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Development of a monoenergetic neutron field utilizing an accelerator deuteron beam
Park Hyeoungwoo,Kang Sinchul,Kim Jungho,Park Hyeonseo,Kim Joong Hyun,Yoon Young Soo 한국물리학회 2023 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.83 No.8
A monoenergetic neutron feld is an attractive environment for neutron metrology and the development of novel neutron detectors. Deuterium–deuterium and deuterium–tritium (DT) reactions with an accelerated deuteron beam produce 2.5 and 14.8 MeV monoenergetic neutrons, respectively. The Korea Research Institute of Standards and Science (KRISS) is developing a monoenergetic neutron feld facility with an accelerator that generates a deuteron beam to establish monoenergetic neutron measurement standards. An electrostatic accelerator with a maximum high voltage of 400 kV and beam current from 0.5 to 500 μA from High Voltage Engineering Europa BV was installed. For a tritiated titanium or deuterated titanium target deposited at 250 μg/cm2 on a 38 mm copper plate, a target chamber is developed by KRISS. The total neutron yield is limited to 5× 108 n/s, which is the maximum allowed emission rate resulting from the shielding capacitance of a laboratory wall shield. The corresponding deuteron beam current of the DT reaction with the maximum emission rate is approximately 15 μA. Furthermore, various additional studies such as beam current monitoring, target temperature monitoring, air cooling for the target, and beam profle measurement have been performed for the stable generation of the monoenergetic neutron feld.
Kang Sinchul,Kim Jungho,Kim Joong Hyun,Park Hyeonseo,Park Hyeoungwoo,Yoon Young Soo 한국물리학회 2023 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.82 No.6
The Korea Research Institute of Standards and Science (KRISS) has developed and maintained neutron calibration facilities and neutron measurement systems, providing national standards on neutron dose equivalent, neutron fuence, and neutron emission rate for Korea. Neutron calibration facilities at KRISS include neutron irradiation facilities and neutron sources, such as radioactive isotope neutron sources, thermal neutrons, and mono-energetic neutrons. Neutron measurement systems at KRISS include the Bonner sphere spectrometer and a manganese-sulfate bath measurement system. The neutron standard facilities and measurement systems at KRISS have supported the researchers. Here, we introduce the ongoing research and development of neutron measurement systems, such as the mono-energetic neutron feld generation system, which is currently under development and will be operational within a few months.