• Title/Summary/Keyword: Basic Science

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Cool-down test of HWR cryomodule for RAON

  • Kim, Y.;Lee, M.;Jo, Y.W.;Choi, J.W.;Kim, H.;Kim, W.K.;Kim, H.J.
    • Progress in Superconductivity and Cryogenics
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    • v.17 no.4
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    • pp.43-46
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    • 2015

  • The heavy ion accelerator that will be built in Daejeon utilizes four types of superconducting cavities. Cryomodules holding the superconducting cavities in them supply thermal insulation for cavities operating in 4.3 K or 2.1 K. A Prototype of cryomodule which holds two HWR (Half Wave Resonator) cavities was fabricated and tested. Since the operating temperature of the HWR is 2.1 K, the superfluid helium was generated with warm vacuum pumping system. The cyromodule was successfully cooled down below lambda point temperature of helium and any detectable leak was not observed during the test. The static thermal load at 4.2 K was measured. The result and the experience for the cool-down below lambda point of helium are reported in this paper.

  • https://doi.org/10.9714/psac.2015.17.4.043 인용 PDF KSCI

$^{19}F$ MR Imaging of 5-FU Metabolism in Mice

  • Chaejoon Cheong;Lee, Seung-C.;Jae-G. Seo;Kim, Sung W.;Lee, Chulhyun;Kim, Chul S.;Taegyun Yang
    • Journal of the Korean Magnetic Resonance Society
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    • v.5 no.2
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    • pp.110-117
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    • 2001

  • $^{19}$ F imaging of mice was carried out. For $^{19}$ F imaging, 5-flouro-uracil (5-FU) was injected into a mouse and in vivo detection of the catabolism of 5-FU to a-fluoro-P-alanine (FBAL) was carried out. The chemical shift selective (CHESS) imaging technique was employed. The 19F spectra and images give temporal and spatial information of the metabolism for 5-FU in mice.

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