DynAMO End-station
30 Oct 2024
Yes
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No

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Photoelectron time-of-flight (TOF) spectrometry and velocity map imaging (VMI) of photoions are two types of experiments used to study ultrafast photochemistry and are independently available on the current Artemis AMO (Atomic, Molecular and Optical) end station. These experiments are frequently used to study the reaction dynamics of small, gas-phase molecules, where only a few photo-induced processes can compete and are easily disentangled. However, as the size of the molecule increases, the number of reaction and fragmentation pathways accessible at a single wavelength also increase, resulting in complex spectra that are difficult to characterise without more rigorous and sophisticated experimental and analytical procedures. In recent years, there has been a need for studying larger and more complex systems by our user community, presenting a challenge that can be meet with the HiLUX upgrade. 

 

To meet this challenge, we are upgrading the AMO end station. The new end station, DYNAMO, can a) fully utilise the capabilities of the new 100 kHz laser system in ways the current system could not, b) provide a new, sophisticated experimental set-up with a dual photoelectron and photoion spectrometer, representing a significant upgrade on our current capabilities, and c) diversify the range of samples which can be probed with a new generation of molecular sources.

 

The enhanced capabilities of DYNAMO can yield more kinematically complete measurements of chemical systems that are more complex than those studied previously at Artemis. They are of interest for research in structural and reaction dynamics, atmospheric photochemistry, and astrochemistry. 


Upgrades to atomic-molecular-optical (AMO) end stations will establish the most state-of-the-art detection capability, with the goals of:

  • Fully exploiting high data rates from the new laser systems;

  • Enabling studies of a broader array of industrially and societally relevant systems;

  • Implementing advanced sample-handling technology in situ

  • Upgrade current HHG and mono systems to handle high average power

  • ​Expand spectroscopic tools to state-of-the-art methods that fully utilize the benefits of the new laser system​

  • Expand the range of target molecules from small gaseous molecules and high vapour liquids to low vapour liquids and solids approaching small polymers and oligomers​

HiLUX DynAMO.jpg

Specifications:

  • ​2x 110-mm delay-line anode detectors​​

  • Laser-desorption tape-drive molecular source​

  • Independent or coincidence photoion/photoelectron spectroscopy​

  • Targets from atomic gases to organometallics​

  • Updated XUV beamline for photon energies spanning 15 – 80 eV​

  • Pump wavelengths 230 nm – 5 um

HiLUX DynAMO2.jpg

Contact: Springate, Emma (STFC,RAL,CLF)