The production of a condensed hydrogen jet target in vacuo

✍ Scribed by V.D. Bartenev; A.I. Valevich; Yu.K. Pilipenko; V.V. Smelyanskii

• Publisher: Elsevier Science
• Year: 1973
• Tongue: English
• Weight: 441 KB
• Volume: 13
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(73)90100-8

✦ Synopsis

the specimen chamber. The rate of cooling and the required specimen temperature depend on the rate of pumping the helium vapour, controlled by valve 23.

Results of tests

It was shown that the cryostat achieves cooling and temperature control of the specimen over the whole temperature range to an accuracy of + 0.1 K. The lowest specimen temperature attained was 5 K. At the minimum specimen temperature the liquid helium consumption is 120 cm3h "1 ; less liquid is required to obtain higher temperatures. There is no temperature gradient along the surface of the specimen.

The specimen could he rotated and aligned freely at all temperatures. The cryostat weight was less than 7 kg. The reliability of operation of the cryostat was checked by studying the lattice parameters of pure copper and comparing the results with those in the literature.

The authors are grateful to V. I. Grushko, N. I. Kuznetsov, and A. I. Tostov for help in building and testing the cryostat.