Gamma Radiation Source Localization for Micro Aerial Vehicles with a Miniature Single-Detector Compton Event Camera

Báča, Tomáš; Stibinger, Petr; Doubravova, Daniela; Tureček, D.; Šolc, J.; Rusňák, J.; Saska, Martin; Jakůbek, J.

doi:10.1109/icuas51884.2021.9476766

Cited by 12 publications

(8 citation statements)

References 29 publications

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“…3) Localization of radiation sources: Ionizing radiation poses an invisible threat to humans and also to the environment. Through our collaboration in project RaDron 19 , we have developed a compact aerial system for systematic radiation surveillance, mapping, and fast proactive localization of radiation [60], [61]. The platform is equipped with a cutting-edge single-detector Compton camera MiniPIX Timepix3 [62], [63], which is rigidly mounted to the MRS UAV as a forward-facing camera, as depicted in Fig.…”

Section: Industrial Collaborationmentioning

confidence: 99%

MRS Modular UAV Hardware Platforms for Supporting Research in Real-World Outdoor and Indoor Environments

Hert,

Baca,

Petracek

et al. 2023

Preprint

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Section: Industrial Collaborationmentioning

confidence: 99%

MRS Modular UAV Hardware Platforms for Supporting Research in Real-World Outdoor and Indoor Environments

Hert,

Baca,

Petracek

et al. 2023

Preprint

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“…Other efforts have relied on multiple passes in an environment to map the radiation field and identify areas likely to have a radiation source [5], [6]. Compton imaging is another technique that can provide a directional response [7], [8]. However, this response is based on individual event analysis, rather than integrating counts as done in this study.…”

Section: A Detector Array Directional Responsementioning

confidence: 99%

A Machine Learning Approach to a Multidetector Array Response Function for Nuclear Search

Fobar

Vanderlip

Koch

et al. 2022

IEEE Trans. Nucl. Sci.

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During nuclear search operations, the localization of radioactive sources can be a time consuming process that requires mapping relative radiation intensity in a large area to determine the position of a source. This paper introduces the use of machine learning, specifically a Temporal Convolutional Network (TCN), to estimate the direction between a detector array and a static 137 Cs source. This application of machine learning provides a directional vector in 4π with a 90% confidence of 5.6 degrees and a 99% confidence within 11.2 degrees. With the use of low-cost NaI(Tl) detectors, the effects of self-shielding within the array creates gamma-ray shadows depending on the orientation to the source. Using the convolved detector array response function, we apply supervised machine learning with a neural network to predict a unit vector that points towards the observed source. The directional vector is expected to reduce search times once implemented in future work.

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“…The detectors’ high-resolution imaging capabilities are applicable to the analysis of paintings and sculptures [ 2 , 3 ] as well as mammography [ 4 ], dental imaging [ 5 ] and CT scans [ 6 ]. Significant applications include X-ray inspection of material joints and faults and the localisation of radiation sources [ 7 , 8 ]. The TPX3 detector, in combination with a suitable converter, can also be used for neutron detection of both D-D and D-T sources.…”

Section: Introductionmentioning

confidence: 99%

Timepix3: Temperature Influence on Radiation Energy Measurement with Si Sensor

Urban

Nentvich

Marek

et al. 2023

Sensors

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The Timepix3 readout ASIC chip is a hybrid pixelated radiation detector, designed at CERN, which contains a 256 px256 px matrix. Each of the 65,536 radiation-sensitive pixels can record an incoming particle, its energy deposition or time of arrival and measure them simultaneously. Sincethe detector is suitable for a wide range of applications from particle physics, national security and medicine to space science, it can be used in a wide range of temperatures. Until now, it has to be calibrated every time to the operating point of the application. This paper studies the possibility of energy measurement with Timepix3 equipped with a 500μm thick silicon sensor and MiniPIX readout interface in the temperatures between 10 °C and 70 °C with only one calibration. The detector has been irradiated by X-ray fluorescence photons in the energy range from 8 keV to 57 keV, and 31 keV to 81 keV photons from the 133Ba radioactive source. A deviation of 5% in apparent energy value may occur for a 10 °C change in temperature from the reference point, but, with the next temperature change, it can reach up to -30%. Moreover, Barium photons with an energy of 81 keV appear as deposited energy of only 55 keV at a detector temperature of 70 °C. An original compensation method that reduces the relative measurement error from -30% to less than 1% is presented in this paper.

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Gamma Radiation Source Localization for Micro Aerial Vehicles with a Miniature Single-Detector Compton Event Camera

Cited by 12 publications

References 29 publications

MRS Modular UAV Hardware Platforms for Supporting Research in Real-World Outdoor and Indoor Environments

MRS Modular UAV Hardware Platforms for Supporting Research in Real-World Outdoor and Indoor Environments

A Machine Learning Approach to a Multidetector Array Response Function for Nuclear Search

Timepix3: Temperature Influence on Radiation Energy Measurement with Si Sensor

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