded 5 T magnet. The torus and the solenoid are located in close proximity to one another and are surrounded by sensitive particle detectors. The torus and solenoid, operating at 3770 A and 2416 A respectively, were commissioned successfully and are operating normally. This paper presents observed electromagnetic interactions which include induced static mechanical loads and inductive coupling as well as a summary of some of the cryogenic interactions and how they are mitigated.

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The CLAS12 Torus Detector Magnet at Jefferson Laboratory

Cited by 8 publications

References 9 publications

The CLAS12 superconducting magnets

The CLAS12 superconducting magnets

Overview of Torus Magnet Coil Production at Fermilab for the Jefferson Lab 12-GeV Hall B Upgrade

Interactions Observed Between Torus and Solenoid Superconducting Magnets at JLab

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