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26 results on '"S. Korolczuk"'

1. First spatially resolved measurements of the D

Author

E, Panontin, D, Rigamonti, M, Nocente, A, Dal Molin, A, Broslawski, T, Craciunescu, G, Croci, N, Cruz, J, Figueiredo, L, Giacomelli, G, Gorini, M, Gosk, G, Kaveney, Ye O, Kazakov, V, Kiptily, S, Korolczuk, G, Marcer, A, Murari, E, Perelli Cippo, M, Salewski, A, Urban, I, Zychor, and M, Tardocchi

Abstract

The Joint European Torus (JET) gamma-ray camera has been recently upgraded with the installation of new gamma-ray detectors, based on LaBr

Published
2021

2. First spatially resolved measurements of the D-3He α -particle source with the upgraded JET gamma-ray camera

Author

M. Gosk, Nuno Cruz, L. Giacomelli, A. Dal Molin, Gabriele Croci, Ye. O. Kazakov, G. Kaveney, A. Urban, Jet Contributors, Mirko Salewski, I. Zychor, G. Marcer, João Figueiredo, Giuseppe Gorini, M. Tardocchi, Massimo Nocente, Teddy Craciunescu, E. Perelli Cippo, S. Korolczuk, D. Rigamonti, A. Broslawski, E. Panontin, Vasily Kiptily, A. Murari, Panontin, E, Rigamonti, D, Nocente, M, Dal Molin, A, Broslawski, A, Craciunescu, T, Croci, G, Cruz, N, Figueiredo, J, Giacomelli, L, Gorini, G, Gosk, M, Kaveney, G, Kazakov, Y, Kiptily, V, Korolczuk, S, Marcer, G, Murari, A, Perelli Cippo, E, Salewski, M, Urban, A, Zychor, I, and Tardocchi, M

Subjects
Ion cyclotron resonance heating, Electromagnetic radiation detector, Plasma diagnostic, Tokamak, Astrophysics::High Energy Astrophysical Phenomena, Joint European Torus, Plasma heating, Gamma ray, Tritium, 01 natural sciences, 010305 fluids & plasmas, Cyclotron resonance, Optics, 0103 physical sciences, Nuclear fusion, Instrumentation, Tomography, Alpha particles, 010302 applied physics, Physics, Energy resolutions, Scintillation crystals, Jet (fluid), Gamma ray measurements, Dynamic range, business.industry, Detector, Gamma rays, Plasma, Alpha particle, Cameras, Deuterium, Spatially resolved, Gamma-ray cameras, business, Gamma ray detector
Abstract

The Joint European Torus (JET) gamma-ray camera has been recently upgraded with the installation of new gamma-ray detectors, based on LaBr3(Ce) scintillation crystals, which add spectroscopic capability to the existing system allowing measurements with good energy resolution (5% at 0.622 MeV), a dynamic range from hundreds of keV up to about 30 MeV, and high counting rate capabilities of MCps. First gamma-ray measurements during the C38 campaign of the JET have been successfully carried out, in particular, in D-3He plasmas from three-ion ion cyclotron resonance heating experiments, where the detection of 16.4 MeV γ-rays from D + 3He → γ + 5Li reactions with the gamma-ray camera upgrade allowed determining the spatial profile of alpha particles born in D + 3He fusion reactions.

Published
2021

3. High rate neutron and gamma ray spectroscopy of magnetic confinement fusion plasmas

Author

G. Kaveney, Marica Rebai, Sean Conroy, A. Urban, Giuseppe Gorini, R. C. Pereira, Ana C. Fernandes, S. Korolczuk, E. Perelli Cippo, Matthias Weiszflog, L. Giacomelli, Jacob Eriksson, A. Dal Molin, E. Panontin, Marco Tardocchi, Sergey Popovichev, I. Zychor, Anders Hjalmarsson, Giovanni Grosso, A. Broslawski, D. Rigamonti, E. Andersson Sundén, Vasily Kiptily, G. Croci, Göran Ericsson, Massimo Nocente, M. Gosk, Andrea Muraro, Tardocchi, M, Giacomelli, L, Gorini, G, Muraro, A, Nocente, M, Rebai, M, Rigamonti, D, Croci, G, Dal Molin, A, Grosso, G, Panontin, E, Cippo, E, Ericsson, G, Conroy, S, Eriksson, J, Hjalmarsson, A, Sundén, E, Weiszflog, ~, Zychor, I, Broslawski, A, Gosk, M, Korolczuk, S, Urban, A, Fernandes, A, Pereira, R, Kaveney, G, Kiptily, V, and Popovichev, S

Subjects
fast neutrons), Neutron Spectroscopy, Materials science, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Nuclear instruments and methods for hot plasma diagnostics, 7. Clean energy, 01 natural sciences, 030218 nuclear medicine & medical imaging, Diamond Detectors, thermal, Nuclear physics, 03 medical and health sciences, 0302 clinical medicine, Neutron generator, 0103 physical sciences, Neutron, Instrumentation, Mathematical Physics, HgI etc), High Rate, 010308 nuclear & particles physics, Gamma ray, Bremsstrahlung, Magnetic confinement fusion, Plasma, Neutron spectroscopy, CZT, Neutron detectors (cold, HPG, Gamma Ray Spectroscopy, Neutron source, Gamma detectors (scintillators
Abstract

An important instrumental development work has been done in the last two decades in the field of neutron and gamma ray spectroscopic measurements of magnetic confinement plasmas. Starting from the present state of the art instrumentation installed at JET, this paper reviews the recent development that has been carried out within the EUROFUSION programme for the forthcoming high power JET D and DT campaign. This development was dedicated to the realization of new compact neutron and gamma-ray spectrometers which combine very high energy resolution (typically better than 5%) and MHz counting rate capabilities allowing for time resolution in the 10 ms time scale. One of the advantages offered by the compact dimensions of these spectrometers is to make possible their use in multiple sight-line camera configurations, such as for future burning plasma reactors (ITER and DEMO). New compact neutron spectrometers based on single crystal diamond detectors have been developed and installed at JET for measurements of the 14 MeV neutron spectrum. Measurements on a portable DT neutron generator have shown that neutron spectroscopy of the accelerated beam ions at unprecedented energy resolution (∼1% at 14 MeV) is possible, which opens up new opportunities for diagnosing DT plasmas. For what concerns gamma ray measurements, the JET gamma ray camera has been recently upgraded with new compact spectrometers based on a LaBr3 scintillator coupled to Silicon Photomultiplier with the dual aim to improve the spectroscopic and rate capabilities of the detectors. The upgrade camera system will reconstruct the spatial gamma ray emissivity from the plasma in the MeV energy range at MHz counting rates and energy resolution in the 2-4% range. This will allow physics studies of gamma rays produced by the interaction of fast ions with impurities in the plasma and bremsstrahlung emission from runaway electrons.

