FERMI@Elettra is a new free-electron-laser (FEL) seeded facility, able to generate subpicosecond photon pulses of high intensity in the EUV (extreme ultraviolet) and soft x-ray range (up to 62 eV for the present FEL1 source, extended to ∼ 300 eV with the FEL2 source under commissioning). Here1 we briefly report about layout, initial results and perspectives of the TIMEX endstation, conceived in the framework of a collaboration between the ELETTRA synchrotron and the University of Camerino. The TIMEX end-station is a branch of the EIS beamline, and is specifically designed to exploit the new FEL source for experiments on condensed matter under extreme conditions. The potential for transmission, reflection, scattering, as well as pump-andprobe experiments is briefly discussed taking into account that FEL pulses can heat condensed matter up to the warm dense matter (WDM) regime. The present experimental set-up and some examples of experiments performed during the commissioning stage are presented. The dependence of the x-ray transmission and reflection as a function of the incident fluence (up to 10-20 J/cm2) is compared with calculations. We also report about near- edge x-ray absorption data collected exploiting the full wavelength tunability of the FEL source. Perspectives for pumpprobe experiments using both FEL and optical pulses, presently under development, are also mentioned.
Probing matter under extreme conditions at the free-electron-laser facilities: the TIMEX beamline
DI CICCO, Andrea;HATADA, KEISUKE;GUNNELLA, Roberto;
2013-01-01
Abstract
FERMI@Elettra is a new free-electron-laser (FEL) seeded facility, able to generate subpicosecond photon pulses of high intensity in the EUV (extreme ultraviolet) and soft x-ray range (up to 62 eV for the present FEL1 source, extended to ∼ 300 eV with the FEL2 source under commissioning). Here1 we briefly report about layout, initial results and perspectives of the TIMEX endstation, conceived in the framework of a collaboration between the ELETTRA synchrotron and the University of Camerino. The TIMEX end-station is a branch of the EIS beamline, and is specifically designed to exploit the new FEL source for experiments on condensed matter under extreme conditions. The potential for transmission, reflection, scattering, as well as pump-andprobe experiments is briefly discussed taking into account that FEL pulses can heat condensed matter up to the warm dense matter (WDM) regime. The present experimental set-up and some examples of experiments performed during the commissioning stage are presented. The dependence of the x-ray transmission and reflection as a function of the incident fluence (up to 10-20 J/cm2) is compared with calculations. We also report about near- edge x-ray absorption data collected exploiting the full wavelength tunability of the FEL source. Perspectives for pumpprobe experiments using both FEL and optical pulses, presently under development, are also mentioned.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
