โ Scribed by D.B. Green
No coin nor oath required. For personal study only.
at the International Congress Centre, Amsterdam. Included in the proceedings was a cryogenics session which was chaired by K. Hoselitz and J. Volger, and attended by some two hundred physicists and engineers.
The session opened with an invited paper read by A. D. Appleton in which he outlined the developments in superconducting machine technology which have taken place over the last five years. He also dealt with the design problems associated with the large superconducting field windings of a 3 250 h p motor, destined for service at the power station at Fawley, UK. On the basis of a present time cost analysis, he predicted that within the foreseeable future the use of superconducting machines for high power applications will become universal.
The field of speculation was considerably enlarged by D. Tesdall, who, in considering the possible applications of superconductivity, emphasized the comparatively favourable conditions of deep space for the attainment of the low temperatures necessary for the operation of superconducting devices. He suggested that such devices may play a major part in increasing the over-all efficiency of a space vehicle, both by the reduction of the electrical power losses and by the improved performance of various sensing circuits. A refrigeration process based upon the evaporation of excess liquid hydrogen fuel was proposed, the effectiveness of which was disputed when the paper was opened to the floor.
Included in the session were three papers directly concerned with superconducting magnet technology. Two of these were presented by E. Schrader, in the first of which he dealt with the problem of the superconducting magnet size effect, whereby the current attainable in high current density magnets decreases as the size of the magnets increase. This effect was afforded a theoretical treatment in terms of an induced energy which must be added to the local energy due to the magnetization currents breakdown. By this device, Schrader is able to predict the actual critical current changes resulting from increases in the coil geometry.
In Schrader's second paper, given on behalf of H. Schindler, the operating characteristics and design of a three section modular all Nb3Sn magnet were described.
๐ SIMILAR VOLUMES
Westenberg reviewed the application of ESR to determination of the rates of elemental reactions in the gas phase; for reactions of atoms (H, 0, N, and C1) it is possible in many cases to measure rates relatively precisely by this method over a very wide temperature range (200-1000ยฐK); he also presen
## Background: This annual report to the nation addresses progress in cancer prevention and control in the u.s. with a special section on colorectal cancer. this report is the joint effort of the american cancer society, the national cancer institute (nci), the north american association of central