Advances in Cryogenic Engineering by David E. Andrews (auth.), R. W. Fast (eds.)

By David E. Andrews (auth.), R. W. Fast (eds.)

The 1987 joint Cryogenic Engineering Conference/International Cryogenic fabrics convention was once held on the Pheasant Run inn, St. Charles, lliinois from June 14 to 18. Fermi nationwide Accelerator Laboratory, positioned a couple of kilometers from Pheasant Run, was once the host for this convention. there's a good deal of cryogenic examine and improvement underway at Fermilab and plenty of functions of cryogenic fabrics and structures are in rou­ tine, day-by-day use on the Tevatron. The technical software for the joint convention had over three hundred invited and contributed papers from many alternative nations. The CEC board and i've attempted to dramatically shorten the book time of this quantity of Advances in Cryogenic Engineering. so as to aid meet the target of the February ebook, I requested the reviewers to accomplish their studies earlier than leaving Pheasant Run, after the convention. i need to thank all the reviewers for his or her steered and throughtful studies. I greatly have fun with the authors following the prescribed layout and responding fast to my requests for revisions.

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0 rlcm Fig. 8. Magnetic field map in the coil. Fig. 9. 0 Force distribution (azimuthal line force in k;\1/m per sector). 29 Fig. 10. Cross section of the coil support structure. Iron shielding TOSCA was used to compute the iron contribution to the field. Fig. 2 K and has a C-type cross section with an inner radius of 20 em. The iron contribution is 12% at 4 T. Fig. 12 shows the fielJs obtained from magnetisation integration in the good field region for two different currents. Since this iron shield creates a quadrupole field which is, however, small enough to be compensated by the lattice quadrupoles its use is not yet decided.

5 .!.! ___J -5 0 4 Deviation from magnet axis r/cm Fig. 3. Field deviation for the curved and straight start design and for the final design E 54. ------, 0 r/cm 10 Fig 4. Cross-section of the upper half of dipole E ;)4 The unsymmetric sectors in the 4th shell compen'Jte the quadrupole field caused by curvini; the straight quadrupole-free dipole magnet. having rectangular cross-section. For the horizontal arcs a routine based on published formulae8 is used showing no divergences in the vicinity of the conductor.

E. R. Margulis, Nuclear Magnetic Resonance in Medicine, lgaku-Shoin, New York (1981). 3. P. G. Morris, NMR Imaging in Biomedicine, Academic Press, New York, (1982). 4. E. E. 5, pp. 245-261, (1984). 5. A. T. Laskaris, "Magnets for Magnetic Resonance in Medical Diagnostics: From the Laboratory to a Product," Proceedings of the 9th International Conference on Magnet Technology, SIN, CH-5234 Villigen, Switzerland, pp 231-235 (1986). 6. H. Zijlstra, "Permanent Magnet Systems for NMR Tomography," Philips Journal of Research, Vol40, No.

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