Download Advances in Cryogenic Engineering by V. A. Ovcharenko (auth.), K. D. Timmerhaus (eds.) PDF

By V. A. Ovcharenko (auth.), K. D. Timmerhaus (eds.)

In past due 1877, Louis Cailletete in France and Raoul Pictet in Switzerland independently succeeded in liquefying oxygen, thereby proving a speculation set forth by way of Antoine Lavoisier approximately a hundred years prior. The subject matter of the 1977 Cryogenic Engineering convention "Cryogenics: A Century of Progress-A Chal­ lenge for the long run" safely honored this accomplishment through reviewing many of the noteworthy advances due to the fact that that point and outlining many advances nonetheless to come back. either Volumes 23 and 24 of this sequence offer a great account of the various contributions that have been provided at this convention. The 1977 Cryogenic Engineering convention used to be safely back held in Boulder, Colorado the place the 1st Cryogenic Engineering convention used to be initiated 23 years in the past by means of the past due Russell B. Scott, then leader of the Cryogenic Engineering Laboratory of the nationwide Bureau of criteria. The Cryogenic Engineering convention Board is intensely thankful to individuals of the nationwide Bureau of criteria and the collage of Colorado for serving as hosts for this assembly of cryogenic experts from worldwide. The Cryogenic Engineering convention is back happy to have had the overseas Cryogenic fabrics convention co-host this biennial assembly for the second one time in succession. This joint attempt back has accredited an in-depth insurance of analysis on technical fabrics in parts presently receiving basic cognizance by means of the cryogenic engineering neighborhood. The court cases of the Inter­ nationwide Cryogenic fabrics convention can be released as quantity 24 of the Advances in Cryogenic Engineering.

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The magnet system has been designed [1-3] and built by Argonne National Laboratory. The entire magnet system was successfully tested to full design field in May 1977. It was then delivered to Moscow in June 1977, and the first energization of the magnet system is expected in early 1978. The cryogenic aspects of the magnet system are presented in an earlier paper [4]. This paper first briefly reviews the magnet design and the coil cryostability. Second, the experiences of coil fabrication and coil assembly, magnet instrumentation and control, and results of magnet performance tests are described in detail.

Magnet initial cooldown curve. \ 6 10 12 16 R. C. Niemann et al. directly to the magnet. 2 K, liquid helium is introduced directly into the bottom of the cryostat through the fill and withdrawal line. After filling, the helium level is maintained by transfer through the topping line. During operation of the magnet, filling of both the liquid nitrogen reservoir and the cryostat takes place automatically. Refilling of the main supply dewar is manual, but can be accomplished remotely from the control room.

6· , ........ /'f 2 Ii ,~. ~ \, \, '. ". o 12 24 36 48 60 72 84 96 108 12 0 132 144 156 168 Z, INCHES Fig. 7, Field mappings along the MHD channels. Field Mapping. The field within the MHO warm bore was measured with a search coil and an integrator with known calibration constants and RC time constant. The magnet current was kept at 112 A throughout the field measurement. The field was also measured with a hall probe, Figure 7 shows the field measurement data along the MHO channel at various radial positions.

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