The coil of the MBI bending magnets for the LHC injection transfer lines

Author

Labutsky, S. ; Mejidzade, V. ; Pupkov, Yu. ; Rouvinsky, E. ; Sukhina, B.

Author_Institution

Inst. of Nucl. Phys., Acad. of Sci., Novosibirsk, Russia

Volume

12

Issue

1

fYear

2002

fDate

3/1/2002 12:00:00 AM

Firstpage

228

Lastpage

231

Abstract

All MBI bending magnets in each of the two LHC injection transfer lines will be powered in series. The limited output voltage of existing power converters lead to an unusual coil design avoiding external return bus-bars by combining two overlapping half-coils, electrically separated, with 3 1/2 turns each in a monolithic structure. The voltage between turns in one coil can reach up-to 3.6 kV. The coil has been designed with particular care for obtaining high interturn and ground insulation. Flux-free soldering of connections with plug-in cone sleeves is applied, allowing to execute water cooled current connections as prolongation of the coil conductor. Epoxy compound polymerization in the impregnation mould is obtained by passing overheated water in regulated cycles through the water circuit of the coil conductor. We describe the design basics as well as various test results of pre-series and series produced coils.

Keywords

accelerator magnets; colliding beam accelerators; particle beam injection; proton accelerators; storage rings; superconducting magnets; LHC injection transfer lines; MBI bending magnets; epoxy compound polymerization; flux-free soldering; ground insulation; interturn insulation; monolithic structure; output voltage; overlapping half-coils; power converters; pre-series produced coils; series produced coils; unusual coil design; water cooled current connections; Circuits; Coils; Conductors; Insulation; Large Hadron Collider; Lead; Magnets; Polymers; Soldering; Voltage;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2002.1018388

Filename

1018388