Published
2020
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4. Study of n-γ discrimination by zero-crossing method with SiPM based scintillation detectors

Author

D. Wolski, S. Korolczuk, Marek Moszynski, J. Baszak, P. Schotanus, M. Grodzicka-Kobylka, Lukasz Swiderski, and Tomasz Szczesniak

Subjects
Physics, Nuclear and High Energy Physics, Scintillation, 010308 nuclear & particles physics, business.industry, Detector, Photoelectric effect, Scintillator, 01 natural sciences, Capacitance, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, 0302 clinical medicine, Silicon photomultiplier, 0103 physical sciences, Optoelectronics, Neutron detection, Figure of merit, business, Instrumentation
Abstract

The paper presents a study of n ∕ γ discrimination with 4x4 ch and 8x8 ch Multi Pixel Photon Counter (MPPC) arrays in neutron detectors based on Stilbene and EJ299-33 plastic scintillators. The n ∕ γ discrimination showed an excellent capability of the MPPC arrays, comparable to that observed earlier with the classical PMTs. Particularly, an application of a zero-crossing method of n − γ discrimination prevented deterioration of the discrimination by the slow response of the Silicon Photomultiplier (SiPM, or MPPC interchangeably) array related to its large capacitance. It was confirmed by a good agreement of the Figure of Merit normalized to the number of photoelectrons determined for the MPPC arrays and XP5500 PMT.

Published
2018

5. Characterization of large TSV MPPC arrays (4×4ch and 8×8 ch) in scintillation spectrometry

Author

S. Korolczuk, Marek Moszynski, J. Baszak, Tomasz Szczesniak, M. Kapusta, and M. Grodzicka-Kobylka

Subjects
010302 applied physics, Physics, Nuclear and High Energy Physics, Scintillation, 010308 nuclear & particles physics, business.industry, Resolution (electron density), Scintillator, Photoelectric effect, Noise figure, 01 natural sciences, Lyso, Silicon photomultiplier, Overvoltage, 0103 physical sciences, Optoelectronics, business, Instrumentation
Abstract

The main objective of this work was to characterize the new multi-pixel photon counter (MPPC) arrays with a 12 × 12 mm 2 and a 24 × 24 mm 2 active area, made using through-silicon via (TSV) technology and with trenches introduced between the cells, in gamma-ray spectrometry with five different scintillators: CsI:Tl, NaI:Tl, LSO/LYSO, BGO, and LaBr 3 . The results of the study are compared to those obtained previously with the older sample of the 12 × 12 mm 2 MPPC array made as a monolithic device. TSV MPPC array with the size of 24 × 24 mm 2 is one of the first commercially available SiPM with such a large active area and with the dead space between channels minimized to only 0.2 mm. Moreover, in these devices, Hamamatsu introduced trenches between cells to reduce cross-talk. Hence excess noise factor (ENF) was also reduced from a value of 1.7 to 1.2 in comparison to the “old” monolithic sample (data for the same overvoltage of 1.3V). Whereby for the new MPPCs, the optimum operating voltage is higher by about 0.6V. In consequence, this higher optimal overvoltage means a higher photon detection efficiency (PDE) and number of photoelectrons, and leads to improved energy resolution. Energy resolution measured for the 662keV full energy peak in a 137 Cs γ -source spectrum recorded with 12 × 12 mm 2 TSV MPPC and two CsI:Tl scintillators ( 12 × 12 × 12 mm 3 and 1 × 1 in ) equals to 5.8% and 6.8%, respectively. For the “old” MPPC with the same CsI:Tl scintillators energy resolution is equal to 6.4% and 7.1%, respectively. These improved TSV MPPC arrays can be commercially used for scintillation light readout of “large” crystals with a diameter of 1 × 1 in or 2 × 2 in , suitable for gamma spectrometry in a wide range of applications. The combination of new 8 × 8 ch ( 24 × 24 mm 2 ) TSV MPPC and 2 × 2 in NaI:Tl gives an excellent energy resolution below 8%, despite the incomplete match of the scintillator surface to the active area of MPPC and loss of the part of the light.

Published
2017

6. SWAN - Detection of explosives by means of fast neutron activation analysis

Author

A. Urban, Ł. Kaźmierczak, T. Krakowski, J. Szewiński, M. Szeptycka, Radoslaw Marcinkowski, T. Kozłowski, S. Korolczuk, S. Borsuk, Lukasz Swiderski, J. Iwanowska, Z. Guzik, and M. Gierlik

Subjects
Physics, Nuclear and High Energy Physics, Spectrum analyzer, Explosive material, 010308 nuclear & particles physics, Nuclear engineering, Detector, 01 natural sciences, Particle detector, Neutron temperature, 0103 physical sciences, Neutron, Neutron activation analysis, 010306 general physics, Instrumentation, Neutron activation
Abstract

In this work we report on SWAN, the experimental, portable device for explosives detection. The device was created as part of the EU Structural Funds Project “Accelerators & Detectors” (POIG.01.01.02-14-012/08-00), with the goal to increase beneficiary's expertise and competencies in the field of neutron activation analysis. Previous experiences and budged limitations lead toward a less advanced design based on fast neutron interactions and unsophisticated data analysis with the emphasis on the latest gamma detection and spectrometry solutions. The final device has been designed as a portable, fast neutron activation analyzer, with the software optimized for detection of carbon, nitrogen and oxygen. SWAN's performance in the role of explosives detector is elaborated in this paper. We demonstrate that the unique features offered by neutron activation analysis might not be impressive enough when confronted with practical demands and expectations of a generic homeland security customer.

Published
2016

7. Upgraded gamma-ray diagnostics for DT campaigns at JET

Author

S. Korolczuk, I. Zychor, D. Rigamonti, G. Boltruczyk, Luca Giacomelli, Giuseppe Gorini, Ana C. Fernandes, Vasily Kiptily, A. Urban, Jet Contributors, Marco Tardocchi, Marcin Gosk, Teddy Cracinescu, A. Broslawski, João Figueiredo, R. C. Pereira, Bruno Santos, Massimo Nocente, Zychor, I, Broslawski, A, Korolczuk, S, Urban, A, Boltruczyk, G, Gosk, M, Cracinescu, T, Fernandes, A, Figueiredo, J, Giacomelli, L, Gorini, G, Kiptily, V, Nocente, M, Costa Pereira, R, Rigamonti, D, Santos, B, and Tardocchi, M

Subjects
Photomultiplier, Tokamak, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Photodetector, Scintillator, 01 natural sciences, 010305 fluids & plasmas, law.invention, Optics, law, 0103 physical sciences, General Materials Science, Energy resolution, 010306 general physics, Civil and Structural Engineering, Physics, Jet (fluid), Spectrometer, business.industry, Mechanical Engineering, Detector, Photodetectors, PIN diode, Gamma ray, Gamma-ray spectrometry, Nuclear Energy and Engineering, Scintillators, Physics::Accelerator Physics, High Energy Physics::Experiment, business
Abstract

For the future JET deuterium-tritium (DT) campaigns numerous gamma-ray diagnostics, in particular the JET Gamma-ray Camera (GC) and the JET Gamma-ray Spectrometer (GS), were upgraded in the last few years. The upgrade of GC and GS included replacement of detector modules in order to allow operation at expected high count rate of ∼0.5 Mcps on the scintillator front surface of 506 mm2 for each GC crystal and 7 squared inches for GS as well as to improve energy resolution to equal or better than 5% at gamma-ray energy above 1.1 MeV for both diagnostics. Within the JET4 Enhancements Project, performance of a number of photodetectors including multi-pixel photon counter (MPPC), PIN diode and photomultiplier tube (PMT) connected to scintillators was investigated. Upgraded detector modules are based on fast scintillators with a decay time of about 20 ns, LaBr3:Ce and CeBr3, coupled to MPPC and PMT for GC and GS, respectively. Results on energy resolution obtained with upgraded diagnostics, already installed at JET, are presented and compared to those collected in laboratory conditions.

