A New PLS-II In-Vacuum Undulator and Characterization of Undulator Radiation

TL;DR

This paper reports on the development, installation, and characterization of a new in-vacuum undulator at PLS-II, which produces high-brilliance X-ray radiation up to 21 keV, confirming simulation accuracy and successful operation.

Contribution

Introduction of a new in-vacuum undulator at PLS-II with detailed characterization and validation against simulations, demonstrating its effective performance for generating high-energy X-ray beams.

Findings

Undulator generates X-ray up to ~21 keV using 11th harmonic.

Characterized radiation matches simulation results.

Successfully operating at PLS-II after upgrade.

Abstract

This paper describes the result of overall studies from development to characterization of undulator radiation. After three years of upgrading, PLS-II [1, 2] has been operating successfully since 21st March 2012. During the upgrade, we developed and installed an in-vacuum undulator (IVU) that generates brilliant X-ray beam. The IVU with 3 GeV electron beam generates undulator radiation up to ~ 21 keV using 11th higher harmonic. The characterizations of the undulator radiation at an X-ray beam line in PLS-II agreed well with the simulation. Based on this performance demonstration, the in-vacuum undulator is successfully operating at PLS-II.