Nuclear Data for Accelerator Driven Systems
Development of Method for Experimental Measurement of Nuclear Data Needed for Accelerator Waste Transmutation
Tech Area / Field
- INS-DET/Detection Devices/Instrumentation
- PHY-ANU/Atomic and Nuclear Physics/Physics
8 Project completed
Senior Project Manager
Kulikov G G
Joint Institute of Nuclear Research, Russia, Moscow reg., Dubna
- University of British Columbia, Canada, BC, Vancouver\nLos-Alamos National Laboratory, USA, NM, Los-Alamos\nJapan Atomic Energy Agency, Japan, Ibaraki\nKyushu University, Japan, Fukuoka
Project summaryIn the proposed research, we develop a new experimental method for charged-particle measurements with an extremely wide energy acceptance, moderate energy resolution, and high efficiency above 400 MeV, which is specifically designed for measurements of double differential cross sections (DDXs) as nuclear data needed for realization of Accelerator Driven Systems (ADSs). Moreover, a data analysis system for this method is established through actual measurements and an optimum parameter search for data reduction.
In several countries, research on ADSs is already underway for numerous applications, from energy production to transmutation of long-lived nuclear waste. Since ADSs utilize proton accelerators with energies in the range of 400 to 3000 MeV, a variety of nuclear data are required for their realization. However, the presently available data are insufficient in terms of both quantity and quality. In particular, in the energy range above 400 MeV, no complete energy spectra have been measured for charged-particle production reactions, and their measurement is urgently required. In this energy range, there is no suitable measurement method for obtaining DDX nuclear data of both neutrons and charged particles. It is necessary to develop a new method that enables measurements of high-quality DDX nuclear data at beam energies above 400 MeV.
In this project, we propose and develop a new experimental method based on a combination of Time-Of-Flight and Pulse-Height measurement methods. This is realized only with the use of crystals of Lutetium Yttrium OrthoSilicate (LYSO), which have been newly developed and demonstrated to be capable of a fast response and high light output. In the project, we also study the characteristics of large LYSO crystals with the aim of applying them to the detector system. To determine optimum parameters and to prove the capability of this method, nuclear data measurements are carried out for DDXs in the range of 400 to 600 MeV with the help of detailed simulations. Furthermore, we establish a data analysis system designed for general use. The experimental method and data analysis system developed in this research are expected to be useful in future nuclear data measurements up to 3 GeV in the J-PARK project of Japan.