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Title: Field quality measurements of Fermilab Nb(3)Sn common coil dipole model

Abstract

A short model of single-layer Nb{sub 3}Sn common coil magnet has been fabricated and is being tested at Fermilab. This paper summarizes results of magnetic measurements in this model. The geometrical harmonics, coil magnetization and iron saturation effects, ramp-rate dependence, field decay and the ''snap-back'' effect at injection are presented.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Fermi National Accelerator Lab., Batavia, IL (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
15011773
Report Number(s):
FERMILAB-CONF-03-319-E
TRN: US0501423
DOE Contract Number:
AC02-76CH03000
Resource Type:
Conference
Resource Relation:
Journal Name: IEEE Trans.Appl.Supercond.14:287-290,2004; Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: IEEE Trans.Appl.Supercond.14:287-290,2004; PBD: 1 Nov 2003
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; DECAY; DIPOLES; FERMILAB; HARMONICS; IRON; MAGNETIZATION; MAGNETS; SATURATION; ACCELERATORS

Citation Formats

Kashikhin, V.S., Andreev, N., Dimarco, J., Feher, S., Kashikhin, V.V., Lamm, M., Novitski, I., Orris, D., Schlabach, P., Sylvester, C., Tartaglia, M., Velev, G., Zlobin, A.V., and Fermilab. Field quality measurements of Fermilab Nb(3)Sn common coil dipole model. United States: N. p., 2003. Web.
Kashikhin, V.S., Andreev, N., Dimarco, J., Feher, S., Kashikhin, V.V., Lamm, M., Novitski, I., Orris, D., Schlabach, P., Sylvester, C., Tartaglia, M., Velev, G., Zlobin, A.V., & Fermilab. Field quality measurements of Fermilab Nb(3)Sn common coil dipole model. United States.
Kashikhin, V.S., Andreev, N., Dimarco, J., Feher, S., Kashikhin, V.V., Lamm, M., Novitski, I., Orris, D., Schlabach, P., Sylvester, C., Tartaglia, M., Velev, G., Zlobin, A.V., and Fermilab. Sat . "Field quality measurements of Fermilab Nb(3)Sn common coil dipole model". United States. doi:. https://www.osti.gov/servlets/purl/15011773.
@article{osti_15011773,
title = {Field quality measurements of Fermilab Nb(3)Sn common coil dipole model},
author = {Kashikhin, V.S. and Andreev, N. and Dimarco, J. and Feher, S. and Kashikhin, V.V. and Lamm, M. and Novitski, I. and Orris, D. and Schlabach, P. and Sylvester, C. and Tartaglia, M. and Velev, G. and Zlobin, A.V. and Fermilab},
abstractNote = {A short model of single-layer Nb{sub 3}Sn common coil magnet has been fabricated and is being tested at Fermilab. This paper summarizes results of magnetic measurements in this model. The geometrical harmonics, coil magnetization and iron saturation effects, ramp-rate dependence, field decay and the ''snap-back'' effect at injection are presented.},
doi = {},
journal = {IEEE Trans.Appl.Supercond.14:287-290,2004},
number = ,
volume = ,
place = {United States},
year = {Sat Nov 01 00:00:00 EST 2003},
month = {Sat Nov 01 00:00:00 EST 2003}
}

Conference:
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  • A short model of single-layer Nb{sub 3}Sn common coil magnet has been fabricated and is being tested at Fermilab. This paper summarizes results of magnetic measurements in this model. The geometrical harmonics, coil magnetization and iron saturation effects, ramp-rate dependence, field decay and the ''snap-back'' effect at injection are presented.
  • A short Nb{sub 3}Sn dipole model based on a single-bore cos-theta coil with a cold iron yoke has been fabricated and tested recently at Fermilab. Field quality was measured at room temperature during magnet fabrication and at helium temperature. This paper reports the results of cold magnetic measurements. The geometrical harmonics, the coil magnetization effect caused by persistent currents in superconductor and eddy current in the cable, the ''snap-back'' effect at injection are presented and compared with theoretical predictions.
  • Fermilab, in collaboration with LBNL, is exploring the use of the react and wind technique for a common coil dipole with a Nb{sub 3}Sn Rutherford cable. An R and D program on conductor design and magnet technology was begun aiming at an 11 T, 2 layer, 30 mm aperture design operating at 4.5 K. The goal is to explore the feasibility of the react and wind technique for flat coils with a minimum bending radius of 90 mm. In order to improve the understanding of the I{sub c} degradation caused by bending after reaction this effect will be studied onmore » both strands and cables. In this paper, the authors present two techniques to measure the critical current degradation due to bending, both in wires and cables, using standard test facilities. Together with the description of the program they show the results of the first measurements on strands and the layout of the cables that are being produced.« less
  • Common coil dipole magnets based on Nb{sub 3}Sn conductor and the React and Wind technology are a promising option for the next generation of hadron colliders. The react and wind technology has potential cost benefits in terms of cable insulation, structural materials and magnet fabrication. A common coil design allows the use of pre-reacted Nb{sub 3}Sn superconductor with low critical current degradation after bending. Fermilab in collaboration with LBNL is involved in the development of a single-layer common-coil dipole magnet with maximum field of 11 T and 40-50 mm aperture, for a future VLHC. The current magnetic and mechanical designsmore » of the dipole model, magnet parameters along with the status of the program, are reported in this paper.« less
  • A dipole magnet based on the common coil design, using prereacted Nb{sub 3}Sn superconductor, is under development at Fermilab, for a future Very Large Hadron Collider. This magnet has some innovative design and technological features such as single layer coils, a 22 mm wide 60-strand Rutherford type cable and stainless steel collars reinforced by horizontal bridges inserted between coil blocks. Both left and right coils are wound simultaneously into the collar structure and then impregnated with epoxy. In order to optimize the design and fabrication techniques an R&D program is underway. The production of cables with the required characteristics wasmore » shown possible. Collar laminations were produced, assembled and tested in order to check the effectiveness of the bridges and the validity of the mechanical design. A mechanical model consisting of a 165 mm long section of the magnet straight section was assembled and tested. This paper summarizes the status of the program, and reports the results of fabrication and test of cable, collars and the mechanical model.« less