Reconstruction of x-ray free-electron laser pulse duration and energy chirp from spectral intensity fluctuations
Accurate measurements of the x-ray pulse duration produced by x-ray free-electron lasers (XFELs) typically rely on longitudinal electron beam phase space diagnostics, e.g., an x-band transverse deflecting cavity (XTCAV). An alternative group of methods is based on measurements of radiation statistic...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2023-03-01
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| Series: | Physical Review Accelerators and Beams |
| Online Access: | http://doi.org/10.1103/PhysRevAccelBeams.26.030701 |
| _version_ | 1828000226052407296 |
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| author | River R. Robles Aliaksei Halavanau David Cesar Alberto Lutman Gennady Stupakov |
| author_facet | River R. Robles Aliaksei Halavanau David Cesar Alberto Lutman Gennady Stupakov |
| author_sort | River R. Robles |
| collection | DOAJ |
| description | Accurate measurements of the x-ray pulse duration produced by x-ray free-electron lasers (XFELs) typically rely on longitudinal electron beam phase space diagnostics, e.g., an x-band transverse deflecting cavity (XTCAV). An alternative group of methods is based on measurements of radiation statistics and spectral correlations. In this paper, we present a statistical analysis of FEL radiation which extends the previous technique by Lutman et al. [Phys. Rev. ST Accel. Beams 15, 030705 (2012)PRABFM1098-440210.1103/PhysRevSTAB.15.030705], including the electron beam energy chirp in the FEL gain model. In doing so, we show that with measurements of the average spectrum and the spectral intensity correlations, one can reconstruct the x-ray pulse length, e-beam chirp, and corresponding spectrometer resolution. We validate our approach with 1D and 3D simulations before moving to an experimental demonstration in which our method finds results similar to those obtained from XTCAV measurements. |
| first_indexed | 2024-04-10T06:11:47Z |
| format | Article |
| id | doaj.art-675bf5d13e3b404d9e677aa159f1dbfa |
| institution | Directory Open Access Journal |
| issn | 2469-9888 |
| language | English |
| last_indexed | 2024-04-10T06:11:47Z |
| publishDate | 2023-03-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Accelerators and Beams |
| spelling | doaj.art-675bf5d13e3b404d9e677aa159f1dbfa2023-03-02T15:13:26ZengAmerican Physical SocietyPhysical Review Accelerators and Beams2469-98882023-03-0126303070110.1103/PhysRevAccelBeams.26.030701Reconstruction of x-ray free-electron laser pulse duration and energy chirp from spectral intensity fluctuationsRiver R. RoblesAliaksei HalavanauDavid CesarAlberto LutmanGennady StupakovAccurate measurements of the x-ray pulse duration produced by x-ray free-electron lasers (XFELs) typically rely on longitudinal electron beam phase space diagnostics, e.g., an x-band transverse deflecting cavity (XTCAV). An alternative group of methods is based on measurements of radiation statistics and spectral correlations. In this paper, we present a statistical analysis of FEL radiation which extends the previous technique by Lutman et al. [Phys. Rev. ST Accel. Beams 15, 030705 (2012)PRABFM1098-440210.1103/PhysRevSTAB.15.030705], including the electron beam energy chirp in the FEL gain model. In doing so, we show that with measurements of the average spectrum and the spectral intensity correlations, one can reconstruct the x-ray pulse length, e-beam chirp, and corresponding spectrometer resolution. We validate our approach with 1D and 3D simulations before moving to an experimental demonstration in which our method finds results similar to those obtained from XTCAV measurements.http://doi.org/10.1103/PhysRevAccelBeams.26.030701 |
| spellingShingle | River R. Robles Aliaksei Halavanau David Cesar Alberto Lutman Gennady Stupakov Reconstruction of x-ray free-electron laser pulse duration and energy chirp from spectral intensity fluctuations Physical Review Accelerators and Beams |
| title | Reconstruction of x-ray free-electron laser pulse duration and energy chirp from spectral intensity fluctuations |
| title_full | Reconstruction of x-ray free-electron laser pulse duration and energy chirp from spectral intensity fluctuations |
| title_fullStr | Reconstruction of x-ray free-electron laser pulse duration and energy chirp from spectral intensity fluctuations |
| title_full_unstemmed | Reconstruction of x-ray free-electron laser pulse duration and energy chirp from spectral intensity fluctuations |
| title_short | Reconstruction of x-ray free-electron laser pulse duration and energy chirp from spectral intensity fluctuations |
| title_sort | reconstruction of x ray free electron laser pulse duration and energy chirp from spectral intensity fluctuations |
| url | http://doi.org/10.1103/PhysRevAccelBeams.26.030701 |
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