Published
2019
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8. Detectors for High Count Rate Measurements with a Compensation for MPPC Gain Dependence on Temperature

Author

Dominik Rybka, A. Broslawski, A. Urban, Massimo Nocente, M. Tardocchi, I. Zychor, M. Gosk, G. Boltruczyk, Vasily Kiptily, S. Korolczuk, D. Rigamonti, Lyoussi, A, Urban, A, Brosławski, A, Bołtruczyk, G, Gosk, M, Korolczuk, S, Rybka, D, Kiptily, V, Nocente, M, Rigamonti, D, Tardocchi, M, and Zychor, I

Subjects
Physics, Physics::Instrumentation and Detectors, business.industry, QC1-999, Detector, 01 natural sciences, High count rate, 010305 fluids & plasmas, Compensation (engineering), Optics, Gamma-ray spectroscopy, MPPC, 0103 physical sciences, Gamma spectroscopy, 010306 general physics, business
Published
2018

9. The upgraded JET gamma-ray cameras based on high resolution/high count rate compact spectrometers

Author

R. C. Pereira, M. Gosk, G. Kaveney, A. Urban, Jet Contributors, M. Nocente, S. Korolczuk, A. Broslawski, João Figueiredo, V. Kiptily, A. Murari, Bruno Santos, L. Giacomelli, M. Tardocchi, S. Popovichev, Ana Fernandes, Giuseppe Gorini, D. Rigamonti, I. Zychor, Rigamonti, D, Broslawski, A, Fernandes, A, Figueiredo, J, Giacomelli, L, Gorini, G, Gosk, M, Kaveney, G, Kiptily, V, Korolczuk, S, Murari, A, Nocente, M, Pereira, R, Popovichev, S, Santos, B, Urban, A, Zychor, I, and Tardocchi, M

Subjects
Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Scintillator, 7. Clean energy, 01 natural sciences, 010305 fluids & plasmas, Optics, Physics::Plasma Physics, 0103 physical sciences, Neutron, 010306 general physics, Gamma-ray spectroscopy, magnetically confined plasmas, fast ions, Instrumentation, High count rate gamma-ray spectroscopy, Physics, Jet (fluid), Gamma-ray emission from fusion plasmas, Spectrometer, business.industry, Detector, Gamma ray, High resolution gamma-ray spectroscopy, Compact gamma-ray spectrometers, Runaway electron hard X-ray emission spectroscopy, Tomography reconstruction of gamma-ray emission plasmas, Upgrade, Deuterium, Physics::Accelerator Physics, High Energy Physics::Experiment, business
Abstract

The JET gamma-ray cameras have been recently upgraded within the gamma-ray camera upgrade project in support of development of JET high performance deuterium plasma scenarios and in prepa- ration of deuterium-tritium experiments. New, dedicated detectors based on a LaBr 3 crystal and silicon photo-multipliers have been developed and replaced pre-existing CsI detectors in all 19 channels. The new instrument gives opportunity of making two-dimensional gamma-ray measurements with a count- ing rate capability exceeding 1 MCounts/s (MCps) and energy resolution better than 5% at 1.1 MeV. The upgrade is of relevance for fast ion and runaway electron physics studies in high performance deuterium discharges and also in plasmas with tritium at neutron yields in the range up to about 5 × 10 17 n/s.

Published
2018
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10. New FPGA based hardware implementation for JET gamma-ray camera upgrade

Author

M. Gosk, João Figueiredo, M. Tardocchi, João M. C. Sousa, R. C. Pereira, A. Urban, Jet Contributors, L. Giacomelli, Massimo Nocente, A. Murari, Bruno Gonçalves, Carlos Correia, S. Korolczuk, G. Boltruczyk, P. F. Carvalho, I. Zychor, Vasily Kiptily, Ana Fernandes, Jakub Bielecki, D. Rigamonti, Bruno Santos, R. Dias, A. Broslawski, Fernandes, A, Pereira, R, Santos, B, Bielecki, J, Boltruczyk, G, Broslawski, A, Carvalho, P, Dias, R, Figueiredo, J, Giacomelli, L, Gosk, M, Kiptily, V, Korolczuk, S, Murari, A, Nocente, M, Rigamonti, D, Sousa, J, Tardocchi, M, Urban, A, Zychor, I, Correia, C, and Gonçalves, B

Subjects
Real-time processing, Computer science, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, 01 natural sciences, 010305 fluids & plasmas, law.invention, Data acquisition, Installation, law, 0103 physical sciences, General Materials Science, Gamma-ray spectroscopy, Advanced Telecommunications Computing Architecture, Field-programmable gate array, FPGA, Civil and Structural Engineering, Gamma camera, 010308 nuclear & particles physics, business.industry, Mechanical Engineering, Detector, ATCA, Full Rate, Gamma-ray spectroscopy, Joint European Torus, FPGA, Upgrade, Nuclear Energy and Engineering, Nuclear fusion, business, Computer hardware
Abstract

The Gamma-Ray Camera Upgrade (GCU) project aims at installing a new set of 19 scintillators with multi-pixel photon counter (MPPC) embedded, capable to meet the high fluxes expected during deuterium-tritium plasmas while improving the diagnostic spectroscopic capabilities. GCU will benefit from the Advanced Telecommunications Computing Architecture (ATCA)-based Data Acquisition System (DAQ), successfully installed and commissioned during the JET-EP2 enhancement. However, to cope with the new GCU detector signals, the DAQ Field Programmable Gate Array (FPGA) codes need to be rebuilt. This work presents the FPGA code upgrade for Gamma Camera (GC) DAQ, capable to sustain the expected fast response of new detectors, while exploiting the full capabilities of the DAQ. Dedicated codes were designed, capable to acquire the new signals at full rate, and simultaneously processing them in real-time through suitable algorithms, fitted to the new signals shape. First results of real-time processing codes applied to data from detector prototypes are presented.

Published
2018
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11. Application of the anti-Compton detector in neutron activation analysis techniques

Author

S. Korolczuk, Lukasz Swiderski, Radoslaw Marcinkowski, J. Iwanowska, S. Borsuk, J. Szewiński, Ł. Kaźmierczak, M. Gierlik, T. Krakowski, T. Kozłowski, A. Urban, M. Szeptycka, and Z. Guzik

Subjects
Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, business.industry, Detector, Scintillator, Neutron temperature, Particle detector, Nuclear physics, Optics, Scintillation counter, Neutron detection, High Energy Physics::Experiment, Neutron, Neutron activation analysis, Nuclear Experiment, business, Instrumentation
Abstract

In this work we report about performance of the cylindrical 3 in.×3 in. LaBr 3 scintillation detector assembled with a BGO guard detector. This setup was optimized for the identification of explosive materials by means of fast neutron activation analysis.

