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| 024 | 7 | _ | |a 10.1103/31gl-qyk7 |2 doi |
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| 100 | 1 | _ | |a Trebushinin, Andrei |0 P:(DE-H253)PIP1084640 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Noninterferometric method for transverse electron beam size diagnostic with synchrotron radiation at a free-electron laser |
| 260 | _ | _ | |a College Park, MD |c 2025 |b American Physical Society |
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| 520 | _ | _ | |a We present a noninterferometric method for measuring the transverse electron beam size at the European XFEL based on synchrotron radiation intensity autocorrelation. The technique enables cell-by-cell diagnostics along the SASE1 undulator using existing hardware: a commissioning monochromator and a spatial x-ray detector. We extend the results of [A. Trebushinin et al., companion paper, First observation of synchrotron radiation spikes for transverse electron beam size measurements at a free-electron laser, Phys. Rev. Lett. 135, 215001 (2025).] focusing on data analysis procedures and technical implementation. Our method allows for extraction of the beam size from noisy measured intensity distributions with a signal-to-noise ratio as low as 0.9 and is capable of distinguishing between the projected and slice sizes. To validate our approach, we introduced a mismatch in the magnetic lattice, inducing a controlled sinusoidal variation in the beam size along the undulator. The corresponding modulation was clearly reproduced in the electron beam size values extracted from the autocorrelation measurements. This method offers a practical solution for transverse electron beam size diagnostics in high-energy linacs, with direct application to the operation and tuning of free-electron laser facilities. |
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| 700 | 1 | _ | |a Serkez, Svitozar |0 P:(DE-H253)PIP1012664 |b 1 |
| 700 | 1 | _ | |a Freund, Wolfgang |0 P:(DE-H253)PIP1011921 |b 2 |
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| 700 | 1 | _ | |a Koch, Andreas |0 P:(DE-H253)PIP1014602 |b 4 |
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| 773 | _ | _ | |a 10.1103/31gl-qyk7 |g Vol. 28, no. 11, p. 112801 |0 PERI:(DE-600)2844143-6 |n 11 |p 112801 |t Physical review accelerators and beams |v 28 |y 2025 |x 2469-9888 |
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