The Brookhaven muon storage ring magnet

Danby, G. T.; Addessi, L.; Armoza, Z.; Benante, J.; Brown, H.; Bunce, G.; Cottingham, J.; Cullen, J. R.; Geller, J.; Hseuh, H. C.; Jackson, J.; Jia, L. X.; Kochis, S.; Koniczny, D.; Larsen, R.; Lee, Y. Y.; Mapes, M.; Meier, R.; Meng, W.; Morse, W. M.; O'Toole, M.; Pai, C.; Polk, I.; Prigl, R.; Semertzidis, Y. K.; Shutt, R.; Snydstrup, L.; Soukas, A.; Tallerico, T.; Toldo, F.; Lintig, D. von; Woodle, K.; Carey, Robert M.; Earle, W.; Hazen, E.; Krienen, F.; Miller, J.; Ouyang, Jinsong; Roberts, B. L.; Sulak, L.; Worstell, W.; Orlov, Y.; Winn, D.; Großmann, A.; Jungmann, Klaus-Peter; Putlitz, G. zu; Walter, P. von; Debevec, P. T.; Deninger, W.; Hertzog, D. W.; Sedykh, S.; Urner, D.; Green, M. A.; Haeberlen, Ulrich; Cushman, P.; Girón, S.; Kindem, J.; Miller, D. H.; Timmermans, C.; Zimmerman, D.; Дружинин, В. П.; Fedotovich, G. V.; Григорьев, Д. Н.; Khazin, B. I.; Ryskulov, N.M.; Serednyakov, S. S.; Shatunov, Yu. M.; Solodov, E. P.; Endo, K.; Hirabayashi, H.; Mizumachi, Y.; Yamamoto, A.; Dhawan, S.; Disco, A.; Farley, F. J. M.; Fei, X.; Grosse‐Perdekamp, M.; Hughes, V. W.; Kawall, D.; Redin, S. I.

doi:10.1016/s0168-9002(00)00704-x

Cited by 67 publications

(42 citation statements)

References 8 publications

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“…The BNL E821 storage ring [18] will be reused at Fermilab. Following a highly publicized move mostly on water from New York to Illinois of the superconducting coils, and a less-publicized move of hundreds of tons of steel yoke and other components by truck, the storage ring has now been fully re-assembled.…”

Section: Storage Ringmentioning

confidence: 99%

Next Generation Muong− 2 Experiments

Hertzog

2016

EPJ Web of Conferences

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Abstract. I report on the progress of two new muon anomalous magnetic moment experiments, which are in advanced design and construction phases. The goal of Fermilab E989 is to reduce the experimental uncertainty of a μ from Brookhaven E821 by a factor of 4; that is, δa μ ∼ 16 × 10 −11 , a relative uncertainty of 140 ppb. The method follows the same magic-momentum storage ring concept used at BNL, and pioneered previously at CERN, but muon beam preparation, storage ring internal hardware, field measuring equipment, and detector and electronics systems are all new or upgraded significantly. In contrast, J-PARC E34 will employ a novel approach based on injection of an ultra-cold, low-energy, muon beam injected into a small, but highly uniform magnet. Only a small magnetic focusing field is needed to maintain storage, which distinguishes it from CERN, BNL and Fermilab. E34 aims to roughly match the previous BNL precision in their Phase 1 installation.

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Section: Storage Ringmentioning

confidence: 99%

Next Generation Muong− 2 Experiments

Hertzog

2016

EPJ Web of Conferences

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“…The method used in the third CERN experiment and the BNL experiment are very similar, save the use of direct muon injection [43] into the storage ring, [44,45] which was developed by the E821 collaboration. These experiments are based on the fact that for a µ > 0 the spin precesses faster than the momentum vector when a muon travels transversely to a magnetic field.…”

Section: Measurement Of the Muon Anomalymentioning

confidence: 99%

Future Muon Dipole Moment Measurements

Roberts

2005

Nuclear Physics B - Proceedings Supplements

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From the famous experiments of Stern and Gerlach to the present, measurements of magnetic dipole moments, and searches for electric dipole moments of "elementary" particles have played a major role in our understanding of sub-atomic physics. In this talk I discuss the progress on measurements and theory of the magnetic dipole moment of the muon. I also discuss a new proposal to search for a permanent electric dipole moment (EDM) of the muon and put it into the more general context of other EDM searches. These experiments, along with searches for the lepton flavor violating decays µ → eγ and µ − + A → e − + A, provide a path to the high-energy frontier through precision measurements.

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“…Superconducting coils, although much more expensive than copper coils, have several advantages which make a high-precision measurement of the magnetic field much more feasible: relative low power requirements, low ripple currents, thermal stability (once cold) and thermal independence of the coils and iron yoke. Four NbTi/Cu superconducting coils, each made of 24 turns, power the magnet: two at an outer radius drive the field across the storage ring gap, and two at inner radius above and below the mid-plane cancel the flux in the ring center and improve the field quality in the gap [49]. The coils are connected in series and operate at a current of 5200 A at a temperature of 4.5 K; the current in the outer and inner coils flows in opposite directions.…”

Section: The Muon G-2 Storage Ringmentioning

confidence: 99%

“…The surface coils, mounted on printed circuit boards, are constructed of 2×120 wires, each separated by 2.5 mm, running azimuthally around the ring [49]. The coils are used to correct the lowest multipoles to tens of ppm.…”

Section: Shimming Of the Magnetmentioning

confidence: 99%

A Measurement of the Bs Lifetime at CDF Run II

Farrington¹

2004

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The Brookhaven muon storage ring magnet

Cited by 67 publications

References 8 publications

Next Generation Muong− 2 Experiments

Next Generation Muong− 2 Experiments

Future Muon Dipole Moment Measurements

A Measurement of the Bs Lifetime at CDF Run II

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