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1.
3D energy deposition measurements with the GEMPix detector in a water phantom for hadron therapy / Leidner, J (CERN) ; Ciocca, M ; George, S P ; Mirandola, A ; Murtas, F ; Rimoldi, A ; Silari, M ; Tamborini, A
In this paper we present 3D measurements of the energy deposition by a clinical carbon ion beam in a water phantom. Conventionally, these measurements are performed with an array of ionization chambers and used for quality assurance. [...]
2018 - Published in : JINST 13 (2018) P08009-P08009
2.
Medical Applications of the GEMPix / Leidner, Johannes (CERN) ; Murtas, Fabrizio (CERN ; LNF, Dafne Light) ; Silari, Marco (CERN)
The GEMPix is a small gaseous detector with a highly pixelated readout, consisting of a drift region, three Gas Electron Multipliers (GEMs) for signal amplification, and four Timepix ASICs with 55 µm pixel pitch and a total of 262,144 pixels. A continuous flow of a gas mixture such as Ar:CO2:CF4, Ar:CO2 or propane-based tissue equivalent gas is supplied externally at a rate of 5 L/h. [...]
2021 - 20 p. - Published in : Appl. Sciences 11 (2021) 440 Fulltext: PDF;
3.
Application of the GEMPix Detector in Radiation Protection and Particle Therapy / Leidner, Johannes
The GEMPix is a small gaseous detector with a highly pixelated readout [...]
CERN-THESIS-2019-153 -

Full text
4.
A GEMPix‐based Integrated System for Measurements of 3D Dose Distributions in Water for Carbon Ion Scanning Beam Radiotherapy / Leidner, J (CERN ; RWTH Aachen U.) ; Ciocca, M (Unlisted, IT) ; Mairani, A (HITS, Heidelberg) ; Murtas, F (CERN ; Frascati) ; Silari, M (CERN)
This paper demonstrates the capability of the GEMPix detector to measure the 3D dose distribution of carbon ions in water for a clinical pencil beam reliably. In the future, the detector area will be increased to cover fields of scanned beams. [...]
2020 - Published in : Med. Phys. 47 (2020) mp.14119 Fulltext: PDF;
5.
Energy calibration of the GEMPix in the energy range of 6 keV to 2 MeV / Leidner, J (CERN) ; Murtas, F (CERN ; LNF, Dafne Light) ; Silari, M (CERN)
The GEMPix is a small gaseous detector with a highly pixelated readout, consisting of a drift region, three Gas Electron Multipliers (GEMs) for signal amplification, and four Timepix ASICs with 55 μm pixel pitch and a total of 262,144 pixels (512×512 pixels). A continuous flow of a gas mixture (here propane-based tissue equivalent gas) is supplied externally at a rate of 5 L/h. [...]
2021 - 11 p. - Published in : JINST 16 (2021) P10004 Fulltext: PDF;
6.
Measurements of $^{55}$Fe activity in activated steel samples with GEMPix / Curioni, A (CERN ; Milan Polytechnic) ; Dinar, N (CERN ; Paris U., VI-VII) ; La Torre, F P (CERN) ; Leidner, J (CERN ; RWTH Aachen U.) ; Murtas, F (CERN ; Frascati) ; Puddu, S (CERN) ; Silari, M (CERN)
In this paper we present a novel method, based on the recently developed GEMPix detector, to measure the 55Fe content in samples of metallic material activated during operation of CERN accelerators and experimental facilities. The GEMPix, a gas detector with highly pixelated read-out, has been obtained by coupling a triple Gas Electron Multiplier (GEM) to a quad Timepix ASIC. [...]
2017 - 12 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 849 (2017) 60-71 Elsevier Open Access Article: PDF;
7.
Characterization with X-rays of a Large-Area GEMPix Detector with Optical Readout for QA in Hadron Therapy / Oliveira, Andreia Maia (CERN ; Bern U., LHEP) ; Akkerman, Hylke B (Unlisted, NL) ; Braccini, Saverio (Bern U., LHEP) ; van Breemen, Albert J J M (Unlisted, NL) ; Manzano, Lucia Gallego (CERN ; Lausanne U.) ; Heracleous, Natalie (CERN ; Lausanne U.) ; Katsouras, Ilias (Unlisted, NL ; ASML, Veldhoven) ; Leidner, Johannes (CERN) ; Murtas, Fabrizio (CERN ; Frascati) ; Peeters, Bart (Unlisted, NL) et al.
Quality Assurance (QA) in hadron therapy is crucial to ensure safe and accurate dose delivery to patients. This can be achieved with fast, reliable and high-resolution detectors. [...]
2021 - 20 p. - Published in : Appl. Sciences 11 (2021) 6459 Fulltext: PDF;
8.
A Large Area GEMPix detector for treatment plan verification in hadron therapy / Oliveira, Andreia Maia (CERN ; U. Bern, AEC) ; Akkerman, Hylke B ; Braccini, Saverio (U. Bern, AEC) ; van Breemen, Albert J J M ; Manzano, Lucia Gallego (CERN) ; Heracleous, Natalie (CERN) ; Katsouras, Ilias (ASML, Veldhoven) ; Leidner, Johannes (CERN) ; Murtas, Fabrizio (CERN ; LNF, Dafne Light) ; Peeters, Bart et al.
Quality Assurance in hadron therapy is crucial to ensure a safe and accurate dose delivery to the patients. This requires fast and reliable detectors with high spatial resolution. [...]
2022 - 7 p. - Published in : J. Phys. : Conf. Ser. 2374 (2022) 012177 Fulltext: PDF;
In : International Conference on Technology and Instrumentation in Particle Physics (TIPP 2021), Online, Canada, 24 - 29 May 2021, pp.012177
9.
A vacuum chamber for operation of a GEM-based detector in sealed-mode and at low pressure for LET measurements / Leidner, Johannes (CERN) ; Heracleous, Natalie (CERN) ; Kołodziej, Barbara (CERN ; Jagiellonian U.) ; Murtas, Fabrizio (CERN ; LNF, Dafne Light) ; Scapini, Alessandro (CERN ; Milan, Polytech.) ; Silari, Marco (CERN) ; Thomsen, Frederik (CERN ; Aarhus U. (main))
The GEMTEQ is a gaseous detector with Gas Electron Multipliers for signal amplification and Timepix ASICS as highly pixelated readout. It is based on the GEMPix detector and designed for microdosimetry. [...]
2022 - 11 p.

In : Vienna Conference on Instrumentation, Online, Online, 21 - 25 Feb 2022, pp.167365
10.
EARLY-CAREER RESEARCHERS IN MEDICAL APPLICATIONS @ CERN – SHORT TALKS
Please check this page for updates. During the seminar, in case of technical issues, we will post information here [...]
2020 - 3437. KT Seminars External link: Event details In : EARLY-CAREER RESEARCHERS IN MEDICAL APPLICATIONS @ CERN – SHORT TALKS

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