Published
2015

12. CeBr3-based detector for gamma-ray spectrometer upgrade at JET

Author

JETR. Kwiatkowski (a, G. Boltruczyk (a, A. Broslawski (a, M. Gosk (a, S. Korolczuk (a, S. Mianowski (a, A. Szyd?owski (a, A. Urban (a, I. Zychor (a, V. Braic (b, R. Costa Pereira (c, T. Craciunescu (b, D. Croft (d, M. Curuia (b, A. Fernandes (c, V. Goloborod'ko (e, G. Gorini (f, V. Kiptily (d, I. Lengar (g, J. Naish (d, R. Naish (d, M. Nocente (f, K. Schoepf (e, B. Santos (c, S. Soare (b, M. Tardocchi (f, V. Yavorskij (e, V.L. Zoita (b, JET contributors1, Kwiatkowski, R, Bołtruczyk, G, Brosławski, A, Gosk, M, Korolczuk, S, Mianowski, S, Szydłowski, A, Urban, A, Zychor, I, Braic, V, Costa Pereira, R, Craciunescu, T, Croft, D, Curuia, M, Fernandes, A, Goloborod'Ko, V, Gorini, G, Kiptily, V, Lengar, I, Naish, J, Naish, R, Nocente, M, Schoepf, K, Santos, B, Soare, S, Tardocchi, M, Yavorskij, V, and Zoita, V

Subjects
Nuclear reaction, Tokamak, Monte carlo simulation, Astrophysics::High Energy Astrophysical Phenomena, Scintillator, 01 natural sciences, 010305 fluids & plasmas, Ion, law.invention, Nuclear physics, Physics::Plasma Physics, law, 0103 physical sciences, General Materials Science, Energy resolution, Nuclear Experiment, Civil and Structural Engineering, Physics, Jet (fluid), Monte carlo simulations, 010308 nuclear & particles physics, Mechanical Engineering, Detector, Gamma ray, Plasma, Gamma-ray spectrometry, Nuclear Energy and Engineering, Scintillators, Voltage divider, Materials Science (all)
Abstract

tOne of the important techniques used at JET for studying fast ions is based on measurements of gamma-rays which are produced as a result of nuclear reactions between ions and plasma impurities. The intenseneutron and gamma-ray fluxes expected during a DT campaign impose new requirements on detectorcharacteristics used in such experiments. In addition to good energy resolution, detectors must also becharacterized by a high signal-to-noise ratio and allow to perform measurements at high counting rateabout 1 Mcps. The scintillators which fulfill these requirements are, among others, LaBr3:Ce, alreadytested at JET, and CeBr3with a scintillation decay time of ~20 ns. We report on measurements whichwere performed with a detector module equipped with a 3" × 3" CeBr3scintillator and with an activevoltage divider AVD@NCBJ, designed and constructed at NCBJ. Standard gamma-ray sources, as well asa PuBe source, were used for measurements. The comparison of measured and Monte Carlo simulatedspectra is also presented.© 2017 Elsevier B.V. All rights reserved

Published
2017
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13. Performance of the prototype LaBr

Author

D, Rigamonti, A, Muraro, M, Nocente, V, Perseo, G, Boltruczyk, A, Fernandes, J, Figueiredo, L, Giacomelli, G, Gorini, M, Gosk, V, Kiptily, S, Korolczuk, S, Mianowski, A, Murari, R C, Pereira, E P, Cippo, I, Zychor, and M, Tardocchi

Abstract

In this work, we describe the solution developed by the gamma ray camera upgrade enhancement project to improve the spectroscopic properties of the existing JET γ-ray camera. Aim of the project is to enable gamma-ray spectroscopy in JET deuterium-tritium plasmas. A dedicated pilot spectrometer based on a LaBr

Published
2016

14. Gamma-ray spectroscopy at MHz counting rates with a compact LaBr

Author

M, Nocente, D, Rigamonti, V, Perseo, M, Tardocchi, G, Boltruczyk, A, Broslawski, A, Cremona, G, Croci, M, Gosk, V, Kiptily, S, Korolczuk, M, Mazzocco, A, Muraro, E, Strano, I, Zychor, and G, Gorini

Abstract

Gamma-ray spectroscopy measurements at MHz counting rates have been carried out, for the first time, with a compact spectrometer based on a LaBr

Published
2016

16. High performance detectors for upgraded gamma ray diagnostics for JET DT campaigns

Author

G. Boltruczyk, Bruno Santos, J. Iwanowska-Hanke, S. Soare, Marek Szawlowski, P. Sibczynski, M. Tardocchi, V. G. Kiptily, S. Mianowski, M. Gosk, A. Burakowska, Lukasz Swiderski, Vasile Zoita, M. Gierlik, Agnieszka Syntfeld-Kazuch, A. Murari, Massimo Nocente, L. Giacomelli, M Grodzicka, J. Rzadkiewicz, Tomasz Szczesniak, Giuseppe Gorini, S. Korolczuk, A. Urban, João Figueiredo, Jet Contributors, Ana Fernandes, Marek Moszynski, Adam Szydlowski, Teddy Craciunescu, D. Rigamonti, G. Kaveney, R. C. Pereira, I. Zychor, Roch Kwiatkowski, J. Szewiński, V. Perseo, Zychor, I, Boltruczyk, G, Burakowska, A, Craciunescu, T, Fernandes, A, Figueiredo, J, Giacomelli, L, Gorini, G, Gierlik, M, Gosk, M, Grodzicka, M, Iwanowska Hanke, J, Kaveney, G, Kiptily, V, Korolczuk, S, Kwiatkowski, R, Mianowski, S, Moszynski, M, Murari, A, Nocente, M, Pereira, R, Perseo, V, Rigamonti, D, Rzadkiewicz, J, Sibczynski, P, Santos, B, Soare, S, Syntfeld Kazuch, A, Swiderski, L, Szawlowski, M, Szczesniak, T, Szewinski, J, Szydlowski, A, Tardocchi, M, Urban, A, and Zoita, V

Subjects
Atomic and Molecular Physics, and Optic, gamma-ray spectrometry, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Population, energy resolution, Photodetector, scintillators, Condensed Matter Physic, Scintillator, 01 natural sciences, 7. Clean energy, 010305 fluids & plasmas, Nuclear physics, decay time, detection efficiency, 0103 physical sciences, Neutron, education, tokamak, Mathematical Physics, Physics, education.field_of_study, Jet (fluid), 010308 nuclear & particles physics, Detector, Gamma ray, Response time, MPPC, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, scintillator
Abstract

In forthcoming deuterium-tritium (DT) experiments on JET a significant population of alpha-particles will be produced. For operating alpha-particle diagnostics at high DT neutron fluxes, specific improvements have to be made. Proposed new detectors for gamma-ray measurements will be based on CeBr3 and LaBr3:Ce scintillators. They are characterized by a good energy resolution, a relatively high detection efficiency for a few MeV gamma-rays and a fast response time. An overview of scintillator parameters is presented. A description of the properties of photodetectors is given to indicate optimal setups. Results of measurements, using gamma-ray sources with energies up to a few MeV, are discussed with relation to the DT campaign requirements.

Published
2016
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17. Digital approach to high rate gamma-ray spectrometry

Author

L. Swiderski, I. Zychor, P. Sibczynski, J. Szewiński, S. Mianowski, J. Rzadkiewicz, and S. Korolczuk

Subjects
High rate, Materials science, business.industry, Electrical engineering, Integrated circuit, Mass spectrometry, law.invention, law, Scintillation counter, Optoelectronics, Gamma spectroscopy, business, Field-programmable gate array, Gamma ray spectrometry
Abstract

Basic concepts and preliminary results of creating high rate digital spectrometry system using efficient ADCs and latest FPGA are presented as well as a comparison with commercially available devices.

