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Title: Continuous bunch-by-bunch spectroscopic investigation of the microbunching instability

Journal Article · · Physical Review Accelerators and Beams
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  1. Karlsruhe Inst. of Technology (KIT) (Germany)
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Electron accelerators and synchrotrons can be operated to provide short emission pulses due to longitudinally compressed or substructured electron bunches. Above a threshold current, the high charge density leads to the microbunching instability and the formation of substructures on the bunch shape. These time-varying substructures on bunches of picoseconds-long duration lead to bursts of coherent synchrotron radiation in the terahertz frequency range. Therefore, the spectral information in this range contains valuable information about the bunch length, shape and substructures. Based on the KAPTURE readout system, a 4-channel single-shot THz spectrometer capable of recording 500 million spectra per second and streaming readout is presented. First measurements of time-resolved spectra are compared to simulation results of the Inovesa Vlasov-Fokker-Planck solver. Finally, the presented results lead to a better understanding of the bursting dynamics especially above the micro-bunching instability threshold.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1490384
Journal Information:
Physical Review Accelerators and Beams, Journal Name: Physical Review Accelerators and Beams Journal Issue: 11 Vol. 21; ISSN 2469-9888; ISSN PRABCJ
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (3)

From self-organization in relativistic electron bunches to coherent synchrotron light: observation using a photonic time-stretch digitizer journal July 2019
From self-organization in relativistic electron bunches to coherent synchrotron light: observation using a photonic time-stretch digitizer text January 2019
From self-organization in relativistic electron bunches to coherent synchrotron light: observation using a photonic time-stretch digitizer text January 2019

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