Development of a high gradient quadrupole for the LHC interaction regions

Bossert, R.; Fehér, S.; Gourlay, S.A.; Heger, T.; Huang, Y.; Kerby, J.; Lamm, M.J.; Limon, P.; Mazur, Péter; Nobrega, F.; Ozelis, J.; Sabbi, G.; Strait, J.; Zlobin, A.V.; Caspi, S.; Dell'Orco, D.; McInturff, A.D.; Scanlan, R.M.; Oort, J.M. van; Gupta, R.

doi:10.1109/77.614612

Cited by 31 publications

(12 citation statements)

References 7 publications

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“…For the Q1 and Q3 components, KEK [1] have made a 4-layer magnet using 11 mm wide cable. For the Q2a and Q2b components, Fermilab [2] as part of the US-LHC Accelerator Project is producing magnets based on a 2-layer design using 15.4 mm wide cable, that is the focus of this paper. A constraint imposed in the initial design was that both inner layer and outer layer cable were required to be the same width, so that a joint between inner and outer layer cables could be made within the straignt section of the outer coil body, several turns from the pole.…”

Section: T He Inner Triplet Quadrupoles For the Lhc Interactionmentioning

confidence: 99%

Manufacturing experience for the LHC inner triplet quadrupole cables

Scanlan

Higley

Bossert

et al. 2002

IEEE Trans. Appl. Supercond.

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Abstract--The design for the U.S. LHC Inner TripletQuadrupole magnet requires a 37 strand (inner layer) and a 46 strand (outer layer) cable. This represents the largest number of strands attempted to date for a production quantity of Rutherford-type cable. The cable parameters were optimized during the production of a series of short prototype magnets produced at FNAL. These optimization studies focused on critical current degradation, dimensional control, coil winding, and interstrand resistance. After the R&D phase was complete, the technology was transferred to NEEW and a new cabling machine was installed to produce these cables. At present, about 60 unit lengths, out of 90 required for the entire production series of magnets, have been completed for each type of cable. The manufacturing experience with these challenging cables will be reported. Finally, the implications for even larger cables, with more strands, will be discussed.

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Section: T He Inner Triplet Quadrupoles For the Lhc Interactionmentioning

confidence: 99%

Manufacturing experience for the LHC inner triplet quadrupole cables

Scanlan

Higley

Bossert

et al. 2002

IEEE Trans. Appl. Supercond.

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“…These models employ a conventional collaring system similar to that used in many previous NbTi designs and based particularly on the LHC IR quadrupoles [6]. The collar has been a reliable system, providing the required coil support as well as field quality.…”

Section: Introductionmentioning

confidence: 99%

DEVELOPMENT AND TEST OF COLLARING METHODS FOR Nb[sub 3]SN QUADRUPOLE MAGNETS

Bossert¹,

Ambrosio²,

Andreev³

et al. 2010

AIP Conference Proceedings

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Fermilab is developing Nb 3 Sn quadrupole magnets for the planned upgrade of interaction regions of the Large Hadron Collider (LHC). Two distinctly different approaches have been employed, one using quadrupole-symmetric and one using dipolesymmetric collar laminations. This paper describes the design features of both collar types, collaring techniques for brittle Nb 3 Sn coils, and compares the advantages and disadvantages of the two approaches. Results of mechanical analysis for quadrupoles based on dipole-type and quadrupole-type collars are presented. Magnet construction issues and test results are reported. Test results include coil and component strain measurements during construction. Plans for the completion and test of the first dipolesymmetric assembly are described.

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“…A thick-wall stainless steel beam tube also serves as an internal beam absorber. Withrespect to the last status report [2], the coil prestress is now entirely provided by the collars. For this purpose the collar material has been changed from aluminum to stainless steel, and the collar width at the midplane has been increased from 20 to 25 mm.…”

Section: Magnet Designmentioning

confidence: 99%

“…At the same time, due to large and rapidly varying values of the ,&function, a high field quality is required. To meet these severe constraints, a design based on a two-layer coil geometry has been proposed [2]. The magnet uses SSCtype NbTi superconducting strands and operates in superfluid helium.…”

Section: Introductionmentioning

confidence: 99%

Magnetic design of a high gradient quadrupole for the LHC low-β insertions

Sabbi

Gourlay²,

Kerby³

et al.

Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)

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Fermilab, Lawrence Berkeley National Laboratory and Brookhaven National Laboratory have formed a consortium to provide components for the Large Hadron Collider (LHC) to be built at CERN. The U.S. contribution includes half of the high gradient quadrupoles (HGQ) for the inner focusing triplets. In this paper a description of the HGQ magnetic design is given, including short sample limit for field gradient, sources and expected values of systematic and random field errors, and possible strategies for field quality correction.

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Development of a high gradient quadrupole for the LHC interaction regions

Cited by 31 publications

References 7 publications

Manufacturing experience for the LHC inner triplet quadrupole cables

Manufacturing experience for the LHC inner triplet quadrupole cables

DEVELOPMENT AND TEST OF COLLARING METHODS FOR Nb[sub 3]SN QUADRUPOLE MAGNETS

Magnetic design of a high gradient quadrupole for the LHC low-β insertions

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