| Paper | Title | Page |
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TUP26 |
Study on Beam Length Measurement Technique Using Highspeed Oscilloscope | |
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| In order to study the nonlinear beam dynamics in the storage ring, the SSRF BI group developed the software package HOTPCAP, which is used to extract the bunch-by-bunch 3D beam position information from the BPM electrode signal. In order to enhance the function of this software, we studied the beam length extraction method from digitized BPM electrodes signal. By analyzing the signal spectrum distribution for each bunch and each turn and gaussian fitting in frequency domain, bunch length information be extracted. Compared with the traditional longitudinal diagnostic tool streak camera, this method can obtain and store measurement data as long as ten ms while maintaining the time resolution of ps level, which is a powerful diagnostics tool for study of injection transient stage and longitudinal instability. In this paper, the hardware and software architecture of the system and the beam experimental results obtained during the third harmonic cavity commissioning are introduced. | ||
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