Development of a new method of mass analysis by the FFAG accelerator and its application to the investigation of the astrophysical nuclear reaction 12C+alpha

2016 Fiscal Year Final Research Report

• Project/Area Number: 26400294
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Kyushu University
• Principal Investigator: IKEDA Nobuo 九州大学, 工学研究院, 教授 (70193208)
• Co-Investigator(Renkei-kenkyūsha): ARIMA Hidehiko 九州大学, 工学研究院, 助教 (20253495) ; YONRMURA Yujiro 九州大学, 工学研究院, 助教 (20452815)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 不安定核ビーム / FFAG加速器 / 大アクセプタンス / 零色収差 / 天体核反応

Outline of Final Research Achievements

A new method of high-purity radioactive ion beam acceleration by a FFAG accelerator has been proposed. Development of the method using the FFAG accelerator in Kyushu University has been carried out. To ensure large acceptance of the FFAG, magnetic field correction coil of pole surface type has been designed and its prototype has been tested. Acceleration of radioactive 16N produced by the d(15N,16N)p reaction using a 15N beam derived from the tandem accelerator is planned to be demonstrated after the completion of the fabrication of pole surface coils for 12 cells of the magnets. The beta-delayed alpha spectrum from 16N reliable enough for the determination of the astrophysical nuclear reaction rate of 12C+α is expected to be obtained by the realization of high-purity 16N beam applying the proposed method.

Free Research Field

応用原子核物理学、加速器科学