Vector-based feedback of continuous wave radiofrequency compression cavity for ultrafast electron diffraction
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866913342977736704 |
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| author | Sutter, Thomas Lee, Joshua Kulkarni, Atharva Musumeci, Pietro Kogar, Anshul |
| author_facet | Sutter, Thomas Lee, Joshua Kulkarni, Atharva Musumeci, Pietro Kogar, Anshul |
| contents | The temporal resolution of ultrafast electron diffraction (UED) at weakly relativistic beam energies ($\lesssim$ 100 keV) suffers from space-charge induced electron pulse broadening. We describe the implementation of a radio frequency (RF) cavity operating in the continuous wave regime to compress high repetition rate electron bunches from a 40.4 kV DC photoinjector for ultrafast electron diffraction applications. Active stabilization of the RF amplitude and phase through a feedback loop based on the demodulated in-phase and quadrature components of the RF signal is demonstrated. This scheme yields 144$\pm$19 fs RMS temporal resolution in pump-probe studies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_16400 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Vector-based feedback of continuous wave radiofrequency compression cavity for ultrafast electron diffraction Sutter, Thomas Lee, Joshua Kulkarni, Atharva Musumeci, Pietro Kogar, Anshul Accelerator Physics Other Condensed Matter Instrumentation and Detectors The temporal resolution of ultrafast electron diffraction (UED) at weakly relativistic beam energies ($\lesssim$ 100 keV) suffers from space-charge induced electron pulse broadening. We describe the implementation of a radio frequency (RF) cavity operating in the continuous wave regime to compress high repetition rate electron bunches from a 40.4 kV DC photoinjector for ultrafast electron diffraction applications. Active stabilization of the RF amplitude and phase through a feedback loop based on the demodulated in-phase and quadrature components of the RF signal is demonstrated. This scheme yields 144$\pm$19 fs RMS temporal resolution in pump-probe studies. |
| title | Vector-based feedback of continuous wave radiofrequency compression cavity for ultrafast electron diffraction |
| topic | Accelerator Physics Other Condensed Matter Instrumentation and Detectors |
| url | https://arxiv.org/abs/2311.16400 |