Ion and electron Imaging

Applications of TPX3Cam include spatial and velocity map imaging of ions in time-of-flight mass spectroscopy; coincidence imaging of ions and electrons, and other time-resolved types of imaging spectroscopy. TPX3Cam is able to detect and time-stamp ion hits with 1.6 ns timing resolution, thus making it possible to record ion momentum images for all fragment ions simultaneously and avoiding the need to gate the detector on a single fragment.

VMI with Timepix3 TPX3Cam
Image above: TPX3Cam is able to simultaneously image and time-stamp light flashes of more than 1000 photons with high quantum efficiency in the 400 to 1000 nm wavelength range. It can efficiently register ions impinging on an MCP (micro-channel plate) in the VMI (velocity map imaging) configuration. The MCP is coupled to a fast P47 phosphor, which produces light flashes in response to ions hitting the MCP. The TPX3Cam, placed outside of the vacuum, can detect light flashes from the phosphor.
Adapted from Zhao et. al, Review of Scientific Instruments 88, 113104 (2017)

Table ion TOF mass spectrum
The image on the left shows ion TOF mass spectrum of CH2IBr recorded with TimepixCam, a previous model of the TPX3Cam, at the FLASH light source at the German Synchrotron, Hamburg after strong-field ionization with an intense laser pulse along with the camera images for each of the peaks in the TOF spectrum.

Adapted from M.Fisher-Levine et al, J. Synchrotron Rad. (2018) 25, 336-345.