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Abstract
HANARO is a 30 MW multi-purpose research reactor located at the Korea Atomic Energy Research Institute (KAERI) with a maximum thermal flux of 5.4 × 1014 n/cm2/s. It reached first criticality in 1995. As part of its present cold neutron project, the KAERI selected disk chopper time-of-flight (DC-TOF) spectrometer as one of the day-one instruments. In this report, we present the current design of our DC-TOF. In order to optimize the design parameters of DC-TOF and its guide layout, we made full use of two Monte-Carlo simulation codes, VITESS and McStas. We have also optimized technical parameters using analytical tools, whenever possible.
Acknowledgements
We thank several experts in the field for their valuable advice. In particular, we are grateful to Dr R. Lechner for his comments and suggestions and Drs R. Bewley and J. Ollivier for their helpful discussions. One of us (JYS) acknowledges the financial support of the KOSEF during his stay at the HMI. Work at Sungkyunkwan University was supported by the CNRF project of the KAERI the BAERI program of the MOST.