Published
2015

18. Characterization of TSV MPPC arrays (4×4 ch and 8×8 ch) in scintillation spectrometry

Author

Marek Moszynski, M. Kapusta, Tomasz Szczesniak, S. Korolczuk, M. Grodzicka, and J. Baszak

Subjects
Physics, Scintillation, business.industry, Detector, Scintillator, Noise figure, Lyso, law.invention, Optics, Silicon photomultiplier, law, Breakdown voltage, Resistor, business
Abstract

The main aim of this work was characterization of the newest MPPC arrays (with 12×12mm and 24×24mm active area) made using through silicon via (TSV) technology in gamma-ray spectrometry with five different scintillators: CsI:Tl, NaI:Tl, LSO/LYSO, BGO, LaBr3. The results of the study are compared with that obtained previously with the older sample of the 12×12mm MPPC array made as a monolithic device. TSV MPPC array with the size of 24×24mm is one of the first commercially available SiPM with so large active area and with the dead space between channels minimized to only 0.2mm. Moreover in these devices Hamamatsu introduced resistors made with a new type of material. Such a change allowed lowering of crosstalks and afterpulses. These improved TSV MPPC arrays can be commercially used for scintillation light readout of “large” crystals with diameter of 1×1inch or 2×2inch, suitable for gamma spectrometry. Such combination may allow replacement of PMTs in monitoring handheld devices. The presented studies with MPPCs were carried out in the two main experimental conditions: direct illumination of the SiPM using a LED pulser and measurements with scintillators. The first method allowed the measurements of basic parameters of MPPCs such as breakdown voltage and excess noise factor (ENF). The second method allowed the measurements of the full scintillation detector parameters, such as: optimum operating voltage, number of photoelectrons (number of fired APD cells), photon detection efficiency (PDE), linearity and energy resolution.

Published
2014

19. Study of n-γ discrimination by zero-crossing method with SiPM based scintillation detectors

Author

Marek Moszynski, D. Wolski, S. Korolczuk, J. Baszak, Tomasz Szczesniak, Lukasz Swiderski, P. Schotanus, M. Grodzicka, and K. Grodzicki

Subjects
Physics, Scintillation, Optics, Silicon photomultiplier, Fall time, Physics::Instrumentation and Detectors, business.industry, Detector, Figure of merit, Neutron detection, Neutron, Scintillator, business
Abstract

The aim of this work is to provide the characteristics of MPPC as a part of neutron detector based on scintillators with n/γ discrimination capabilities. Measurements presented in the work cover: characterization of n/γ discrimination properties by means of Figure of Merit (FOM); comparison of scintillation light pulse shape measured with MPPC and PMT (rise time and fall time) and its influence on the ZC method; estimation of the number of photoelectrons per energy unit (phe/MeV) done by Bartolaccini method.

Published
2014

20. A concept of Irradiation Experiments System

Author

Bhaskar Mukherjee, S. Korolczuk, Ryszard S. Romaniuk, and Dominik Rybka

Subjects
Data acquisition, Computer science, Nuclear engineering, Modular system, Neutron, Irradiation, Electronics, Radiation, Radiation hardening, Ionizing radiation
Abstract

In modern high energy physics experiments the electronics modules for controlling and/or data acquisition are very often exposed to various ionising radiation fields. It's well known that it can cause many failures during work of such systems, even total break downs. In such case, the studies of radiation hardness of electronic devices should take place to avoid problems during the lifetime of the experiment. This article describes the idea of a universal modular system, which is under development at Warsaw Univeristy of Technology, to perform radiation experiments of various types of electronic devices. The concept and main advantages of the system are presented and discussed.

