Combined element magnet production for the Relativistic Heavy Ion Collider (RHIC) at BNL

Mulhall, S.; Foelsche, H.; Ganetis, G.; Greene, A.; Kelly, E.; Plate, S.; Willen, E.

doi:10.1109/pac.1995.505242

Cited by 4 publications

(1 citation statement)

References 2 publications

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“…ILL Control of the Dipole Center Positions During Production RHIC dipoles are produced by the Northrop-Grumman Corporation in Bethpage, New York. Properties of the REUC dipoles as well as other details of the dipole p r e duction are presented in other papers at this conference [3][4] [5]. The dipole aperture center is located by a combination of the optical survey of the four fiducials with the mechanical survey during production.…”

Section: The Global and Local Monument Network In The Rhic Tunnelmentioning

confidence: 99%

Alignment and survey of the elements in RHIC

Trbojević

Cameron

Ganetis

et al.

Proceedings Particle Accelerator Conference

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The Relativistic Heavy Ion Collider (RHIC) consists of two rings with cryogenic magnets at a 4.5K operating temperature. Control of positions of the dipole and quadrupole cold masses (iron laminations) and the beam position monitors (BPM's) during production and installation is presented. The roll of the dipoles is controlled by a combination of rotating coil measurements with the surveying measurements. The center of the quadrupole magnetic field is obtained by direct measurement of the field shape within a colloidal cell placed inside the quadrupoles. Special attention is given to the triplet quadrupole alignment and determination of the field center position.

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Section: The Global and Local Monument Network In The Rhic Tunnelmentioning

confidence: 99%

Alignment and survey of the elements in RHIC

Trbojević

Cameron

Ganetis

et al.

Proceedings Particle Accelerator Conference

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The magnet system of the Relativistic Heavy Ion Collider (RHIC)

et al. 1996

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Construction and testing of arc dipoles and quadrupoles for the Relativistic Heavy Ion Collider (RHIC) at BNL

Wanderer¹,

Muratore²,

Anerella³

et al.

Proceedings Particle Accelerator Conference

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I. ARC DIPOLES A. Design and ConshuciionThe arc dipole cold mass, shown in Figure 1, has a measured central field of 3.40 T at 5.0 kA operating current, an effective length of 9.44 m, and an 80 mm bore. The %Ti filaments have a diameter of 6 jim, with a minimum critical current density of 2600 Nmm' at 5 T, 4.2 K. The cable is made up of 30 wires with diameter 0.648 mm 143. The 32-turn single-layer coil uses three wedges to achieve good field quality.The Also novel is the use of the iron yoke as a collar for the coil, providing both prestress and flux return. The yoke laminations are 6.35 mm thick (to allow their use as collars), with dimensional precision of 25 pm maintained by the use of fine blanking The cold mass sagitta is large, 46 mm. A more detailed description ofthe magnet is given elsewhere 191.The dipoles are being manufactured by the Northrop Grumman Corporation (NGC) ready for tunnel installation, under a build-bpht contract. A total of 373 80 mm dipoles have been ordered: 298 9.44 m dipoles (icludmg 10 spares) and 75 shorter dipoles with the same cross section for use in the insertion regions. The delivery rate is now one per day, with the entire order scheduled for completion in June 1996. A more detailed accouIlt of the manufacturing process is in preparation [IO]. B. Test Procedures andResultsTests performed on all dipoles at room temperature include hipot, optical survey, and field quality. The harmonics and field angle are measured at the vendor's site w i t h a system containing a 1 m-long mta,$ng-coil and gravity sensors ("mole") supplied by BNL [ll]. The integral field is measured with a stationary coil, by ramping the magnet. Field quality measurements i m made at currents up to 30A.

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Combined element magnet production for the Relativistic Heavy Ion Collider (RHIC) at BNL

Cited by 4 publications

References 2 publications

Alignment and survey of the elements in RHIC

Alignment and survey of the elements in RHIC

The magnet system of the Relativistic Heavy Ion Collider (RHIC)

Construction and testing of arc dipoles and quadrupoles for the Relativistic Heavy Ion Collider (RHIC) at BNL

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