Tevatron HTS Power Lead Test

Fehér, S.; Carcagno, R.; Orris, D.; Pischalnikov, Yuriy; Sylvester, C.; Tartaglia, M.; Tompkins, J.

doi:10.1109/tasc.2005.849138

Cited by 3 publications

(6 citation statements)

References 4 publications

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“…Two power leads recycled from the Tevatron and capable of 10 kA DC current operations will be employed for the PS ([2], [7]). The cooling scheme with LN2 and LHe is presented in Fig.…”

Section: Power Leadsmentioning

confidence: 99%

Preliminary Design of the Production Solenoid Feedbox for the Mu2e Project at Fermilab

Merio

Lamm

Martinez

et al. 2015

IEEE Trans. Appl. Supercond.

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The Mu2e experiment at Fermilab uses three superconducting solenoid magnets cooled to nominally 4.5 K with 80-K thermal shields and heat intercepts; they are in the order: production solenoid (PS), transfer solenoid (TS), and detector solenoid (DS). The cryogenic system is comprised of a refrigerator unit, a distribution box, feed boxes, and transfer lines to the solenoids. A thermosiphon cooling scheme is envisioned for the PS and DS, whereas the TS will use forced flow cooling. This paper focuses on the feedbox for the PS. Helium at 4.8 K and 3 bar is supplied from the distribution box to a subcooler helium vessel contained in the feedbox. Helium (He) is introduced in the magnet thermosiphon cooling circuit and is also used to conductively cool and intercept heat along the transfer lines. A nominally 80-K thermal shield is employed and actively cooled by liquid nitrogen (LN2), which is also used to intercept heat at 80 K in the high-temperature superconductor power leads. A preliminary 3-D CAD model of the feedbox will be introduced, and thermal calculations and optimization of the main elements aimed to reduce the heat loads to the 80-and 4.6-K levels will be thoroughly discussed.

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“…Two power leads recycled from the Tevatron and capable of 10 kA DC current operations will be employed for the PS ([2], [7]). The cooling scheme with LN2 and LHe is presented in Fig.…”

Section: Power Leadsmentioning

confidence: 99%

Preliminary Design of the Production Solenoid Feedbox for the Mu2e Project at Fermilab

Merio

Lamm

Martinez

et al. 2015

IEEE Trans. Appl. Supercond.

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“…The test was performed at Fermilab's Magnet Test Facility in a test dewar that was previously used to test Tevatron HTS Power leads [3] and LHC HTS Power leads [4]. A riser was added to the neck of the test dewar to accommodate the long bus-splice sample (see Fig.1).…”

Section: Test Setupmentioning

confidence: 99%

“…A sufficient number of HTS power leads were left over from the Tevatron era to support the mu2e solenoid power system. These ASC HTS power leads [3] were designed to operate at 6000 A in a liquid Helium bath. In contrast, the Mu2e solenoids will be cooled indirectly using cooling tubes [2] and the maximum operating current is 10150 A.…”

Section: Introductionmentioning

confidence: 99%

Splice, Bus and High Current HTS Lead Tests for the Mu2e Solenoid System

Fehér

Brandt

Kim

et al. 2015

IEEE Trans. Appl. Supercond.

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The Muon-to-Electron conversion experiment (Mu2e), under development at Fermilab, set out to search for new particles (beyond the very successful Standard Model) by detecting electrons originating from neutrino-less conversion of the muon under the nuclear force. The Mu2e magnet system consists of three large superconducting solenoids. Each solenoid has several coils that are wound separately. The coils are made from aluminum NbTi Rutherford cable, electrically connected in series to operate them under a limited number of Power Converters. Usage of HTS power leads and reliable superconducting bus system and splice joints are essential to the assuring safe, continuous and cost effective operation of these magnets. In this paper we summarize the HTS power lead, bus and splice test results.

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“…More detailed tests of a second pair of HTS leads have were carried out in a dewar facility which allowed greater control over cryogenic pressure, temperature, and flow. These tests were very successful [3]. Both the upper conventional copper section which is cooled with liquid nitrogen vapor and the lower HTS section cooled with liquid helium vapor exhibited stable operation up to a 10 kA current and up to 200 A/s current ramp rate.…”

Section: Test Resultsmentioning

confidence: 92%

“…The 10kA current leads for the high gradient quadrupoles in the BTEV IR at Fermilab were to be made from high temperature superconductor (HTS) to avoid additional loading of the 4.5 o K He system. In the present Tevatron configuration, four spool pieces have been modified to incorporate 6 kA HTS leads [1]- [3], and one of these has been installed and operated in the ring for several years. These HTS current leads made by American Superconductor Corporation consist of parallel tapes of BSCCO-2223 multifilamentary powder-in-tube conductor in a silver alloy matrix soldered to a conventional copper upper section.…”

Section: Introductionmentioning

confidence: 99%

HTS Power Leads for the BTEV Interaction Region

Fehér

Carcagno

Orris

et al.

Proceedings of the 2005 Particle Accelerator Conference

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A new Interaction Region (IR) for the BTEV experiment was planned to be built at Fermilab. This IR would have required new superconducting quadrupole magnets and many additional power circuits for their operation. The new "low beta" quadrupole magnet design was based upon the Fermilab LHC quadrupole design, and would have operated at 9.56 kA in 4.5 K liquid helium. The use of conventional power leads for these circuits would have required substantially more helium for cooling than is available from the cryogenic plant, which is already operating close to its limit. To decrease the heat load and helium cooling demands, the use of HTS power leads was necessary. In developing specifications for HTS leads for the BTEV interaction region, several 6 kA HTS leads produced by American Superconductor Corporation (ASC) have been tested at over-current conditions. Final design requirements were to be based on these test results. This paper summarizes the test results and describes the design requirements for the 9.65 kA HTS power leads. ** Surface of the G10 insulating plate between the housing of the spool and the support plate of the lead had a fine epoxy finish to be able to seal the lead with metal C-seals. With time this type of design solution tends to fail and leaks can occur. To obtain a more conservative and reliable solution thin layer of Stainless Steel was added on both sides of the plate. One side of the SS "washer" which is glued with stycast to the G10 plate should have a rough surface and the other side should have the desired fine finish which complies with the standard C-seal requirements.

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Tevatron HTS Power Lead Test

Cited by 3 publications

References 4 publications

Preliminary Design of the Production Solenoid Feedbox for the Mu2e Project at Fermilab

Preliminary Design of the Production Solenoid Feedbox for the Mu2e Project at Fermilab

Splice, Bus and High Current HTS Lead Tests for the Mu2e Solenoid System

HTS Power Leads for the BTEV Interaction Region

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