We present the development of a new 16-channel SDD-based X-ray detector with a backscattering geometry, called ASCANIO, designed for experiments in synchrotron beamlines.The main objective of this research project, supported by DESY (Germany), is to improve the quality of X-ray Fluorescence Microscopy (XFM) experiments providing a larger throughput of events. The detection module consists of four monolithic SDDs, each with four channels, and a thickness of 1 mm to provide a high absorption efficiency of 65% at 20 keV. ASCANIO is optimised to maximise photon collection by having a solid angle of 1 sr with 8 mm between the sample and the window. To ensure count-rate capabilities higher than 20 Mcps, it implements an innovative tilted SDD geometry that provides a uniform distribution of fluorescence light among channels. The low-noise analog read-out assures good energy resolution of 129 eV with 2 μs peaking time and 175 eV with 32 ns peaking time. The development of ASCANIO will contribute to the enhancement of XFM experiments by making sample analysis more detailed and faster.
Development of a High Count-Rate X-ray Detector with Backscattering Geometry for Synchrotron Applications
Zorzi, N.;
2023-01-01
Abstract
We present the development of a new 16-channel SDD-based X-ray detector with a backscattering geometry, called ASCANIO, designed for experiments in synchrotron beamlines.The main objective of this research project, supported by DESY (Germany), is to improve the quality of X-ray Fluorescence Microscopy (XFM) experiments providing a larger throughput of events. The detection module consists of four monolithic SDDs, each with four channels, and a thickness of 1 mm to provide a high absorption efficiency of 65% at 20 keV. ASCANIO is optimised to maximise photon collection by having a solid angle of 1 sr with 8 mm between the sample and the window. To ensure count-rate capabilities higher than 20 Mcps, it implements an innovative tilted SDD geometry that provides a uniform distribution of fluorescence light among channels. The low-noise analog read-out assures good energy resolution of 129 eV with 2 μs peaking time and 175 eV with 32 ns peaking time. The development of ASCANIO will contribute to the enhancement of XFM experiments by making sample analysis more detailed and faster.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
