By R. F. Blanks, K. D. Timmerhaus (auth.), K. D. Timmerhaus (eds.)
The 1959 Cryogenic Engineering convention Committee is happy to pre despatched the papers of the 1959 Cryogenic Engineering convention. we're lucky to have had the collage of California at Berkeley, Ca!., as our host for the 5th nationwide assembly of this sort. The flow to the West Coast for this earlier Cryogenic Engineering convention was once brought on partly via the big focus of missile actions that are to be chanced on there. reputation of cryogenic operations and strategies within the mis sile box is given in lots of of the integrated papers. The college of California was once definitely wen fitted to the sort of assembly as this since it was once right here that a lot early paintings was once performed in cryogenics. This pioneering in cryogenics continues to be glaring this present day within the operation of the 72-in. bub ble chamber on the Lawrence Radiation Laboratory. The Cryogenic Engineering convention salutes the missile and the cryogenic pioneers of the day past and at the present time on the collage of California. unique thank you needs to visit Dr. D. N. Lyon from the Low-Temperature Laboratory of the college of California, who as chairman of the 1959 Cryogenic Engineering convention Committee has labored tirelessly to extend the stature of this convention. vii ACKNOWLEDGMENT The Cryogenic Engineering convention Committee is deeply thankful for the continuing aid and curiosity of the next companies who made the 1959 Cryogenic Engineering convention attainable. Aerojet-General company A. D. Little, Inc.
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Extra resources for Advances in Cryogenic Engineering: Proceedings of the 1959 Cryogenic Engineering Conference University of California, Berkeley, California September 2–4, 1959
The chamber material must have high strength and good ductiIity at low temperature because of the impact load. High electrical resistivity at low temperature is desirahle to reduce eddy current forces should the magnet power faU. 05 between room temperature and 20'K to reduce distortions in the magnetic field. In addition, the permeability must remainconstantbecause the magnetic field was measured at room temperature with the chamber removed. li. It would have been very difficult to measure the magnetic field with liquid hydrogen in the chamber.
It is assumed that a helium gas refrigeration eyc1e would be an attractive possibility with the refrigerator gas passing directly through the eolls. Thecyc1e involved might resemble that of a helium liquefier, except liquid temperature would never be reached. A schematic diagram of a simple gas cyc1e with two expansion engines is shown in Fig. 4. The temperatures andpressures shownare not necessarily optimum values. The ratio of compressorwork to refrigeration is about 100. For the above pair of coils, a compressor capacity of about 5000 kw would be required.
004 w/cm 3 , or less than one millionth of that which Is successfully used in high-field magnets (such as the Bitter magnet) in the laboratory. This means that relatively simple gas coolingsystems, using helium as the coolant, should be more thanadequateto cope with the heat transfer problem. Aiding the heat transfer problem is the fact that the thermal conductivity of the conductors will become substantially higher at low temperatures, relative to values at room temperature. 3 w/cm-deg at room temperature.
Advances in Cryogenic Engineering: Proceedings of the 1959 Cryogenic Engineering Conference University of California, Berkeley, California September 2–4, 1959 by R. F. Blanks, K. D. Timmerhaus (auth.), K. D. Timmerhaus (eds.)