Search for spin polarization of a relativistic electron beam for improving the beam lifetime in storage ring

2016 Fiscal Year Final Research Report

• Project/Area Number: 26400305
• 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: SAGA Light Source, Kyushu Synchrotron Light Research Center
• Principal Investigator: Kaneyasu Tatsuo 公益財団法人佐賀県地域産業支援センター九州シンクロトロン光研究センター, 加速器グループ, 副主任研究員 (90413997)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 電子蓄積リング / 放射偏極 / ビーム寿命 / レーザーコンプトン散乱

Outline of Final Research Achievements

We have studied the radiative spin polarization of the 1.4 GeV electron beam and its effect to the beam lifetime in the SAGA Light Source storage ring. As a first step of the experimental investigation, we verified resonant spin depolarization of the stored beam. Sudden changes of the beam lifetime and beam loss rates due to the depolarization were observed. Furthermore we have developed a Compton-scattering polarimeter for studying the variation of beam lifetime due to the spin polarization of the electron beam.

Free Research Field

電子加速器，原子分子物理