Development of beam profile monitors for advanced accelerators using parametric X-ray radiation

2016 Fiscal Year Final Research Report

• Project/Area Number: 26400304
• 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: Takabayashi Yuichi 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 (50450953)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: パラメトリックX線 / 相対論的電子ビーム / 結晶 / ビームモニタ

Outline of Final Research Achievements

Optical transition radiation (OTR) has often been used for beam profile monitoring for electron linacs. Recently, however, it has been found that OTR becomes coherent and thus cannot be used as a profile monitor when the beam bunch is short, for linacs dedicated to X-ray free electron laser operation. To avoid this coherence, shorter wavelength photons are required, and thus we propose to exploit parametric X-ray radiation (PXR).
In this study, the following results were accomplished: (i) We developed a beam profile monitor employing a Fresnel zone plate (FZP) to focus PXR onto an X-ray detector. (ii) We evaluated the contributions of diffracted transition radiation (DTR) and diffracted bremsstrahlung (DB). (iii) PXR angular distributions generated by a diamond crystal were measured using the 255-MeV electron beam at the SAGA-LS linac, which are in good agreement with theory. (iv) We proposed a new beam diagnostic method using DTR for the International Linear Collider.

Free Research Field

加速器物理，放射線物理