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Simulation of FEL pulse length calculation with THz streaking method

Having accurate and comprehensive photon diagnostics for the X-ray pulses delivered by free-electron laser (FEL) facilities is of utmost importance. Along with various parameters of the photon beam (such as photon energy, beam intensity, etc.), the pulse length measurements are particularly useful b...

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Autores principales: Gorgisyan, I., Ischebeck, R., Prat, E., Reiche, S., Rivkin, L., Juranić, P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4853869/
https://www.ncbi.nlm.nih.gov/pubmed/27140142
http://dx.doi.org/10.1107/S160057751600285X
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author Gorgisyan, I.
Ischebeck, R.
Prat, E.
Reiche, S.
Rivkin, L.
Juranić, P.
author_facet Gorgisyan, I.
Ischebeck, R.
Prat, E.
Reiche, S.
Rivkin, L.
Juranić, P.
author_sort Gorgisyan, I.
collection PubMed
description Having accurate and comprehensive photon diagnostics for the X-ray pulses delivered by free-electron laser (FEL) facilities is of utmost importance. Along with various parameters of the photon beam (such as photon energy, beam intensity, etc.), the pulse length measurements are particularly useful both for the machine operators to measure the beam parameters and monitor the stability of the machine performance, and for the users carrying out pump–probe experiments at such facilities to better understand their measurement results. One of the most promising pulse length measurement techniques used for photon diagnostics is the THz streak camera which is capable of simultaneously measuring the lengths of the photon pulses and their arrival times with respect to the pump laser. This work presents simulations of a THz streak camera performance. The simulation procedure utilizes FEL pulses with two different photon energies in hard and soft X-ray regions, respectively. It recreates the energy spectra of the photoelectrons produced by the photon pulses and streaks them by a single-cycle THz pulse. Following the pulse-retrieval procedure of the THz streak camera, the lengths were calculated from the streaked spectra. To validate the pulse length calculation procedure, the precision and the accuracy of the method were estimated for streaking configuration corresponding to previously performed experiments. The obtained results show that for the discussed setup the method is capable of measuring FEL pulses with about a femtosecond accuracy and precision.
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spelling pubmed-48538692016-05-06 Simulation of FEL pulse length calculation with THz streaking method Gorgisyan, I. Ischebeck, R. Prat, E. Reiche, S. Rivkin, L. Juranić, P. J Synchrotron Radiat Research Papers Having accurate and comprehensive photon diagnostics for the X-ray pulses delivered by free-electron laser (FEL) facilities is of utmost importance. Along with various parameters of the photon beam (such as photon energy, beam intensity, etc.), the pulse length measurements are particularly useful both for the machine operators to measure the beam parameters and monitor the stability of the machine performance, and for the users carrying out pump–probe experiments at such facilities to better understand their measurement results. One of the most promising pulse length measurement techniques used for photon diagnostics is the THz streak camera which is capable of simultaneously measuring the lengths of the photon pulses and their arrival times with respect to the pump laser. This work presents simulations of a THz streak camera performance. The simulation procedure utilizes FEL pulses with two different photon energies in hard and soft X-ray regions, respectively. It recreates the energy spectra of the photoelectrons produced by the photon pulses and streaks them by a single-cycle THz pulse. Following the pulse-retrieval procedure of the THz streak camera, the lengths were calculated from the streaked spectra. To validate the pulse length calculation procedure, the precision and the accuracy of the method were estimated for streaking configuration corresponding to previously performed experiments. The obtained results show that for the discussed setup the method is capable of measuring FEL pulses with about a femtosecond accuracy and precision. International Union of Crystallography 2016-04-02 /pmc/articles/PMC4853869/ /pubmed/27140142 http://dx.doi.org/10.1107/S160057751600285X Text en © I. Gorgisyan et al. 2016 http://creativecommons.org/licenses/by/2.0/uk/ This is an open-access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
spellingShingle Research Papers
Gorgisyan, I.
Ischebeck, R.
Prat, E.
Reiche, S.
Rivkin, L.
Juranić, P.
Simulation of FEL pulse length calculation with THz streaking method
title Simulation of FEL pulse length calculation with THz streaking method
title_full Simulation of FEL pulse length calculation with THz streaking method
title_fullStr Simulation of FEL pulse length calculation with THz streaking method
title_full_unstemmed Simulation of FEL pulse length calculation with THz streaking method
title_short Simulation of FEL pulse length calculation with THz streaking method
title_sort simulation of fel pulse length calculation with thz streaking method
topic Research Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4853869/
https://www.ncbi.nlm.nih.gov/pubmed/27140142
http://dx.doi.org/10.1107/S160057751600285X
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