Abstract
Harmonically resonant cavity as a bunch-length monitor
Highlights
In 2012, we described electron bunch-length measurements made using a prototype harmonically resonant cavity installed on a stand-alone research photoinjector [1]
We describe the characterization of an improved harmonically resonant cavity installed at two locations at the Continuous Electron Beam Accelerator Facility (CEBAF) photoinjector
A novel noninvasive bunch-length measurement technique was validated against a traditional invasive RF-deflector cavity technique, and using particle tracking simulations
Summary
In 2012, we described electron bunch-length measurements made using a prototype harmonically resonant cavity installed on a stand-alone research photoinjector [1]. These measurements indicated that an electron bunch train could excite many modes of the harmonically resonant cavity and the superposition of these modes, as detected by a sampling oscilloscope, resembled electron bunch shapes following relatively simple post-processing. We describe the characterization of an improved harmonically resonant cavity installed at two locations at the Continuous Electron Beam Accelerator Facility (CEBAF) photoinjector. Bunch-length measurements made with the harmonically resonant cavity were compared to measurements using an RF-deflecting cavity technique and to predictions from particle tracking simulations. Provided useful information about the relative phasing of interleaved pulse trains
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