D0 Solenoid Upgrade Project: Rectangular Liquid Helium Tube, Miscellaneous Information

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Description

This engineering note contains miscellaneous information about the rectangular liquid helium supply tube for the D-Zero solenoid. The information is fairly superficial, but could be used as a starting point for a future engineer who is going to specify and puchase the tubing. The chimney contains 4 conductors attached to an aluminum liquid helium supply tube. Because good thermal contact is desired, the tube will have flat sides. Aluminum is chosen to match the thermal contraction coefficient of the superconductor's aluminum stabilizer. The type of aluminum is chosen as 6061-T6 because it's allowable stress in ANSI/ASME B31.3 is higher than … continued below

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3 pages

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Rucinski, R. May 26, 1993.

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Description

This engineering note contains miscellaneous information about the rectangular liquid helium supply tube for the D-Zero solenoid. The information is fairly superficial, but could be used as a starting point for a future engineer who is going to specify and puchase the tubing. The chimney contains 4 conductors attached to an aluminum liquid helium supply tube. Because good thermal contact is desired, the tube will have flat sides. Aluminum is chosen to match the thermal contraction coefficient of the superconductor's aluminum stabilizer. The type of aluminum is chosen as 6061-T6 because it's allowable stress in ANSI/ASME B31.3 is higher than for other alloys. A different alloy could be chosen for extrusion reasons. The highest pressures this tubing should see will be during a quench. Current calculations predict the peak pressure during a quench to be 520 psi a for one-way relieving and 250 psia for two way relieving. Whatever the final alloy selection, the tubing needs to have a high enough allowable working pressure. There is very little room in the obround section of the chimney. In that portion the shape is rectangular, 12.7 mm (0.50-inch) x 31.8 mm (1.25-inch). A drawing shows the flow path cross section. This also could be changed for extrusion reasons if necessary. The important thing here is to estimate the pressure drop and make sure it is acceptable. Pressure drop estimates for this cross section are acceptable since it only about 10 feet in length.

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  • May 26, 1993

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  • May 19, 2016, 3:16 p.m.

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  • Sept. 25, 2017, 8:14 p.m.

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Rucinski, R. D0 Solenoid Upgrade Project: Rectangular Liquid Helium Tube, Miscellaneous Information, report, May 26, 1993; Batavia, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc845923/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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