21. Deep neural networks for plasma tomography with applications to JET and COMPASS

Author

J. Denis, M. Tardocchi, Kiptily, M. Koubiti, M. Ghate, R. Michling, G. De Masi, T. Tala, M. Bassan, R. McAdams, S. Dowson, Antoine Merle, Seppo Koivuranta, O. J. Kwon, S. Mahesan, P. Sparapani, A. Malaquias, M. Tsalas, Gennady V. Miloshevsky, M. Vecsei, Michal Stano, E. Lerche, Štefan Matejčík, Piergiorgio Sonato, S. D. Pinches, A. Dal Molin, O. McCormack, B. Colling, F. Mink, Ph. Mertens, P. Drewelow, Nuno Cruz, D. Iglesias, Alessandro Zocco, K. Rathod, S. Collins, F. Koechl, James Buchanan, Andrew West, Francesco Maviglia, E. Stefanikova, David Taylor, B. Graham, T. Lunt, S. Meshchaninov, Arturo Buscarino, G. L. Ravera, Maide Bucolo, J. P. Thomas, S. Foley, B. Wakeling, N. Ashikawa, D. W. Robson, N. J. Conway, V. P. Lo Schiavo, Stefan Buller, Sergey Popovichev, M. Saleem, Jorge Luis Rodriguez, M. Wheatley, Gabriele Croci, Hugo Bufferand, J.F. Artaud, R. C. Felton, O. Kovanda, D. Hepple, K. Dylst, Gabor Szepesi, M. Oberkofler, G.J. van Rooij, N. Teplova, Istvan Cziegler, K. K. Kirov, S. Vartanian, Y. Xue, D. Nina, J. Bernardo, Lorenzo Figini, Guglielmo Rubinacci, Peter Lang, R. Scannell, N. C. Hawkes, P. Denner, Istvan Pusztai, D. D. Carvalho, Salvatore Ventre, A. Lescinskis, Afanasev, C. Hamlyn-Harris, Panagiotis Tolias, R. Vale, T. O'Gorman, S. Lesnoj, I.E. Day, Karol Malinowski, D. Carralero, N. Balshaw, Massimo Angelone, Michaele Freisinger, I. Monakhov, Jesús Vega, Jonathan Citrin, Antti Hakola, H. Patten, P. A. Simmons, Y. Austin, Sehyun Kwak, J. Regana, Rohde, T. Eich, A. Alkseev, R. Lawless, C. G. Elsmore, Fusco, S. Hacquin, S. A. Silburn, A. Fernades, Luigi Fortuna, P. Bunting, R. Sartori, Yuji Hatano, D. Borodin, L. Colas, Daniele Marocco, M. Lennholm, Carlo Sozzi, J. J. Rasmussen, P. McCullen, Tommy Ahlgren, A. Kirschner, Thomas Johnson, M. Rack, Göran Ericsson, Hans Nordman, Jakub Bielecki, P. Merriman, M. Cavedon, G. Hermon, Geert Verdoolaege, K. J. Gibson, Daisuke Nishijima, R. Clarkson, Fuchs, M. Tomes, R. Zagórski, Gerald Pintsuk, W. Higginson, Daniel F. Valcarcel, R. Mooney, K. Dawson, A. Tallargio, T.H. Osborne, P. J. Carvalho, M. Gethins, R. Dux, Pierre Dumortier, G. Urbanczyk, Inessa Bolshakova, R. King, B. Tal, Daniel Tegnered, J. W. Coenen, Leena Aho-Mantila, Eva Belonohy, S. Schmuck, Kai Nordlund, Grégoire Hornung, G. Tvalashvili, M. De Bock, Y. Baranov, G. De Tommasi, A. Urban, L. Forsythe, I. Zychor, J. Dobrashian, E. Clark, Paolo Arena, Alessia Santucci, Ivan Lupelli, S. Nowak, M. Curuia, Jonathan Graves, J. C. Hillesheim, Claudio Verona, Zoita, S. Moon, C. Castaldo, A.V. Stephen, Karl Schmid, A. Sahlberg, C. Di Troia, R. Woodley, L. Garzotti, D. Sandiford, Matthew M. Knight, Juho Leppänen, S. Emery, O. G. Pompilian, M. Goniche, C. Luna, M. Mayer, M. Baruzzo, A. Weckmann, M. Kempenaars, S. Hazel, Fabio Pisano, Claudia Corradino, A. G. Meigs, P. Leichauer, S. Potzel, Stéphane Devaux, C. Piron, G. Saibene, David A Rasmussen, Bruce Lipschultz, A. Di Siena, E. Lazzaro, J. Deane, C. Meadowcroft, C. J. Rapson, K.-D. Zastrow, Ph. Duckworth, Tom Wauters, F. Nabais, T. Goerler, D. Brunetti, R. Ellis, David Moulton, L. Jones, E. Delabie, Anna Salmi, Luciano Bertalot, G. Burroughes, B. Kos, Laurent Marot, Daniel Primetzhofer, I Miron, N. Lam, F. Napoli, S. Rowe, E. Pajuste, Choong-Seock Chang, R.P. Doerner, D. Silvagni, C. Guillemaut, S. Warder, A.J. Thornton, Matthew Carr, A. Dempsey, Jorge Morales, Pramit Dutta, J. L. Herfindal, S. Maruyama, P. Camp, X. Lefebvre, Ye. O. Kazakov, Andrea G. Chiariello, Gabriele Manduchi, Andre Neto, T. Powell, J. Griffiths, José Vicente, C. Barcellona, J. Hobirk, F. Clairet, L. Xiang, Dirk Reiser, H. Bergsåker, I. Duran, G. Giacometti, M. Kalsey, David Tskhakaya, A. Martin de Aguilera, T. Dittmar, Edmund Highcock, I. Uytdenhouwen, S. Soare, Giuseppe Prestopino, L. Chôné, W. Davis, G. De Temmerman, Basiuk, G. Learoyd, C. Guerard, A. Klix, M. Incelli, B. Viola, R. J. Robins, A. Burckhart, W. Leysen, Jochen Linke, M. Oberparleiter, A. Murari, M. Sertoli, S. D. Scott, A. Lazaros, R. Dejarnac, P. Buratti, H.R. Strauss, G. T. A. Huijsmans, Hajime Urano, Justine M. Kent, A. Kallenbach, D. Fagan, D. S. Darrow, Benedikt Geiger, A. Wynn, X. Sáez, B. Beckett, Horacio Fernandes, G. Ferro, B. Alper, George Wilkie, A. Uccello, T.C. Luce, S. Zoletnik, Petrzilka, Fulvio Auriemma, D. Guard, A. Ho, R. Henriques, I. T. Chapman, D. Butcher, Ph. Maquet, C. Crapper, S. Murphy, C. Ham, D. Brennan, S. Knott, Krasilnikov, D. Kogut, Cédric Pardanaud, K. Galazka, Nicolò Marconato, Daniele Bonfiglio, M. Sos, E. Militello-Asp, Nesenevich, Sean Conroy, S. Hall, L. F. Ruchko, L. Laguardia, O. Marchuk, F.P. Orsitto, I. S. Nedzelskiy, Eva Macusova, E. Andersson Sundén, C. Ayres, R. Prakash, C. Giroud, M. Parsons, R. Rodionov, M. Marin, A. P. Vadgama, A. Reed, Jacob Eriksson, P. Macheta, R. Neu, J. Orszagh, L. Gil, Riccardo Maggiora, M. Peterka, P. Devynck, M. Price, J. Likonen, Andrew M. Edwards, P. Dalgliesh, I. Vinyar, Andrea Malizia, A. Brett, Jane Johnston, A. Kappatou, P. Blatchford, B. Lloyd, P. Vincenzi, A. Mauriya, A. Garcia-Carrasco, Z. Stancar, D. B. Gin, Gediminas Stankunas, J. Edwards, Giuseppe Ambrosino, A. Goodyear, M. Lungaroni, M. Gardener, R.A. Pitts, Svetlana V. Ratynskaia, E. Ivings, Marek Rubel, L. Calacci, Ivo S. Carvalho, M. Afzal, M. Gherendi, D. Schworer, C. Watts, A. M. Messiaen, E. Safi, P. David, A. Petre, J. Uljanovs, U. von Toussaint, H. Greuner, D. Del