Measurement of Injection Orbit using a Single Pass BPM System at the PF Ring
Abstract
A single-pass beam-position monitor system to measure the injection-beam positions in the storage ring was developed. The purpose of this system is the correction of the injection orbit error in advance of the beam storage during the commissioning period after the large reconstruction of the PF ring to install a lower emittance lattice. The signal processing method was reported previously. Bipolar bunch signals extracted through button electrodes were recorded in real time using a high-speed waveform digitizer, and the beam positions were determined from the ratio of the four-button signals. For the single-pass measurement, 16 BPMs were selected and the signals from the BPMs were processed at the same time using RF power combiners and two 4-channel waveform digitizers. The injection orbit during the 1st turn to the 4th turn could be measured by one injection pulse. The resolution of the measurement was estimated at about 0.2 mm for the typical electron pulse of 0.2 nC with 2 ns duration. Some results of the injection-orbit correction based on this measurement will be reported.
- Publication:
-
APS Meeting Abstracts
- Pub Date:
- May 1997
- Bibcode:
- 1997APS..PAC..9P75H