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by R. Stanek
2005, Applied …
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2000, IEEE Transactions on Applied Superconductivity
2005, IEEE Transactions on Appiled Superconductivity
2008
A series of 1-m long Nb3Sn dipole models has been built at Fermilab in an attempt to refine the wind-and-react technology for Nb3Sn accelerator magnets. Three models made with Powder-in-Tube Nb3Sn strand reached their design field of 10 T demonstrating a good reproducibility of magnet quench performance and field quality. Recently a new dipole ``mirror'' model based on Nb3Sn coil made of improved Restack Rod Process (RRP) strand was constructed and tested reaching the maximum field above 11 T. This paper describes the parameters of the RRP strand and cable used as well as the design, fabrication and test results of this magnet.
2000, IEEE Transactions on Applied Superconductivity
2000, IEEE Transactions on Applied Superconductivity
2002, IEEE Transactions on Appiled Superconductivity
2007, IEEE Transactions on Applied Superconductivity
The high performance NbSn strand produced by Oxford Superconducting Technology (OST) with the Restack Rod Process (RRP) is presently considered as a baseline conductor for the Fermilab's accelerator magnet R∓mp;mp;D program. To improve the strand stability in the current and field range expected in magnet models, the number of subelements in the strand was increased by a factor of two
2006, IEEE Transactions on Applied Superconductivity
2005, IEEE Transactions on Appiled Superconductivity
2000, IEEE Transactions on Applied Superconductivity
2001, PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)
2007, 2007 IEEE Particle Accelerator Conference (PAC)
2006, IEEE Transactions on Applied Superconductivity
2000, IEEE Transactions on Applied Superconductivity
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 Nb3Sn conductor. The goal of these magnets is to be a proof of principle that Nb3Sn is a viable technology for a possible LHC luminosity upgrade. The design of the LQ is based
2004, IEEE Transactions on Appiled Superconductivity
2000, IEEE Transactions on Applied Superconductivity
2000, IEEE Transactions on Applied Superconductivity
2003, IEEE Transactions on Appiled Superconductivity
2005
A series of 1-m long Nb3Sn dipole magnets have been built at Fermilab in an attempt to refine the wind-and-react technology for NbâSn conductor. Models have been made with MJR and PIT strand with varying degrees of success. Subsequently two new dipole ''mirror'' magnets based on RRP NbâSn coils were constructed and tested. This paper describes the design, fabrication and
2000, IEEE Transactions on Applied Superconductivity
2002, IEEE Transactions on Appiled Superconductivity
2000, IEEE Electron Device Letters
2001, PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)
2005
Feasibility study of 15-Tesla dipole magnets wound with a new copper stabilized RHQT NbâAl Rutherford cable is presented. A new practical long copper stabilized RHQT NbâAl strand is presented, which is being developed and manufactured at the National Institute of Material Science (NIMS) in Japan. It has achieved a non-copper J{sub c} of 1000A/mm² at 15 Tesla at 4.2K, with
2004, IEEE Transactions on Appiled Superconductivity
2000, IEEE Transactions on Applied Superconductivity
2002
Three short NbâSn dipole models based on a single-bore cos-theta coil and a cold iron yoke have been fabricated and tested at Fermilab. This paper summarizes the results of magnetic measurements in those models. The geometrical harmonics, coil magnetization effects, cable eddy currents with and without a stainless steel core, and the ''snap-back'' effect at injection are presented.
2001, IEEE Transactions on Appiled Superconductivity
2002
In the recent years, Nb3Sn has been widely used for the development of high field superconducting magnets. It is known that the unreacted Nb-Sn composite undergoes a volume expansion during heat treatment due to the formation of the Nb3Sn phase. In an as-received strand this expansion is isotropic. However, an anisotropic volume expansion was observed in the Rutherford-type cable samples.
2000, IEEE Transactions on Applied Superconductivity
2003, IEEE Transactions on Appiled Superconductivity
2003
2002
Conceptual designs of 90-mm aperture high gradient quadrupoles based on the Nb3Sn superconductor, are being developed at Fermilab for possible 2nd generation IRs with the similar optics as in the current low-beta insertions. Magnet designs and results of magnetic, mechanical, thermal and quench protection analysis for these magnets are presented and discussed.
2005, IEEE Transactions on Appiled Superconductivity
2011
The planned upgrade of the LHC collimation system includes additional collimators to be installed in the dispersion suppressor areas of points 2, 3 and 7. To provide the necessary longitudinal space for the collimators, a replacement of 8.33 T Nb-Ti LHC main dipoles with 11 T dipoles based on NbSn superconductor compatible with the LHC lattice and main systems is
2000, IEEE Transactions on Applied Superconductivity
2008
After a number of years of operation at nominal parameters, the LHC will be upgraded for higher luminosity. This paper discusses the possibility of using a limited number of NbSn quadrupoles for hybrid optics layouts for the LHC Phase I luminosity upgrades with both NbTi and NbSn quadrupoles. Magnet parameters and issues related to using NbSn quadrupoles including aperture, gradient, magnetic length, field quality, operation margin, et cetera are discussed.
2001, IEEE Transactions on Appiled Superconductivity
2011
The LHC collimation upgrade foresees additional collimators installed in dispersion suppressor regions. To obtain the necessary space for the collimators, a solution based on the substitution of LHC main dipoles for stronger dipoles is being considered. CERN and FNAL have started a joint program to demonstrate the feasibility of NbSn technology for this purpose. The goal of the first phase
2003, … ; Volume 49 A
Fermilab is involved in the development of Nb3Sn magnets for future hadron colliders. One of the magnet design options is based on cosine-theta coils and the wind-and-react approach. Three short dipole models of this type were fabricated and tested revealing serious ...
2000, IEEE Transactions on Applied Superconductivity
2003, IEEE Transactions on Appiled Superconductivity
2012, Ieee Transactions on Applied Superconductivity 21 3 1858 1862
2000, IEEE Transactions on Applied Superconductivity
FNAL and CERN are developing a 5.5-m-long twin-aperture Nb3Sn dipole suitable for installation in the LHC. A 2-m-long single-aperture demonstrator dipole with 60 mm bore, a nominal field of 11 T at the LHC nominal current of 11.85 kA and 20% margin has been developed and tested. This paper presents the results of quench protection analysis and protection heater study for the Nb3Sn demonstrator dipole. Extrapolations of the results for long magnet and operation in LHC are also presented.
2012
2003, IEEE Transactions on Appiled Superconductivity
2001, IEEE Transactions on Appiled Superconductivity
2001, IEEE Transactions on Appiled Superconductivity