Sarto, A.C.A. Figueiredo, D. Gallart, R. Bilato, M. Enachescu, P. Monaghan, M. S. J. Rainford, A. Boboc, M. Reinhart, Hiroyasu Utoh, B. P. Duval, L. Hackett, M. Halitovs, G. De Dominici, B. Lomanowski, P. Cahyna, Aslanyan, T. May-Smith, M. Richiusa, A. Goussarov, M. Okabayashi, R. Howell, T. Tadic, M. E. Manso, J. F. Rivero-Rodriguez, Wayne Arter, Ivan Calvo, U. Losada, H. Weisen, A. Teplukhina, Marica Rebai, R. Andrews, C. H. A. Hogben, M. Klas, A. E. Shevelev, J. McKehon, F. Reimold, Enrico Zilli, R. Maingi, M.F. Stamp, A. Rakha, H. T. Kim, D. Ciric, Eric Nardon, A. Somers, I. Igaune, E. Laszynska, S. Saarelma, A. Cullen, Mǎdǎlina Vlad, D. Nodwell, S. Griph, T. Donne, T. Boyce, M. Tyshchenko, Paulo Carvalho, Elena Bruno, Ion E. Stamatelatos, A. Patel, E. de la Luna, F. Causa, Robin Barnsley, Michael Lehnen, F. Belli, N. Jones, B. Bauvir, M. Tokitani, I. Turner, Y. Zhou, J. Simpson, A. Vitins, D. Rendell, Alberto Milocco, Benjamin P. Brown, F.G. Rimini, C. Lamb, V. Thompson, E. Alessi, S. Arshad, J. Rzadkiewicz, P. Prior, J. Moran, S. D. A. Reyes Cortes, Igor Bykov, M. Weiszflog, Annette M. Hynes, Gennady Sergienko, J. Lönnroth, T. C. Hender, M.-L. Mayoral, Mattia Frasca, R. Coelho, J-J Honore, A. Jackson, A. Sirinelli, M. D. Axton, Hyun-Tae Kim, F. P. Keenan, H. J. Boyer, Elisabeth Rachlew, T. Szabolics, J. Ongena, Braic, Sandra C. Chapman, Anders Nielsen, John E. Marsh, J. Jansons, S. Gloeggler, Nengchao Wang, Naulin, M. Porton, D. Falie, P. Welch, G. T. Jones, N. Fil, M. Vincent, U. Kruezi, R. Pereira, L. Horvath, M. F. F. Nave, Lorella Carraro, N. Fonnesu, Davide Flammini, P. V. Edappala, G. M. D. Hogeweij, K. Krieger, P. Card, G. Poulipoulis, W. Studholme, Didier Mazon, T. Odupitan, D. Young, F. J. Casson, N. Muthusonai, I. Jepu, Olivier Sauter, Dimitri Voltolina, Sara Carcangiu, C. Reux, Irena Ivanova-Stanik, D. Tskhakaya Jun, O. Bogar, E. Viezzer, Shane Cooper, Fabio Villone, Florin Spineanu, H. Doerk, E. Cecil, J. Goff, F. Nespoli, F. Schluck, G. Ciraolo, Jennifer M. Lehmann, Jan Mlynar, H. J. C. Oliver, M. Marinucci, N. Krawczyk, J. Buch, M. Dreval, G. Possnert, C. Angioni, C. P. Lungu, Marco Ariola, S. Breton, Christopher N. Bowman, A. Kundu, J. Mailloux, I. Stepanov, D. Sprada, J. Zacks, G. Ramogida, E. Wolfrum, N.W. Eidietis, A. Pires dos Reis, Barbara Cannas, Robert E. Grove, A. Huber, Giuliana Sias, A. Baron Wiechec, Markus Airila, M. Berry, P. Huynh, R. Kovaldins, R. Bastow, Darren Price, S. Abduallev, P. Tsavalas, N. Aiba, Plyusnin, Ion Tiseanu, James Williams, M. Beckers, M. Weiland, S.N. Gerasimov, Alessandra Fanni, L. D. Horton, T. Xu, L. Joita, N. Reid, D. Zarzoso Fernandez, D. I. Refy, Jerry Hughes, Clarisse Bourdelle, J. E. Boom, G. Hancu, K. M. Aggarwal, F. Crisanti, M. Poradziński, A. Loarte, P. Vallejos Olivares, T. Mrowetz, Teddy Craciunescu, R. Guirlet, M. Valentinuzzi, J. Stephens, J. Stober, Michael Barnes, Isabel L. Nunes, Mario Pillon, P. Batistoni, G. Verona Rinati, Fabio Moro, R. Lucock, R. Olney, Jari Varje, B. Butler, A. Mariani, M. Hamed, Skvara, C. Terry, Larisa Baumane, T. Alarcon, Mike Kotschenreuther, T. M. Biewer, O. Hemming, N. Marcenko, Z. Kollo, B. Slade, J. Garcia, T. R. Blackman, Simone Peruzzo, N. den Harder, S. Ng, P. Siren, K. G. McClements, Rita Lorenzini, Y. Yakovenko, Lorenzo Frassinetti, J. Hawes, A. Kirk, C. Noble, Nicola Bonanomi, Y. Martynova, A.E. Shumack, F. Di Maio, H. R. Koslowski, N. Pomaro, G. Nemtsev, M. I. K. Santala, Richard George, E. Giovannozzi, T. Giegerich, C. Woodley, G. Pucella, D. Hopley, P.J. Knight, Michela Gelfusa, Francesca Poli, G. Petravich, G. Kocsis, S. Lanthaler, J. A. Wilson, D. Coombs, F. Köchl, G. Stables, Silvia Spagnolo, D. Rigamonti, W. Van Renterghem, Mike Dunne, H. Betar, W. Pires de Sa, Stjepko Fazinić, M. Nocente, G. Birkenmeier, L. Avotina, A. Horton, P. Heesterman, Larry R. Baylor, C. Stavrou, L. Appel, Amosov, J. Fessey, J. Flanagan, C. Paz Soldan, G. Kaveney, R. Young, Shimpei Futatani, U. Samm, R. Naish, P. Strand, E. Lascas Neto, S. Wheeler, Daisuke Shiraki, S. P. Hotchin, D. M. Witts, A. Cobalt, C. Waldon, Davide Galassi, I. Jenkins, S. Panja, C. Gurl, A. Lukin, R. Albanese, Andrea Pavone, A. Davies, J. Hawkins, N. Vianello, C. Besiliu, F. Domptail, Bruno Santos, Y. Li, T. Kaltiaisenaho, O. N. Kent, X. Litaudon, B. Lescinskis, M. Faitsch, Otto Asunta, F. Eriksson, Pericoli, M. Beldishevski, G.A. Rattá, C. D. Challis, Z. Ghani, M. Juvonen, A. C. C. Sips, João M. C. Sousa, Boris Breizman, P. Finburg, Henrik Sjöstrand, Slawomir Jednorog, Ewa Kowalska-Strzęciwilk, A. Martin, R. O. Dendy, B. Lepiavko, D. Croft, Goloborod'ko, A. V. Krasilnikov, M. Wischmeier, K. Gal, R. Ragona, Petter Ström, N. Parsons, G. Calabrò, Jean-Stéphane Joly, A. Capat, Linwei Li, T. Nakano, Paulo Rodrigues, L. Moser, João P. S. Bizarro, L. Piron, K. Pepperell, P. Aleynikov, Ambrogio Fasoli, S.