High-brightness beam diagnostics for the APS linac

Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366) Pub Date : 1999-04-20 DOI:10.1109/PAC.1999.794397

A. Lumpkin, B. Yang, W. Berg, J. Lewellen, S. Milton

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引用次数: 1

Abstract

The Advanced Photon Source (APS) injector includes an S-band linac with the capability to accelerate beams to 650 MeV. The linac has recently been upgraded with the installation of an RF thermionic gun in addition to the standard DC thermionic gun. The RF gun is predicted to have lower emittance (5 /spl pi/ mm mrad) and may be used to support the APS self-amplified spontaneous emission (SASE) experiments. The critical characterization of this gun's beam has begun with a beam diagnostics station at the end of the linac that can address beam transverse size, emittance, and bunch length (peak current). This station uses both an optical transition radiation (OTR) screen at 45/spl deg/ to the beam direction and a Ce-doped YAG single crystal normal to the beam with a 45/spl deg/ mirror behind it. The visible light images are detected by a Vicon CCD camera and a Hamamatsu C5680 synchroscan streak camera. Spatial resolution of about 30 /spl mu/m (/spl sigma/) and temporal resolution of 1 ps (/spl sigma/) have been demonstrated. Examples of RF gun beam characterization at 220 MeV are reported.

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APS直线机的高亮度光束诊断

先进光子源(APS)注入器包括一个s波段直线加速器，能够将光束加速到650 MeV。直线加速器最近进行了升级，除了标准的直流热离子枪外，还安装了射频热离子枪。预测射频枪具有较低的发射度(5 /spl pi/ mm mrad)，可用于支持APS自放大自发发射(SASE)实验。该射孔枪光束的关键特性已经从直线装置末端的光束诊断站开始，该诊断站可以测量光束的横向尺寸、发射度和束长(峰值电流)。该站使用一个与光束方向45/spl度的光跃迁辐射(OTR)屏和一个与光束垂直的掺ce YAG单晶，其后面有一个45/spl度的反射镜。可见光图像由Vicon CCD相机和Hamamatsu C5680同步扫描条纹相机检测。空间分辨率约为30 /spl mu/m (/spl sigma/)，时间分辨率约为1 ps (/spl sigma/)。本文报道了220兆电子伏特下射频炮束表征的实例。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)

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