Title :
A final-focus magnet system for PEP-II
Author :
Taylor, Charles E. ; Caspi, S. ; Saho, N.
Author_Institution :
Lawrence Berkeley Lab., CA, USA
fDate :
6/1/1995 12:00:00 AM
Abstract :
A compact quadrupole magnet has been designed for the final-focus of the 3 GeV/spl times/9 GeV PEP II B-factory collider being built at SLAC. The magnet system must fit within the particle detector, has no iron, and consists of four nested separately controlled magnets: a two-layer 11.95 T/m quadrupole; a horizontal dipole; a vertical dipole; and a 1.5 T solenoid. The 1.1 m long magnet must produce a highly uniform quadrupole field in the 120 mm ID beam pipe. The cryostat is 140 mm ID (warm), 314 mm OD, and approximately 1.5 m long. The very compact cryogenic suspension system using Ti alloy plates is designed to withstand large forces due to interaction between the field of the detector solenoid and the four nested magnets. Cryogenic services and magnet leads are provided through a single flexible transfer line approximately 4 m long.<>
Keywords :
accelerator magnets; colliding beam accelerators; cryostats; electron accelerators; electron beam focusing; solenoids; storage rings; superconducting device testing; superconducting magnets; 1.1 m; 1.5 T; 1.5 m; 120 mm; 3 GeV; 314 mm; 4 m; 9 GeV; PEP II B-factory collider; Ti alloy plates; cryogenic suspension system; cryostat; detector solenoid; final-focus magnet system; flexible transfer line; horizontal dipole magnet; particle detector; separately controlled magnets; solenoid; superconducting magnets; two-layer quadrupole magnet; vertical dipole magnet; Coils; Cryogenics; Laboratories; Magnetic separation; Radiation detectors; Solenoids; Structural beams; Superconducting cables; Superconducting magnets; Temperature;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
