-
G. Ambrosio,
N. Andreev,
M. Anerella,
E. Barzi,
B. Bingham,
D. Bocian,
R. Bossert,
S. Caspi,
G. Chlachidize,
D. Dietderich, [......],
S. Prestemon,
G.L. Sabbi,
J. Schmalzle,
C. Sylvester,
M. Tartaglia,
D. Turrioni,
G. Velev,
P. Wanderer, G. Whitson,
A.V. Zlobin
[show abstract]
[hide abstract]
ABSTRACT: In December 2009 during its first cold test, LQS01, the first Long Nb<sub>3</sub>Sn Quadrupole made by LARP (LHC Accelerator Research Program, a collaboration of BNL, FNAL, LBNL and SLAC), reached its target field gradient of 200 T/m. This target was set in 2005 by the US Department of Energy, CERN and LARP, as a significant milestone toward the development of Nb<sub>3</sub>Sn quadrupoles for possible use in LHC luminosity upgrades. LQS01 is a 90 mm aperture, 3.7 m long quadrupole using Nb<sub>3</sub>Sn coils. The coil layout is equal to the layout used in the LARP Technological Quadrupoles (TQC and TQS models). Pre-stress and support are provided by a segmented aluminum shell pre-loaded using bladders and keys, similarly to the TQS models. After the first test the magnet was disassembled, reassembled with an optimized pre-stress, and reached 222 T/m at 4.5 K. In this paper we present the results of both tests and the next steps of the Long Quadrupole R&D.
IEEE Transactions on Appiled Superconductivity 07/2011; · 1.04 Impact Factor
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G. Ambrosio,
N. Andreev,
M. Anerella,
E. Barzi,
B. Bingham,
D. Bocian,
B. Bordini,
R. Bossert,
L. Bottura,
S. Caspi, [......],
G.L. Sabbi,
J. Schmalzle,
C. Sylvester,
M. Tartaglia,
D. Turrioni,
G. Velev,
P. Wanderer, G. Whitson,
G. Willering,
A.V. Zlobin
[show abstract]
[hide abstract]
ABSTRACT: The test of the first LARP (LHC Accelerator Research Program) Long Quadrupole is a significant milestone toward the development of Nb<sub>3</sub>Sn quadrupoles for LHC (Large Hadron Collider) Luminosity Upgrades. These 3.7-m long magnets, scaled from the 1-m long Technological Quadrupoles, are used to develop our capabilities to fabricate and assemble Nb<sub>3</sub>Sn coils and structures with lengths comparable to accelerator magnet dimensions. The long quadruples have a target gradient of 200 T/m in a 90-mm aperture. Pre-stress and support are provided by an Al-shell-based structure pre-loaded using bladders and keys. The coils were fabricated at BNL and FNAL, the shell-based structure was designed and assembled at LBNL, the test is performed at FNAL. In this paper we present the final steps of the development of the first model (LQS01), several upgrades to the test facility, the test results of witness cables, and the short sample limit.
IEEE Transactions on Appiled Superconductivity 07/2010; · 1.04 Impact Factor
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G. Ambrosio,
N. Andreev,
M. Anerella,
E. Barzi,
R. Bossert,
S. Caspi,
G. Chlachidize,
D.R. Dietderich,
H. Felice,
P. Ferracin, [......],
F. Nobrega,
I. Novitsky,
S. Peggs,
S. Prestemon,
G.-L. Sabbi,
J. Schmalzle,
D. Turrioni,
P. Wanderer, G. Whitson,
A.V. Zlobin
[show abstract]
[hide abstract]
ABSTRACT: The U.S. LHC Accelerator Research Program (LARP) has started the fabrication of 3.7-m long Nb<sub>3</sub>Sn quadrupole models. The Long Quadrupoles (LQ) are ldquoProof-of-Principlerdquo magnets which are to demonstrate that Nb<sub>3</sub>Sn technology is mature for use in high energy particle accelerators. Their design is based on the LARP Technological Quadrupole (TQ) models, developed at FNAL and LBNL, which have design gradients higher than 200 T/m and an aperture of 90 mm. The plans for the LQ R&D and a design update are presented and discussed in this paper. The challenges of fabricating long accelerator-quality Nb<sub>3</sub>Sn coils are presented together with the solutions adopted for the LQ coils (based on the TQ experience). During the fabrication and inspection of practice coils some problems were found and corrected. The fabrication at BNL and FNAL of the set of coils for the first Long Quadrupole is in progress.
IEEE Transactions on Appiled Superconductivity 07/2009; · 1.04 Impact Factor
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G. Ambrosio,
N. Andreev,
M. Anerella,
E. Barzi,
R. Bossert,
S. Caspi,
G. Chlachidize,
D. Dietderich,
S. Feher,
H. Felice, [......],
J. Muratore,
F. Nobrega,
I. Novitsky,
G.L. Sabbi,
J. Schmalzle,
M. Tartaglia,
D. Turrioni,
P. Wanderer, G. Whitson,
A.V. Zlobin
[show abstract]
[hide abstract]
ABSTRACT: A major milestone for the LHC Accelerator Research Program (LARP) is the test, by the end of 2009, of two 4 m-long quadrupole magnets (LQ) wound with Nb<sub>3</sub>Sn conductor. The goal of these magnets is to be a proof of principle that Nb<sub>3</sub>Sn is a viable technology for a possible LHC luminosity upgrade. The design of the LQ is based on the design of the LARP Technological Quadrupoles, presently under development at FNAL and LBNL, with 90-mm aperture and gradient higher than 200 T/m. The design of the first LQ model will be completed by the end of 2007 with the selection of a mechanical design. In this paper we present the coil design addressing some fabrication technology issues, the quench protection study, and three designs of the support structure.
