NSLS-II X-ray diagnostics development

TL;DR

This paper discusses the development of X-ray diagnostics at NSLS-II for real-time electron beam analysis, utilizing advanced optics and imaging techniques to measure beam parameters with high precision.

Contribution

It introduces a new X-ray diagnostics system employing high-resolution optics and imaging setups for continuous electron beam monitoring at NSLS-II.

Findings

Design of X-ray optics with high numerical aperture

Implementation of imaging setups with different magnifications

Expected capability to measure beam emittance and energy spread

Abstract

NSLS-II x-ray diagnostics will provide continuous online data of electron beam dimensions, which will be used to derive electron beam emittance and energy spread. It will also provide information of electron beam tilt for coupling evaluation. X-ray diagnostics will be based on imaging of bending magnet and three-pole wiggler synchrotron radiation sources. Diagnostics from three-pole wiggler source will be used to derive particles energy spread. Beta and dispersion functions will have to be evaluated for emittance and particles energy spread calculations. Due to small vertical source sizes imaging need to be performed in x-ray energy range. X-ray optics with high numerical aperture, such as compound refractive lens, will be used to achieve required spatial resolution. Optical setups with different magnifications in horizontal and vertical directions fill be employed to deal with large aspect ratio of the source. X-ray diagnostics setup will include x-ray imaging optics, monochromatization, x-ray imaging and recording components.