2021/09/23 by A. Shemyakin, Alexander Shemyakin, Shemyakin, Alexander · 1 citation
Decision Sciences · Physics and Astronomy · #Accelerator Physics (physics.acc-ph) #Atomic and Molecular Physics #FOS: Physical sciences #Ionosphere and magnetosphere dynamics #Scientific Measurement and Uncertainty Evaluation #physics.acc-ph
paper · pdf · doi:10.48550/arxiv.2109.11589
arxiv created 2021/09/23 · openalex publication_date 2021/09/23 · arxiv updated 2021/09/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Optical properties of components in a linac can be reconstructed from analysis of the orbit response matrix, composed from responses of BPMs to changes in currents of dipole correctors. An efficient way to record such response, discussed in this note, is to excite the corrector current with a sine wave and record its Fourier component of the BPM spectrum. Because of a narrow band of the excitation signal, response to multiple correctors can be recorded at the same time without significantly affecting the signal-to-noise ratio. For that, the correctors are oscillated at different frequencies, and the corresponding BPM Fourier components are recorded. In an ion (non-relativistic) linac, similar measurements can be performed for the longitudinal plane as well. Examples of measurements at the PIP2IT test linac are shown.