About
The second part of the lecture focuses on the principles, technical implementation, and application of Beam Position Monitors (BPMs). The expected signal shape is derived and illustrated for a representative use case, providing guidance for proper interpretation and application. BPMs enable the evaluation of the transverse position of beam bunches with time resolutions ranging from individual bunch-by-bunch measurements to millisecond-scale averages. In synchrotron applications, the closed orbit -measured on the millisecond timescale- is determined and utilized as input for feedback systems to mitigate external disturbances and power supply fluctuations. By interpreting the bunch position as representative of a "macro-particle," key beam parameters such as tune, beta function, dispersion, and chromaticity can be extracted. For high-current operation, spectral modifications due to tune shifts and tune spread are briefly addressed. The lecture concludes with a concise overview of bunch length measurement techniques and the role of Beam Loss Monitors (BLMs) in machine protection and diagnostics.
00:00:00 Slide 1
00:00:12 Slide 2
00:01:40 Slide 3
00:02:17 Slide 4
00:02:59 Slide 5
00:04:04 Slide 6
00:04:46 Slide 7
00:05:37 Slide 8
00:06:26 Slide 9
00:07:04 Slide 10
00:08:35 Slide 11
The talk
Credits and licence
- Institution
- CERN
- Department
- CAS - CERN Accelerator School
- Speaker
- Peter Forck
- Year
- 2025
- Level
- Graduate
- Language
- English
- Source
- CERN
- Licence
- CERN, as CERN states it. CERN's terms
- Attribution
- © CERN. CERN provides its audiovisual media free of charge for educational and informational use, credited to CERN; this lecture is shown in CERN's own player.
- Who can watch
- CERN gives no rating. Invisible Network shows it to Teens profiles and older, judged from what the source says about it. How courses are placed