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Design and testing of the 1.5 T superconducting solenoid for the BaBar detector at PEP-II in SLAC

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16 Author(s)
T. G. O'Connor ; Lawrence Livermore Nat. Lab., CA, USA ; S. Shen ; P. Fabbricatore ; S. Farinon
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The 1.5 T superconducting solenoid is part of the BaBar detector located in the PEP-II B-Factory machine at the Stanford Linear Accelerator Center. The solenoid has a 2.8 m bore and is 3.7 m long. The two layer solenoid is wound with an aluminum stabilized conductor which is graded axially to produce a +/3% field uniformity in the tracking region. The 24 month fabrication, 3 month installation and 1 month commissioning of the solenoid were completed on time and budget. This paper summarizes the culmination of a 3 year design, fabrication and testing program of the BaBar superconducting solenoid. Critical current measurements of the superconducting strand, cable and conductor, cool-down, operation with the thermosyphon cooling, fast and slow discharges, and magnetic forces are discussed in detail.

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IEEE Transactions on Applied Superconductivity  (Volume:9 ,  Issue: 2 )