Title :
Permanent dipole magnets for the 8 GeV transfer line at FNAL
Author :
Glass, H.D. ; Brown, B.C. ; Foster, G.W. ; Fowler, W.B. ; Haggard, J.E. ; Harding, D.J. ; Jackson, G.P. ; May, M.P. ; Nicol, T.H. ; Ostiguy, J.F. ; Schlabach, P. ; Smith, G.A. ; Volk, J.T.
Author_Institution :
Fermi Nat. Accel. Lab., Batavia, IL, USA
Abstract :
The transfer line that will serve to transport 8 GeV protons from the Booster to the new Fermilab Main Injector has been built using permanent magnets. A total of 46 horizontal bend dipoles and 5 vertical bend dipoles were built for this beamline; 67 gradient magnets were also built. The magnets were built using magnetized strontium ferrite bricks. Thermal compensation of these bricks was effected by use of a nickel-iron alloy. The dipole magnets were built with a mean integrated strength of 0.56954 T-m, and an rms spread of 0.06%. The magnets were thermally cycled from 20°C to 0°C to condition the ferrite against irreversible thermal losses, and the compensation was measured with a flipcoil. The magnet strength was adjusted by varying the number of bricks installed at the magnet ends. Details of the assembly process and a summary of magnetic measurements are presented here
Keywords :
beam handling equipment; permanent magnets; 8 GeV; 8 GeV transfer line; FNAL; gradient magnets; horizontal bend dipoles; irreversible thermal losses; magnet strength; magnetized strontium ferrite bricks; mean integrated strength; nickel-iron alloy; permanent dipole magnets; permanent magnets; thermal compensation; vertical bend dipoles; Aluminum; Assembly; Ferrites; Magnetic flux; Magnetic materials; Permanent magnets; Protons; Steel; Strontium; Temperature;
Conference_Titel :
Particle Accelerator Conference, 1997. Proceedings of the 1997
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-4376-X
DOI :
10.1109/PAC.1997.753173
