The TIMER instrument is purposedly designed to carry out FEL-based extreme ultraviolet transient grating experiments (XTG). Here, two non collinear FEL pulses generate an interference pattern at the sample with a spatial periodicity in the 2-200 nm range. The dynamic response to this nanoscale modulation is monitored via the diffraction of a third, time-delayed pulse. This XTG diffraction signal encodes information on several fundamental processes, ranging from transport phenomena to collective excitations and fast electron dynamics.
The implementation of this experimental scheme in the EUV/soft X-ray range allows probing lattice dynamics in the mesoscopic regime (10's of nm), inaccessible with other instruments.

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First purely EUV, time-resolved TG signal

We measured all-EUV transient gratings with periods down to 28 nm!  

F. Bencivenga et al., Science Advances 5, eaaw5805 (2019)

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Reflection setup

We implemented the new capability of measuring TG signals in reflection! 

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First evidence of EUV FWM

We observed the first purely EUV four-wave-mixing signal! 

L. Foglia et al., Phys. Rev. Lett. 120, 263901 (2018) 

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User Area

Proposal submission
We invite users and collaborators to discuss their proposals with the beamline local contacts well in advance before the submission deadline. This is crucial for a careful assesment of the experiment feasibility and may lead to improvements in the proposed experimental plan. For more information on experiment feasibilty and proposal submission, please vist the user info section.

Next call for proposals deadline:  Spring 2022

Ultima modifica il Martedì, 18 Gennaio 2022 15:29