# 2019 Symposium on Nuclear Data 2019年度核データ研究会

28-30 November 2019
C-CUBE, Kyushu University Chikushi Campus 九州大学筑紫キャンパス総合研究棟 (C-Cube)
Asia/Tokyo timezone
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# Contribution Oral

C-CUBE, Kyushu University Chikushi Campus 九州大学筑紫キャンパス総合研究棟 (C-Cube) - Chikushi Hall 筑紫ホール

# Construction status and future plan for RAON and its nuclear data production system

## Speakers

• Prof. Moses CHUNG

## Abstract

The Institute for Basic Science (IBS), located in Daejeon, Korea, was established in 2011 by the Korean government. The IBS has 28 Research Centers, one of which is the Rare Isotope Science Project (RISP). The accelerator complex for RISP was named RAON, which is a Korean word meaning “joy” or “happiness”. The goal of the RISP is to produce a variety of stable and rare isotope beams which can be used in a variety of basic scientific research and applications. The RAON can deliver ions from protons to uranium. Proton and Uranium beams are accelerated up to 600 MeV and 200 MeV/u, respectively. The RAON will produce isotopes by using both In-Flight (IF) fragmentation and Isotope Separation On-Line (ISOL) methods. The IF system uses a driver linac which consists of superconducting ECR ion sources, a low energy beam transport (LEBT) section, a 500 keV/u RFQ, a medium energy beam transport (MEBT) section, a superconducting (SC) linac for a 400 kW in-flight fragmentation facility. The ISOL system uses a proton cyclotron as a driver, which accelerates protons to 70 MeV at 1 mA for ISOL facility. The ISOL facility uses an SC linac for post-acceleration of rare isotopes up to about 18.5 MeV/u, while the SC linac of IF facility is capable of accelerating uranium beams up to 200 MeV/u at 8 p$\mu$A.

There are seven experimental systems that are under construction, which include KOBRA, LAMPS, MMS, CLS, muSR, BIS, and NDPS. The Nuclear Data Production System (NDPS) is an experimental system for measuring nuclear data by use of neutron Time-of-Flight detection systems. The RAON provides deuterons and protons up to 53 MeV and 88 MeV, respectively. They are accelerated by a superconducting driver LINAC (SCL3) and are delivered to the neutron production target to produce neutrons. Pulsed beams with up to $\sim$12 $\mu$A can be used to measure neutron-induced cross sections. By using high energy neutrons, nuclear data such as fission cross section of actinides and (n, xn) cross sections can be measured. The range of the beam repetition rate is to be 1 kHz $\sim$ 1 MHz. The beam width of the pulsed beams is an important factor determining the accuracy of nuclear data and is aimed to be as small as 1$\sim$2 ns.

This presentation will discuss the present status of RAON and its NDPS system, and would like to promote international collaboration.