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Instruments, Volume 7, Issue 2

June 2023 - 5 articles

Cover Story: In radiation instrumentation, there is a desire to reach a sub-10 ps FWHM timing resolution for many applications. One of the key components in a detection chain is a single-photon detector, and in recent years, the first single-photon avalanche diode (SPAD) with a sub-10 ps timing resolution was presented. This paper presents a comparison between comparators and inverters to determine which type of leading-edge discriminator can obtain the best single-photon timing resolution. Six different quenching circuits are tested with SPADs of the same architecture and in the same operation conditions. This paper reports a 6.3 ps FWHM SPTR for a SPAD read out by a comparator and a 6.8 ps FWHM SPTR for an optimized 1 V inverter using a cascode transistor for higher excess voltage. View this paper

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Feature Paper
Article

6 Citations

3,005 Views

20 Pages

Investigating Slit-Collimator-Produced Carbon Ion Minibeams with High-Resolution CMOS Sensors

Lennart Volz,
Claire-Anne Reidel,
Marco Durante,
Yolanda Prezado,
Christoph Schuy,
Uli Weber and
Christian Graeff

Instruments2023, 7(2), 18;https://doi.org/10.3390/instruments7020018

6 June 2023

Particle minibeam therapy has demonstrated the potential for better healthy tissue sparing due to spatial fractionation of the delivered dose. Especially for heavy ions, the spatial fractionation could enhance the already favorable differential biolo...

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Article

1 Citations

4,271 Views

14 Pages

Geant4 Simulation of Muon Absorption in Concrete Layers

David Joffe and
Christian Perez

Instruments2023, 7(2), 17;https://doi.org/10.3390/instruments7020017

31 May 2023

Muography requires a detailed understanding of the absorption of muons in the material situated between the muon source and the detector. A large-statistics (>3 billion event) Geant4 simulation was run to simulate the absorption of muons in differ...

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Article

3 Citations

3,304 Views

15 Pages

Quenching Circuit Discriminator Architecture Impact on a Sub-10 ps FWHM Single-Photon Timing Resolution SPAD

Frédéric Nolet,
Valérie Gauthier,
Samuel Parent,
Frédéric Vachon,
Nicolas Roy,
Nicolas St-Jean,
Serge A. Charlebois and
Jean-François Pratte

Instruments2023, 7(2), 16;https://doi.org/10.3390/instruments7020016

9 April 2023

In the field of radiation instrumentation, there is a desire to reach a sub-10 ps FWHM timing resolution for applications such as time-of-flight positron emission tomography, time-of-flight positron computed tomography and time-resolved calorimetry....

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Article

3,713 Views

14 Pages

Design and Manufacture of a Test Device for Radiosynthesizer Vacuum Pumps

Victor Amador Diaz,
Scott E. Snyder and
Amy L. Vavere

Instruments2023, 7(2), 15;https://doi.org/10.3390/instruments7020015

6 April 2023

Vacuum pump wear is the most prevalent failure mode of the IBA Synthera® automated radiochemistry system. Rebuilding or replacing the pump causes equipment downtime and increases the radiation exposure of the service personnel. We built a dedicat...

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Project Report

1 Citations

2,307 Views

6 Pages

Fast Timing Detectors and Applications in Cosmic Ray Physics and Medical Science

Christophe Royon,
William d’Assignies D.,
Florian Gautier,
Tommaso Isidori,
Nicola Minafra and
Alexander Novikov

Instruments2023, 7(2), 14;https://doi.org/10.3390/instruments7020014

23 March 2023

We use fast silicon detectors and the fast sampling method originally developed for high energy physics for two applications: cosmic ray measurements in collaboration with NASA and dose measurements during flash beam cancer treatment. The cosmic ray...

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