ANL, Lemont, Illinois, USA
To measure the swap-out injection/extraction bunches of the Advanced Photon Source Upgrade (APS-U) storage ring, single-pass Beam Position Monitor (BPM) electronics will be installed in the first sectors after the injection with fast RF switches. The fast RF switch will select a bunch signal to be processed by the single pass BPM electronics, and have the remaining bunches processed by the regular BPM electronics. In addition to measuring the swap-out bunch during injection, the setup will be able to carry out various other measurements of any selected single bunch (or bunches). This paper presents the performance of the fast RF switches and related electronics.
ANL, Lemont, Illinois, USA
A Hydrostatic Leveling System (HLS) has been designed for the Advanced Photon Source Upgrade (APS-U) storage ring (SR) to characterize the relative floor motion along each Insertion Device Front End (IDFE) and the global floor motion of the SR tunnel. 3 HLS sensors will be installed alongside each IDFE. Two sensors will be mounted near the ID Beam Position Monitors (BPMs), which are located at either end of the ID. The 3rd HLS sensor will be mounted near the Grazing-Incidence Insertion Device X-Ray BPM (GRID xBPM), about 20 meters away from the source point. In addition, there will be 1 sensor installed in each of the 5 sectors in Zone-F where there are no ID beamlines. The HLS water network along each of the 35 IDFEs and 5 sectors in Zone-F are connected via valves to form a global network around the 1.1 km SR tunnel. The HLS will measure the vertical floor displacement at a total of 110 locations. Combined with the highly stable BPM/xBPM stands, the HLS can better characterize the electron and photon beam long-term stability. The HLS design is based on a two-pipe system for easy installation in tight spaces. In this paper, we present the design of the HLS system and preliminary performance of the first article units.
ANL, Lemont, Illinois, USA
With swap-out injection and a third-harmonic bunch lengthening cavity, time domain diagnostics will be beneficial tools in for optimisation of the Advanced Photon Source Upgrade electron storage ring. In the present work, we present plans for time-domain X-ray and visible photon diagnostics for the Advanced Photon Source Upgrade. Particular emphasis is given to implementation of visible light streak cameras and X-ray bunch purity monitors as time domain photon diagnostics.