公开(公告)号：US20230053017A1

公开(公告)日：2023-02-16

申请号：US17794326

申请日：2021-01-19

Applicant: Paul Scherrer Institut

Inventor： Anna Bergamaschi ,  Bernd Schmitt ,  Roberto Dinapoli

IPC: G01J1/44 ,  H04N5/3745

Abstract: A system counts photon interactions in an array of photosensitive diodes and addresses the issue of improving position resolution. Every photo-detector diode of the array is connected to a readout unit cell containing a high-gain charge-to-voltage amplifier, a shaper, at least two comparators with independent thresholds and at least one interpixel communication logic, receiving as input signals from comparator outputs of the same readout unit cell and of the neighboring readout unit cells. This logic is then connected to at least one counter, each counter followed by a counter readout. By means of the digital interpixel communication logic and the set of comparators with different thresholds in every readout unit cell, it is possible to determine the photon hit position in the detector with a higher position resolution than the physical photo-detector size including the removal of the corner effect in pixel detectors.

公开(公告)号：US11933923B2

公开(公告)日：2024-03-19

申请号：US17767136

申请日：2020-09-28

Applicant: Paul Scherrer Institut

Inventor： Gemma Tinti ,  Xintian Shi ,  Roberto Dinapoli ,  Bernd Schmitt ,  Aldo Mozzanica

IPC: G01T1/17 ,  G01T1/24

CPC classification number: G01T1/17 ,  G01T1/247

Abstract: A detector system which can be switched between single photon counting and charge integrating mode depending on the application, the photon flux and energy. Although the space for electronics in a pixel or strip detector system is very limited (as each channel is limited by the pixel size), the reconfiguration of the analog chain and the logic/counter in this smart way yields to have a detector system allowing both modes of operation and, therefore, effectively combining the characteristics of an Eiger® single photon counting system and a Jungfrau® charge integrating pixel detector system into one single detector. Depending on the application, the flux and the photon energy, the operator is enabled to switch between single photon counting and charge integrating mode of operation.

公开(公告)号：US11846543B2

公开(公告)日：2023-12-19

申请号：US17794326

申请日：2021-01-19

Applicant: Paul Scherrer Institut

Inventor： Anna Bergamaschi ,  Bernd Schmitt ,  Roberto Dinapoli

IPC: G01J1/44 ,  H04N25/772

CPC classification number: G01J1/44 ,  H04N25/772 ,  G01J2001/442

Abstract: A system counts photon interactions in an array of photosensitive diodes and addresses the issue of improving position resolution. Every photo-detector diode of the array is connected to a readout unit cell containing a high-gain charge-to-voltage amplifier, a shaper, at least two comparators with independent thresholds and at least one interpixel communication logic, receiving as input signals from comparator outputs of the same readout unit cell and of the neighboring readout unit cells. This logic is then connected to at least one counter, each counter followed by a counter readout. By means of the digital interpixel communication logic and the set of comparators with different thresholds in every readout unit cell, it is possible to determine the photon hit position in the detector with a higher position resolution than the physical photo-detector size including the removal of the corner effect in pixel detectors.

公开(公告)号：US20220373700A1

公开(公告)日：2022-11-24

申请号：US17767136

申请日：2020-09-28

Applicant: Paul Scherrer Institut

Inventor： Gemma Tinti ,  Xintian Shi ,  Roberto Dinapoli ,  Bernd Schmitt ,  Aldo Mozzanica

IPC: G01T1/17 ,  G01T1/24

Abstract: A detector system which can be switched between single photon counting and charge integrating mode depending on the application, the photon flux and energy. Although the space for electronics in a pixel or strip detector system is very limited (as each channel is limited by the pixel size), the reconfiguration of the analog chain and the logic/counter in this smart way yields to have a detector system allowing both modes of operation and, therefore, effectively combining the characteristics of an Eiger® single photon counting system and a Jungfrau® charge integrating pixel detector system into one single detector. Depending on the application, the flux and the photon energy, the operator is enabled to switch between single photon counting and charge integrating mode of operation.

公开(公告)号：US10356342B2

公开(公告)日：2019-07-16

申请号：US15764928

申请日：2016-07-15

Applicant: PAUL SCHERRER INSTITUT

Inventor： Dominic Greiffenberg ,  Aldo Mozzanica ,  Xintian Shi ,  Bernd Schmitt

IPC: H04N5/32 ,  H04N5/378 ,  H04N5/235 ,  H04N5/243 ,  G01T1/29

Abstract: An X ray detector with single photon measurement capabilities includes a layer of photosensitive material and an N×M array of photo-detector diodes in the layer of photosensitive material. The photo-detector diodes have a bias potential interface and a diode output interface. An N×M array of high gain, low noise readout unit cells are assigned to the photo-detector diodes. Each readout unit cell has an input interface connecting the diode output interface to a high-gain charge-to-voltage amplifier with integration capacitors. The high-gain charge-to-voltage amplifier can switch between different gains. A comparator and a digital block monitors the charge of the integration capacitance and switches the gain depending from the monitored charge of the integration capacitance. The pixel detector provides the possibility of in pixel intermediate evaluation of an automatic gain switching circuit state to increase the dynamic range of the detector in case of quasi continuous incoming particle flux.