Performance of a hard X-ray split-and-delay optical system with a wavefront division.
J Synchrotron Radiat
; 25(Pt 1): 20-25, 2018 Jan 01.
Article
en En
| MEDLINE
| ID: mdl-29271746
ABSTRACT
The performance of a hard X-ray split-and-delay optical (SDO) system with a wavefront division scheme was investigated at the hard X-ray free-electron laser facility SACLA. For the wavefront division, beam splitters made of edge-polished perfect Si(220) crystals were employed. We characterized the beam properties of the SDO system, and investigated its capabilities for beam manipulation and diagnostics. First, it was confirmed that shot-to-shot non-invasive diagnostics of pulse energies for both branches in the SDO system was feasible. Second, nearly ideal and identical focal profiles for both branches were obtained with a spot size of â¼1.5â
µm in full width at half-maximum. Third, a spatial overlap of the two focused beams with a sub-µm accuracy was achieved by fine tuning of the SDO system. Finally, a reliable tunability of the delay time between two pulses was confirmed. The time interval was measured with an X-ray streak camera by changing the path length of the variable-delay branch. Errors from the fitted line were evaluated to be as small as ±0.4â
ps over a time range of 60â
ps.
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Bases de datos:
MEDLINE
Idioma:
En
Revista:
J Synchrotron Radiat
Asunto de la revista:
RADIOLOGIA
Año:
2018
Tipo del documento:
Article
País de afiliación:
Japón