2024/06/21 by C. Y. Tan, Tan, C. Y., M. Balcewicz +1 · 1 citation
Engineering · #Accelerator Physics (physics.acc-ph) #Electromagnetic Compatibility and Measurements #FOS: Physical sciences #Particle Accelerators and Free-Electron Lasers #Particle accelerators and beam dynamics
paper · pdf · doi:10.48550/arxiv.2406.15238
openalex publication_date 2024/06/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The measurement of beam emittances by extracting the quadrupole mode signal\nfrom a 4 plate beam position monitor (BPM) was published at least 40 years ago.\nUnfortunately, in practice, this method suffers from poor signal to noise ratio\nand requires a lot of tuning to extract out the emittances. In this paper, an\nimproved method where multiple BPMs are used together with better mathematical\nanalysis is described. The BPM derived emittances are then compared with those\nmeasured by the Ion Profile Monitor (IPM). Surprisingly, the BPM measured\nemittances behave very well and are more realistic than those measured by the\nIPM.\n