Characterisation of HEXITECMHz - A 1 MHz continuous frame rate spectroscopic X-ray imaging detector system

DOI: 10.1016/j.nima.2023.168718

Authors: B. D. Cline (UKRI STFC Rutherford Appleton Laboratory) , D. Banks (UKRI STFC Rutherford Appleton Laboratory) , S. Bell (UKRI STFC Rutherford Appleton Laboratory) , I. Church (UKRI STFC Rutherford Appleton Laboratory) , S. Cross (UKRI STFC Rutherford Appleton Laboratory) , A. Davis (UKRI STFC Rutherford Appleton Laboratory) , C. Day (UKRI STFC Rutherford Appleton Laboratory) , M. French (UKRI STFC Rutherford Appleton Laboratory) , T. Gardiner (UKRI STFC Rutherford Appleton Laboratory) , N. Ghorbanian (UKRI STFC Rutherford Appleton Laboratory) , J. Harris (UKRI STFC Rutherford Appleton Laboratory) , M. Hart (UKRI STFC Rutherford Appleton Laboratory) , J. Holden (UKRI STFC Rutherford Appleton Laboratory) , J. Lipp (UKRI STFC Rutherford Appleton Laboratory) , T. Nicholls (UKRI STFC Rutherford Appleton Laboratory) , J. Nobes (UKRI STFC Rutherford Appleton Laboratory) , S. Pradeep , M. Prydderch (UKRI STFC Rutherford Appleton Laboratory) , M. Roberts (UKRI STFC Rutherford Appleton Laboratory) , A. Schneider (UKRI STFC Rutherford Appleton Laboratory) , P. Seller (UKRI STFC Rutherford Appleton Laboratory) , D. Sole (UKRI STFC Rutherford Appleton Laboratory) , M. C. Veale (UKRI STFC Rutherford Appleton Laboratory) , M. D. Wilson (UKRI STFC Rutherford Appleton Laboratory) , W. Helsby (UKRI STFC Daresbury Laboratory) , V. Dhamgaye (Diamond Light Source) , O. Fox (Diamond Light Source) , K. Sawhney (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Nuclear Instruments And Methods In Physics Research Section A: Accelerators, Spectrometers, Detectors And Associated Equipment

State: Published (Approved)
Published: September 2023
Diamond Proposal Number(s): 32772

Abstract: Spectroscopic X-ray imaging techniques including Compton X-ray Imaging, X-ray Fluorescence Imaging and Hyperspectral X-ray Tomography require energy-resolving detectors capable of operating at high incident X-ray fluxes to make time resolved measurements. HEXITECMHz, operates at a continuous 1 MHz frame rate and can make fully spectroscopic measurements at >106 ph s−1 mm−2. This is enabled by an integrating Front End, in-pixel digitisation and high-speed serialisers. A 300 μm thick p-type Si HEXITECMHz detector was characterised on the B16 Test Beamline at the Diamond Light Source and are the first measurements taken at a 1 MHz frame rate. At 10 keV and 15 keV) the device displayed average FWHM of 656 eV and 682 eV respectively, with minimal changes in spectroscopic performance over ∼8 h. Analysis of charge-sharing events show low charge loss and a linear energy-signal response. Higher-flux measurements illustrated the capability of the ASIC to operate as a photon-counting device.

Journal Keywords: Pixel detector; MHz imaging; P-type Si; Resolution; X-ray spectroscopy; X-ray imaging

Subject Areas: Physics, Engineering


Instruments: B16-Test Beamline

Added On: 27/09/2023 08:30

Discipline Tags:

Detectors Physics Engineering & Technology

Technical Tags:

Diffraction