A new type of liquid-3He target system using small mechanical refrigerators

S. Kato, K. Kobayashi, K. Maruyama, H. Okuno, O. Konno, T. Suda, T. Maki, H. Asami, T. Koizumi

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


A new type of liquid-3He target has been developed for photoabsorption experiments at intermediate energies. Using the cooling power of liquid 4He at reduced vapour pressure, 3He gas is liquefied into a cylindrical target cell of 180 ml and is maintained at 2.0 K during the experiment. Evaporated 4He gas is evacuated by a rotary pump and returned into the 4He bath in the cryostat, where two small mechanical refrigerators with cooling capacities of 3 W at 4.3 K and 10 W at 20 K are operated for the purpose of 4He recondensation. A maintenance-free operation of more than 1000 hours has become possible by adopting the 4He circulation system.

Original languageEnglish
Pages (from-to)213-219
Number of pages7
JournalNuclear Inst. and Methods in Physics Research, A
Issue number2-3
Publication statusPublished - 1991 Oct 1

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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