Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Commissioning of neutron triple-axis spectrometers at HANARO

  • Hiraka, Haruhiro (Quantum Beam Science Division, Korea Atomic Energy Research Institute) ;
  • Lee, Jisung (Korea Basic Science Institute) ;
  • Jeon, Byoungil (Intelligent Computing Laboratory, Korea Atomic Energy Research Institute) ;
  • Seong, Baek-Seok (Quantum Beam Science Division, Korea Atomic Energy Research Institute) ;
  • Cho, Sangjin (Quantum Beam Science Division, Korea Atomic Energy Research Institute)
  • Received : 2019.09.30
  • Accepted : 2020.03.06
  • Published : 2020.09.25
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Abstract

We report the status of the cold neutron triple-axis spectrometer (Cold TAS) and thermal neutron triple-axis spectrometer (Thermal TAS) installed at HANARO. Cold TAS, whose specifications are standard across the world, is in the final phase of commissioning. Proper instrument operation was confirmed through a feasibility study of phonon measurements and data analyses with resolution convolution. In contrast, Thermal TAS is in the initial phase of commissioning, and improvement of the monochromator drum is now in progress from the viewpoint of radiation shielding. In addition, we report recent activities in the development of neutron basic elements, that is, film-coated Si-wafer collimators, which are promising for use in triple-axis spectroscopy, particularly in Cold TAS.

Keywords

Acknowledgement

We would like to thank S. Kim, J. Han, C. Kim, H. Kang, and Y. Kim (KAERI) for their technical help with regard to the instrumentation of TASs and development of film-coated collimators. We also wish to thank Dr. Y. Choi and Dr. S. Park (KAERI) for their initial design and construction of Thermal TAS and Cold TAS, respectively. We greatly appreciate the advice of Prof. Y. Noda (Tohoku University, Japan) on TAS instrumentation and the help of Dr. S. Yano (National Synchrotron Radiation Research Center, Taiwan) for the neutron transmission experiment on SIKA, which was conducted under the User Program of ANSTO Facilities: Proposal No. IC7569. The work at KAERI was conducted under the projects of "Neutron Basic Research on Scattering Instrument Optimization and Operation" (521210-18 and 521210-19) and "Optimization and Operation of Neutron Scattering Instrument for Quantum Materials Research" (524210-20).

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