| Paper | Title | Page |
|---|---|---|
| RPAT090 | The Study of New Signal Processing Technique in Photon Beam Position Monitors | 4239 |
|
||
|
A log-ratio signal processing technique in photon beam position monitors (PBPM) was presented in this paper. The main performances (e.g. sensitivity, position offset and linearity range) of split PBPM and a pair of wires PBPM were analyzed , and the result of the measurement fit well with the theory. An inexpensive logarithmic amplifier chip which can measure photon currents from 0.1nA to 3.5mA was used in electronic circuits. The logarithmic ratio of the signal amplitudes from the PBPM provides a real-time analog signal that has wider linearity range and higher bandwidth than signal processing technique.
Supported by Natural Science Foundation of China (10275062) and CAS Knowledge Innovation Project (KY4206). |