IPAC2015 - List of Authors (Andreev, N.)

Paper	Title	Page
WEPTY033	A Concept for a High-field Helical Solenoid	3345
	S. Krave, N. Andreev, R. Bossert, M.L. Lopes, J.C. Tompkins, R. Wands Fermilab, Batavia, Illinois, USA G. Flanagan Muons, Inc, Illinois, USA K.E. Melconian Texas A&M University, College Station, Texas, USA
	Funding: Fermi Research Alliance under DOE Contract DE-AC02-07CH11359 Helical cooling channels have been proposed for highly efficient 6D muon cooling to produce the required helical solenoidal, dipole, and gradient field components. The channel is divided into sections, each subsequent section with higher field. Simulations have shown that for the high-field sections the use of Nb3Sn superconductor is needed. A continuous winding method and novel stainless steel collaring system has been developed for use in the high field section of a helical cooling channel. Each collar layer is identical, for ease of fabrication, and assembled by both flipping and rotating the subsequent layers. Mechanical and magnetic simulations were performed using a combination of ANSYS and OPERA. The winding and collaring method has been demonstrated on a four coil prototype using a Nb3Sn Rutherford cable. Details of the mechanical design, magnetic modeling, and winding method are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPTY033
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WEPTY040	Quench Performance of the First Twin-aperture 11 T Dipole for LHC upgrades	3361
	A.V. Zlobin, N. Andreev, G. Apollinari, E.Z. Barzi, G. Chlachidze, A. Nobrega, I. Novitski, S. Stoynev, D. Turrioni Fermilab, Batavia, Illinois, USA B. Auchmann, S. Izquierdo Bermudez, M. Karppinen, L. Rossi, F. Savary, D. Smekens CERN, Geneva, Switzerland
	Funding: *Work is supported by Fermi Research Alliance, LLC, under contract No. DE-AC02-07CH11359 with the U.S. Department of Energy and European Commission under FP7 project HiLumi LHC, GA no.284404 The LHC luminosity upgrade plan foresees installation of additional collimators in Dispersion Suppressor areas around point 7 and interaction regions 1, 2 and 5. The required space for these collimators could be provided by replacing some 15-m long 8.33 T NbTi LHC main dipoles (MB) with shorter 11 T Nb3Sn dipoles (MBH) compatible with the LHC lattice and main systems. FNAL and CERN magnet groups are developing a 5.5-m long twin-aperture dipole prototype with the nominal field of 11 T at the LHC nominal current of 11.85 kA suitable for installation in the LHC. Two of these magnets with a collimator in between will replace one MB dipole. The single-aperture 2-m long dipole demonstrator and two 1-m long dipole models have been assembled and tested at FNAL in 2012-2014. The 1 m long collared coils were then assembled into the first twin-aperture Nb3Sn demonstrator dipole and tested. This paper reports test results of the first twin-aperture Nb3Sn dipole model focusing on magnet training, ramp rate sensitivity and temperature dependence of the magnet quench current. The twin-aperture dipole quench performance is compared with the data for the single-aperture models.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPTY040
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WEPTY041	DESIGN CONCEPT AND PARAMETERS OF A 15 T Nb3Sn DIPOLE DEMONSTRATOR FOR A 100 TEV HADRON COLLIDER	3365
	A.V. Zlobin, N. Andreev, E.Z. Barzi, V.V. Kashikhin, I. Novitski Fermilab, Batavia, Illinois, USA
	Funding: *Work is supported by Fermi Research Alliance, LLC, under contract No. DE-AC02-07CH11359 with the U.S. Department of Energy Hadron Colliders (HC) are the most powerful discovery tools in modern high energy physics. A 100 TeV HC in a ~100 km tunnel with a nominal operation field of ~15 T is being considered for the post-LHC era. The choice of a 15 T nominal field requires using the Nb3Sn technology. Practical demonstration of this field level in an accelerator-quality magnet and substantial reduction of magnet costs are key conditions for the realization of such a machine. FNAL has started the development of a 15 T Nb3Sn dipole demonstrator for a 100 TeV HC. As a first step in this direction, the existing 11 T dipole magnet, developed for LHC upgrades, will be modified by adding two layers to achieve the nominal field of 15 T in a 60 mm aperture. As the next step, to increase the field margin the innermost 2-layer coil will be replaced with an optimized coil using the conductor grading approach. This paper describes the design concept and parameters of the 15 T Nb3Sn dipole demonstrators. Magnetic, mechanical and quench protection issues are discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPTY041
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Paper

