DFBX boxes - electrical and cryogenic distribution boxes for the superconducting magnets in the LHC straight sections

Author

Zbasnik, J.P. ; Corradi, C.A. ; Gourlay, S.A. ; Green, M.A. ; Hafalia, A.Q., Jr. ; Kajiyama, Y. ; Knolls, M.J. ; LaMantia, R.F. ; Rasson, J.E. ; Reavill, D. ; Turner, W.C.

Author_Institution

Lawrence Berkeley Nat. Lab., CA, USA

Volume

13

Issue

2

fYear

2003

fDate

6/1/2003 12:00:00 AM

Firstpage

1906

Lastpage

1909

Abstract

DFBX distribution boxes provide cryogenic and electrical services to superconducting quadrupoles and to a superconducting dipole at either end of four of the long straight sections in the LHC. The DFBX boxes also provide instrumentation and quench protection to the magnets. Current for the quadrupole and the dipole magnet is delivered through leads that combine HTS and gas cooled leads. Current for the 600 A and 120 A correction magnets is provided by pure gas-cooled leads. The bus bars from the leads to the magnets pass through low leak-rate lambda plugs between 1.8 K and 4.4 K. The heat leak into the 1.9 K region from the liquid helium tank is determined by the design of the lambda plugs. This paper describes the DFBX boxes and their function of delivering current and instrumentation signals to the magnets.

Keywords

accelerator magnets; colliding beam accelerators; storage rings; superconducting magnets; 1.8 to 4.4 K; 120 A; 600 A; DFBX distribution box; HTS lead; LHC straight section; bus bar; cryogenic services; current signal; dipole magnet; electrical services; gas-cooled lead; heat leak; instrumentation signal; lambda plug; liquid helium tank; quadrupole magnet; quench protection; superconducting magnet; Bars; Cooling; Cryogenics; Helium; High temperature superconductors; Instruments; Large Hadron Collider; Plugs; Protection; Superconducting magnets;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2003.812943

Filename

1211983