IEEE Transactions on Appiled Superconductivity 07/2008; · 1.04 Impact Factor
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[show abstract]
[hide abstract]
ABSTRACT: Tests were performed to assess the viability of several cable insulation systems for use in Nb3Sn accelerator magnets. Insulated stacks of cables were subjected to reaction cycles commonly used for Nb3Sn coils. After reaction and epoxy impregnation, current leakage between turns was measured at pressures up to 180 MPa and turn‐to‐turn potentials up to 500 V. Systems consisting of S‐2 glass, ceramic fiber, and E‐glass were tested. Several methods of applying the insulation were incorporated, including sleeves and various spiral wrapped configurations. Methods of sample preparation and testing are described and results are reported.
AIP Conference Proceedings. 03/2008; 986(1):161-168.
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S. Feher,
R.C. Bossert,
G. Ambrosio,
N. Andreev,
E. Barzi,
R. Carcagno,
V. S.S. Kashikhin,
V. V.V. Kashikhin,
M.J. Lamm,
F. Nobrega, [......],
D. Turrioni, G. Whitson,
R. Yamada,
A.V. Zlobin,
S. Caspi,
D. Dietderich,
P. Ferracin,
R. Hannaford,
A.R. Hafalia,
G. Sabbi
[show abstract]
[hide abstract]
ABSTRACT: In support of the development of a large-aperture superconducting quadrupole for the Large Hadron Collider (LHC) luminosity upgrade, two-layer quadrupole models (TQC and TQS) with 90 mm aperture are being constructed at Fermilab and LBNL within the framework of the US LHC Accelerator Research Program (LARP). This paper describes the construction and test of model TQC01. ANSYS calculations of the structure are compared with measurements during construction. Fabrication experience is described and in-process measurements are reported. Test results at 4.5 K are presented, including magnet training, current ramp rate studies and magnet quench current. Results of magnetic measurements at helium temperature are also presented.
IEEE Transactions on Appiled Superconductivity 07/2007; · 1.04 Impact Factor
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S. Caspi,
D. Dietderich,
P. Ferracin,
S.A. Gourlay,
A.R. Hafalia,
R. Hannaford,
A.F. Lietzke,
A.D. McInturff,
G.L. Sabbi,
A. Ghosh,
A.N. Andreev,
E. Barzi,
R. Bossert,
V.V. Kashikhin,
I. Novitski, G. Whitson,
A.V. Zlobin
[show abstract]
[hide abstract]
ABSTRACT: In support of the development of a large-aperture Nb<sub>3</sub>Sn superconducting quadrupole for the Large Hadron Collider luminosity upgrade, two models (TQS and TQC) with a 90-mm aperture are being constructed at LBNL and FNAL within the framework of the US LHC Accelerator Research Program (LARP). These models use two identical Nb<sub>3</sub>Sn coils but have different coil support structures. This paper describes the fabrication, assembly, cool-down and test of TQS01-a model based on key and bladder technology with supporting iron yoke and an aluminum shell. Comparison of the test measurements with design expectations is also reported.
IEEE Transactions on Appiled Superconductivity 07/2007; · 1.04 Impact Factor
-
R.C. Bossert,
G. Ambrosio,
N. Andreev,
E. Barzi,
S. Caspi,
D.R. Dietderich,
P. Ferracin,
A. Ghosh,
S.A. Gourlay,
A.R. Hafalia, [......],
V.V. Kashikhin,
A.F. Lietzke,
S. Mattafirri,
A.D. McInturff,
I. Novitski,
G.L. Sabbi,
D. Turrioni, G. Whitson,
R. Yamada,
A.V. Zlobin
[show abstract]
[hide abstract]
ABSTRACT: As a first step toward the development of a large-aperture Nb<sub>3</sub>Sn superconducting quadrupole for the Large Hadron Collider (LHC) luminosity upgrade, two-layer technological quadrupole models (TQS01 at LBNL and TQC01 at Fermilab) are being constructed within the framework of the US LHC Accelerator Research Program (LARP). Both models use the same coil design, but have different coil support structures. This paper describes the TQC01 design, fabrication technology and summarizes its main parameters
IEEE Transactions on Appiled Superconductivity 07/2006; · 1.04 Impact Factor
-
R C Bossert,
G Ambrosio,
N Andreev,
E Barzi,
S Caspi,
D R Dietderich,
P Ferracin,
A Ghosh,
S A Gourlay,
A R Hafalia, [......],
V V Kashikhin,
A F Lietzke,
S Mattafirri,
A D Mcinturff,
I Novitski,
G L Sabbi,
D Turrioni, G Whitson,
R Yamada,
A V Zlobin
[show abstract]
[hide abstract]
ABSTRACT: As a first step toward the development of a large-aper-ture Nb 3 Sn superconducting quadrupole for the Large Hadron Collider (LHC) luminosity upgrade, two-layer technological quadrupole models (TQS01 at LBNL and TQC01 at Fermilab) are being constructed within the framework of the US LHC Accelerator Research Program (LARP). Both models use the same coil design, but have different coil support structures. This paper describes the TQC01 design, fabrication technology and summarizes its main parameters.