Title

Page

A Concept for a High-field Helical Solenoid

3345

S. Krave, N. Andreev, R. Bossert, M.L. Lopes, J.C. Tompkins, R. Wands
Fermilab, Batavia, Illinois, USA
G. Flanagan
Muons, Inc, Illinois, USA
K.E. Melconian
Texas A&M University, College Station, Texas, USA

Funding: Fermi Research Alliance under DOE Contract DE-AC02-07CH11359
Helical cooling channels have been proposed for highly efficient 6D muon cooling to produce the required helical solenoidal, dipole, and gradient field components. The channel is divided into sections, each subsequent section with higher field. Simulations have shown that for the high-field sections the use of Nb3Sn superconductor is needed. A continuous winding method and novel stainless steel collaring system has been developed for use in the high field section of a helical cooling channel. Each collar layer is identical, for ease of fabrication, and assembled by both flipping and rotating the subsequent layers. Mechanical and magnetic simulations were performed using a combination of ANSYS and OPERA. The winding and collaring method has been demonstrated on a four coil prototype using a Nb3Sn Rutherford cable. Details of the mechanical design, magnetic modeling, and winding method are presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPTY033

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WEPTY040

Quench Performance of the First Twin-aperture 11 T Dipole for LHC upgrades

3361

A.V. Zlobin, N. Andreev, G. Apollinari, E.Z. Barzi, G. Chlachidze, A. Nobrega, I. Novitski, S. Stoynev, D. Turrioni
Fermilab, Batavia, Illinois, USA
B. Auchmann, S. Izquierdo Bermudez, M. Karppinen, L. Rossi, F. Savary, D. Smekens
CERN, Geneva, Switzerland

Funding: *Work is supported by Fermi Research Alliance, LLC, under contract No. DE-AC02-07CH11359 with the U.S. Department of Energy and European Commission under FP7 project HiLumi LHC, GA no.284404
The LHC luminosity upgrade plan foresees installation of additional collimators in Dispersion Suppressor areas around point 7 and interaction regions 1, 2 and 5. The required space for these collimators could be provided by replacing some 15-m long 8.33 T NbTi LHC main dipoles (MB) with shorter 11 T Nb3Sn dipoles (MBH) compatible with the LHC lattice and main systems. FNAL and CERN magnet groups are developing a 5.5-m long twin-aperture dipole prototype with the nominal field of 11 T at the LHC nominal current of 11.85 kA suitable for installation in the LHC. Two of these magnets with a collimator in between will replace one MB dipole. The single-aperture 2-m long dipole demonstrator and two 1-m long dipole models have been assembled and tested at FNAL in 2012-2014. The 1 m long collared coils were then assembled into the first twin-aperture Nb3Sn demonstrator dipole and tested. This paper reports test results of the first twin-aperture Nb3Sn dipole model focusing on magnet training, ramp rate sensitivity and temperature dependence of the magnet quench current. The twin-aperture dipole quench performance is compared with the data for the single-aperture models.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPTY040

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reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPTY041

DESIGN CONCEPT AND PARAMETERS OF A 15 T Nb3Sn DIPOLE DEMONSTRATOR FOR A 100 TEV HADRON COLLIDER

3365

A.V. Zlobin, N. Andreev, E.Z. Barzi, V.V. Kashikhin, I. Novitski
Fermilab, Batavia, Illinois, USA

Funding: *Work is supported by Fermi Research Alliance, LLC, under contract No. DE-AC02-07CH11359 with the U.S. Department of Energy
Hadron Colliders (HC) are the most powerful discovery tools in modern high energy physics. A 100 TeV HC in a ~100 km tunnel with a nominal operation field of ~15 T is being considered for the post-LHC era. The choice of a 15 T nominal field requires using the Nb3Sn technology. Practical demonstration of this field level in an accelerator-quality magnet and substantial reduction of magnet costs are key conditions for the realization of such a machine. FNAL has started the development of a 15 T Nb3Sn dipole demonstrator for a 100 TeV HC. As a first step in this direction, the existing 11 T dipole magnet, developed for LHC upgrades, will be modified by adding two layers to achieve the nominal field of 15 T in a 60 mm aperture. As the next step, to increase the field margin the innermost 2-layer coil will be replaced with an optimized coil using the conductor grading approach. This paper describes the design concept and parameters of the 15 T Nb3Sn dipole demonstrators. Magnetic, mechanical and quench protection issues are discussed.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPTY041

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)