Paper | Title | Page |
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PM05 | Functionality Enhancement of the Multiplexing BPM System in the Storage of SRRC | 171 |
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An extension of existing multiplex BPM electronics to provide capability for turn-by-turn beam position and phase advance measurement is implemented. The system can be configured as turn-by-turn beam position measurement or phase advance and coupling measurement. For turn-by-turn mode, the system performed four consecutive measurements of four BPM buttons. Data acquisition is synchronize with beam excitation. Turn-by-turn beam position is reconstructed by these four independent measurements. This system was named as pseudo-turn-by-turn beam position monitor system (PTTBPM). Resonance excitation of the stored beam and adopting lock-in techniques can measure betatron phase and local coupling. Design considerations of the system and preliminary beam test results are presented in this report. |