Speaker
Description
The Swiss Light Source is nearing the completion of its upgrade to a fourth-generation synchrotron, significantly enhancing its brilliance. This leads to a higher photon flux, while improving the coherence of the beam across the entire energy spectrum, from extreme ultraviolet to 80 keV hard X-rays.
To support the increased photon rates, we are developing the MATTERHORN detector, a single-photon counting pixel detector with a 75 µm pitch. It features faster shaping and utilizes multiple comparators and counters to achieve a count rate of up to 20 MHz per pixel with 90% efficiency. The novel digital readout architecture allows for a frame rate of up to 10 kHz with a single counter per pixel in 16-bit mode.
This fast readout technology can also be combined with on-chip digitization in our charge-integrating detectors, enabling the handling of extreme photon rates using dynamic gain switching. The planned upgrade of JUNGFRAU will allow to reach up to 100 million photons per pixel per second at a 10 kHz frame rate.
Additionally, we are developing a 1 Megapixel MÖNCH detector with a 25 µm pitch, offering noise levels below 20 e- rms ENC and 2 kHz frame rate. This will improve performance in photon-starved applications like Resonant Inelastic X-ray Scattering (RIXS) and fluorescence emission imaging, where higher brilliance enables greater sensitivity.
To extend the energy range of our detectors, we are improving sensor technologies beyond standard silicon.
For hard X-rays, we are testing and characterizing high-Z sensors, primarily GaAs and CdZnTe, to build large-area single-photon counting detectors for hard X-ray diffraction.
For soft X-rays below 2 keV, we collaborate with FBK to develop LGAD sensors optimized for soft X-ray detection, enabling single-photon counting down to 500 eV for the first time. The possibility of interpolating using LGAD sensors allows a resolution of approximately 1um and opens the possibility to develop a new hybrid detector technology for RIXS.
These advancements will significantly contribute to the experiments at SLS2.0, paving the way for exciting new scientific discoveries.
| Workshop topics | Detector systems |
|---|
