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- W240341794 abstract "Demonstration pumping experiments, using a prototype of the JET Open Structure pumps [1] , have been conducted in the Neutral Injection Test Bed with argon frost at temperatures substantially below 4.2 K, the condensation temperature of 4 He. It has been shown for the first time that 3 He can be pumped in this manner at subcondensation temperatures and, to a certain extent, even at 4.2 K. Additionally, a full scale experiment has been carried out running both 4 He and 3 He gas pulses in the JET Octant 8 injector. For these measurements at least 4 or all 8 of the sources were pulsed and the substantially larger cryopumps were used (cross section of about 50 times that of the Test Bed prototype). It has been found that the results of the large scale experiment are qualitatively very similar to the ones obtained in the Test Bed. Quantitatively, normalising the flow to the pump area, it follows that the pressure rise measured in the large system is substantially higher than extrapolated straightforwardly from the prototype." @default.
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- W240341794 date "1991-01-01" @default.
- W240341794 modified "2023-09-26" @default.
- W240341794 title "PUMPING OF 3He AND 4He GAS USING ARGON FROSTED LIQUID HELIUM CRYO PUMPS AT SUB-CONDENSATION TEMPERATURES" @default.
- W240341794 cites W2318367375 @default.
- W240341794 doi "https://doi.org/10.1016/b978-0-444-88508-1.50076-1" @default.
- W240341794 hasPublicationYear "1991" @default.
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