Speaker
Description
The upgrade of Diamond Light Source to the 4th generation storage ring, Diamond-II, introduces significant changes in the white photon beam properties. Upgrades to the existing XBPM hardware are underway to accommodate increased beam power while maintaining high position sensitivity across beamlines. XBPM blade geometries and positions were optimised using Synchrotron Radiation Workshop (SRW) simulations, considering blade damage thresholds, potential shadowing from upstream components, and beam position sensitivity. Further optimisation was performed for APPLE insertion device beamlines to understand the impact variable polarisations will have on the photon beam profile and therefore the XBPM measurements. The upgraded XBPMs have been installed and commissioned on Diamond front ends. To further improve performance, upgrades to the readout electronics are planned. These upgrades are intended to support future integration of photon beam position measurements with the fast orbit feedback infrastructure as well as providing synchronisation with the Electron Beam Position Monitors (EBPMs). This contribution presents the XBPM hardware upgrades, commissioning results, and ongoing developments towards a unified beam position monitoring system for Diamond-II.
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