Speaker
Description
Korea-4GSR, a 4th generation synchrotron radiation facility under construction in Ochang, South Korea, will install ten beamlines in Phase-1, nine of which will use undulators as light sources. The central cone entering each beamline’s optics has a beam size about 1/10 that of the full white beam, requiring precise shaping and diagnostics at the front-end. The white beam from IVU24(In-Vacuum Undulator) reaches up to 18 kW power with a peak power density of 165 kW/mrad². Such high thermal loads can cause damage or vacuum failure with slight misalignments. Therefore, diagnostics must endure this load and provide accurate measurements. The diagnostic system must offer sub-100 µm resolution to detect beam size and position, while also managing heat. For this, scCVD(single crystalline Chemical Vapor Deposition) diamond is used to detect current signals and X-ray fluorescence, supported by a low-conductive water cooling channel. This presentation introduces the white beam monitoring system for Korea-4GSR undulator beamlines, including mechanical design, cooling system, and thermal analysis.
