Title :
Quench and mechanical behavior of an LHC low-/spl beta/ quadrupole model
Author :
Nakamoto, T. ; Tanaka, K. ; Yamamoto, A. ; Tsuchiya, K. ; Barkhardt, E. ; Higashi, N. ; Kimura, N. ; Ogitsu, T. ; Ohuchi, N. ; Sasaki, K. ; Shintomi, T. ; Terashima, A. ; Kirby, G.A. ; Ostojic, R. ; Taylor, T.M.
Author_Institution :
KEK, High Energy Accel. Res. Organ., Ibaraki, Japan
fDate :
6/1/1999 12:00:00 AM
Abstract :
A one meter model of the high gradient 70 mm aperture superconducting low-/spl beta/ quadrupole has been developed at KEK. The design field gradient is 240 T/m at a current 7677 A with a superconducting load line ratio of 92% and peak field of 9.64 T in the coil. A first series of training tests of the magnet was carried out at 1.9 K including a full thermal cycle to room temperature. The highest quench current was 8007 A corresponding to a field gradient of 250 T/m. The magnet was subsequently reassembled to improve its longitudinal mechanical structure. In this paper, quench characteristics and mechanical behavior of the first model magnet are presented.
Keywords :
accelerator magnets; storage rings; superconducting magnets; synchrotrons; 1.9 K; 70 mm; 7677 A; 8007 A; 9.64 T; KEK; LHC; full thermal cycle; longitudinal structure; low-/spl beta/ quadrupole model; magnet training tests; magnetic field gradient; mechanical behavior; mechanical structure; quench behavior; quench current; superconducting load line ratio; superconducting low-/spl beta/ quadrupole; Artificial intelligence; Assembly; Circuit testing; Integrated circuit testing; Large Hadron Collider; Magnetic field induced strain; Magnetic flux; Strain measurement; Superconducting coils; Superconducting magnets;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
