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To exploit fully these impressive photon fluxes and high X-ray energies, readout chips must achieve high frame rates and dynamic ranges, while the use of high-\n                    <jats:italic>Z<\/jats:italic>\n                    sensor materials is essential. To address these challenges, the UK's Science and Technology Facilities Council has developed DynamiX, a test structure for a novel two-stage charge cancellation circuit on a 65\u2005nm CMOS process with a dynamic range from single photon(s) per pixel per frame to &gt;9000\u2005photons per pixel per frame (10\n                    <jats:sup>11<\/jats:sup>\n                    \u201310\n                    <jats:sup>12<\/jats:sup>\n                    \u2005photons\u2005s\n                    <jats:sup>\u22121<\/jats:sup>\n                    \u2005mm\n                    <jats:sup>\u22122<\/jats:sup>\n                    ) at 20\u2005keV photon energy. The application-specific integrated circuit has 16 \u00d716 pixels on 110\u2005\u00b5m pitch and is hybridized with 2\u2005mm thick Redlen high-flux cadmium zinc telluride (HF-CdZnTe). Data are read out at 534000\u2005frames per second over a 14\u2005Gbps serialiser and frames are assembled and saved with a custom data acquisition system. Measurements were made on the Diamond Light Source (DLS) B16 Test Beamline using monochromatic X-ray beams of different sizes and energies to evaluate the detector performance. A sub-pixel beam of size \u223c60\u2005\u00b5m \u00d7 \u223c15\u2005\u00b5m was used to probe pixels to measure single photons with a noise performance of \u03c3 = 5.7 \u00b1 0.1\u2005keV. These single photons are used to calibrate the test pulse and pixel cancellation packet sizes. The linearity of the detector response under increasing flux was measured from &lt;1\u2005photon per pixel per frame to \u223c10\n                    <jats:sup>9<\/jats:sup>\n                    \u2005photons\u2005s\n                    <jats:sup>\u22121<\/jats:sup>\n                    \u2005mm\n                    <jats:sup>\u22122<\/jats:sup>\n                    at 20\u2005keV with an r.m.s. linearity of 6.2%. A polychromatic X-ray set was used to reach higher fluxes of \u223c3 \u00d7 10\n                    <jats:sup>10<\/jats:sup>\n                    \u2005photons\u2005s\n                    <jats:sup>\u22121<\/jats:sup>\n                    \u2005mm\n                    <jats:sup>\u22122<\/jats:sup>\n                    (20\u2005keV equivalent), yielding an r.m.s. linearity of 3.2%. Finally, the full sensor area was used to image a rotating slitted disc at 534000\u2005frames per second.\n                  <\/jats:p>","DOI":"10.1107\/s1600577526006375","type":"journal-article","created":{"date-parts":[[2026,7,9]],"date-time":"2026-07-09T15:10:44Z","timestamp":1783609844000},"page":"1392-1405","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":0,"title":["The prototype DynamiX camera system \u2013 a high-frame-rate high-dynamic-range hard X-ray integrating detector for fourth-generation 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