-P. Pehkonen, Giuseppe Gorini, C. Taliercio, M. E. Puiatti, J. Svensson, H. R. Wilson, John Wright, S. Wiesen, O. Asztalos, R.V. Budny, A. Withycombe, P. Piovesan, Jonathan Gaspar, B. D. Stevens, P. Trimble, Vinodh Bandaru, F. S. Zaitsev, H. Sheikh, G. F. Matthews, Daniele Carnevale, K. Schoepf, L. McNamee, A. Czarnecka, P. Blanchard, Erik Fransson, J.P. Coad, Daniel Dunai, Carolina Björkas, A. Manzanares, M. Reich, A. Lahtinen, L. Giacomelli, Mirko Salewski, E. de la Cal, T. D. V. Haupt, T.T.C. Jones, M. Anghel, Kyriakos Hizanidis, J. M. Fontdecaba, Huber, A. Shaw, A. Cufar, A. Muraro, M. Clark, A. Meakins, Roland Sabot, A. Owen, K. Valerii, A. L. Esquisabel, Petr Vondracek, Maria Teresa Porfiri, Walid Helou, S. E. Sharapov, D. Terranova, M. Skiba, Konstantina Mergia, Frank Leipold, Francisco L. Tabarés, M. Zerbini, Ken W Bell, Marco Marinelli, Marco Riva, R. Martone, Bobkov, B. Magesh, A. Ash, Parail, M. Hook, Amanda Hubbard, Silvio Ceccuzzi, Ulrich Fischer, G. Liu, Nick Walkden, R. Otin, P. Santa, P. Abreu, Demerdzhiev, Roberto Zanino, T. Spelzini, António J.N. Batista, P. G. Smith, L. Meneses, S. S. Medley, M. J. Mantsinen, K. Vasava, G. Gervasini, Surya K. Pathak, Kristel Crombé, G. Ellwood, P. Raj, Robert Hager, Ch. Linsmeier, C. Stokes, Petra Bilkova, M. Groth, G. Pautasso, C. R. Nobs, S. Sridhar, P. Chmielewski, David Hatch, Luca Boncagni, I. Balboa, C. Stan-Sion, Nobuyuki Asakura, R. McKean, L. Pigatto, João Figueiredo, Roberto Cavazzana, Juri Romazanov, M. Beurskens, C. Christopher Klepper, Maryna Chernyshova, O. Biletskyi, D. Karkinsky, A. Eksaeva, S. Dalley, Pasquale Gaudio, J. Benayas, J. Dankowski, S. Korolczuk, R. Buckingham, F. Parra Diaz, E. Wang, A. Cardinali, J. Naish, R. O. Pavlichenko, Kalle Heinola, Hiroshi Tojo, Miles M. Turner, Brett Chapman, A. Lyssoivan, F. Militello, E. Matveeva, T. Kobuchi, I. Ksiazek, P. Bohm, Cody Jones, W. Yanling, T. Jackson, P. Gohil, D. Alegre, Tim D. Bohm, F. Jaulmes, L. Zakharov, Peter J. Pool, C.G. Lowry, M. Passeri, D. Testa, Igor Lengar, A. Formisano, C. M. Roach, A. Hjalmarsson, A. Drenik, S. Meiter, William Tang, Carlos B. da Silva, Diogo R. Ferreira, P. J. Lomas, M. McHardy, Gunta Kizane, Angela Busse, S. Jachmich, Corneliu Porosnicu, Stanislas Pamela, Yavorskij, Eduardo Alves, Saskia Mordijck, Boniface Nkonga, J. Morris, Dean A. J. Whittaker, S. Ertmer, A. Hollingsworth, T. Barnard, R. Tatali, S. Reynolds, S. Mistry, Sergio Galeani, Torbjörn Hellsten, V.S. Neverov, David Dickinson, T. M. Huddleston, D. Baiao, F. Salzedas, D. Willoughby, M. Tripsky, Emmanuele Peluso, J. R. Harrison, C. Mazzotta, R. Zarins, M. Maslov, X. Bonnin, T. E. Gebhart, S. Fietz, K. Flinders, C. Hidalgo, Yann Corre, Aqsa Shabbir, A. B. Kukushkin, A. Shepherd, M.L. Walker, R. Clay, T. Vasilopoulou, Paolo Innocente, I. H. Coffey, P. Lalousis, Italo Predebon, R. Bravanec, P. Papp, D. Sytnykov, Ewa Pawelec, M. Bernert, G. Corrigan, Lutsenko, M. Romanelli, Gergely Papp, S. Romanelli, R. Salmon, J. Risner, M. T. Ogawa, A. M. Whitehead, E. Fable, H. Dabirikhah, Juan Manuel López, M. Turnyanskiy, A. Baciero, S. Meigh, M. Garcia-Munoz, Massimiliano Mattei, J.-M. Noterdaeme, N. Hamilton, S. Minucci, I Wilson, A. Muir, A. V. Chankin, C. Clements, Matthias Hoelzl, Francesco Romanelli, S. Gee, R. J. E. Smith, P. de Vries, L. Fittill, S. Menmuir, K. Cave-Ayland, P. Curson, Richard Fridström, D. Grist, S. A. Robinson, Rodney Walker, Michael Loughlin, S. Aleiferis, W. Broeckx, Clayton E. Myers, S. F. Smith, D. Harting, W. Zwingmann, F. Binda, Mark R. Gilbert, Rajnikant Makwana, Richard Goulding, D. Van Eester, I. Voitsekhovitch, M. Bowden, I. Kodeli, Tomasz Czarski, Peter Hawkins, S. S. Henderson, M. Koeppen, D. Ricci, Ondrej Ficker, Carl Hellesen, D. Yadikin, Fabio Subba, Luka Snoj, Anthony Laing, E. R. Solano, M. Stephen, P. Staniec, C. Appelbee, M. Newman, Susan Leerink, M. Nicassio, P. P. Pereira Puglia, M. Brombin, Wouter Tierens, C. Perez von Thun, Cédric Boulbe, Ya. I. Kolesnichenko, Taina Kurki-Suonio, S. Hallworth-Cook, R. P. Johnson, B. B. Carvalho, Anna Widdowson, Alessandro Pau, R. Price, B. Gonçalves, D. L. Keeling, Kazantzidis, Michael Fitzgerald, M. Hughes, K. D. Lawson, M. Brix, Raffaele Fresa, Juha Karhunen, S. Esquembri, K. Purahoo, Matthew Reinke, Gerd Meisl, M. Valovic, J. Horacek, D. King, H. Maier, Philipps, Kenji Tanaka, M. Kresina, M. Valisa, L. Omoregie, Gábor Cseh, Seppo Sipilä, Scott W. Mosher, Filippo Sartori, J. Kaniewski, Jan Weiland, Giuseppe Chitarin, Coccorese, A. R. Field, P. Beaumont, Robert Skilton, D. C. Campling, Mitul Abhangi, S. Villari, Roberta Lima Gomes, G. D. Ewart, S. Wray, A. Broslawski, A. Sinha, Roberto Paccagnella, S. Hollis, R. D. Wood, Albert Gutierrez-Milla, E. Jonasson, L.-G. Eriksson, R. Leach, L. W. Packer, M. Vuksic, H. J. Sun, C. Marchetto, Giuseppe Telesca, Dieter Leichtle, S. Cramp, Blaise Faugeras, M. Allinson, Yannis Kominis, R. Normanton, H. J. Leggate, Francesco Ghezzi, T. Schlummer, Tommaso Bolzonella, Jorge Ferreira, M. J. Walsh, C. Day, Philipp Drews, Steven J. Meitner, M. D. J. Bright, Per Petersson, D. L. Hillis, M. Webb, P. Wright, C. F. Maggi, B. Sieglin, A. Farahani, J. Strachan, M. Muraglia, M. Cecconello, F. Durodié, D. Callaghan, J. Waterhouse, R. J. Dumont, Sara Moradi, Patrick J. McCarthy, S. Feng, M. Balden, M. Kaufman, R. Warren, Brian Grierson, Harry M. Meyer, S.C. Bradnam, D. Kinna, A. Krivska, M. Lungu, E. Suchkov, A. Kantor, D. Conka, C. Penot, A. Zarins, Pierre Manas, D. F. Gear, J. Callaghan, L. Barrera Orte, Tomas Markovic, Yu Gao, A. Lunniss, Z. Vizvary, E. Khilkevich, Th. Puetterich, Dmitry Matveev, E. Perelli Cippo, T. Owen, N. Imazawa, A. Silva, H. P. Summers, Norberto Catarino, Roberto Pasqualotto, P. Muscat, K. Keogh, Ricardo Magnus Osorio Galvao, P. Carman, M. Leyland, E. Veshchev, A. de Castro, M. Gruca, D. C. McDonald, L. Moreira, J. W. Banks, Sanjeev Ranjan, N. Sutton, Iris D. Young, Martin Imrisek, W. Zhang, J. K. Blackburn, Moiseenko, A. Parsloe, T. Loarer, D. N. Borba, S.J. Wukitch, D. P. Coster, J. Penzo, Jose Ramon Martin-Solis, P. Mantica, N. Bekris, M. G. O'Mullane, S. E. Dorling, Yunfeng Liang, S. Gulati, Roberto Ambrosino, J. Schweinzer, Cocilovo, D. Douai, M. A. Henderson, T. Suzuki, Gianluca Rubino, A. Peackoc, Yann Camenen, Y. Miyoshi, Ph. Jacquet, H. T. Lambertz, E. Tholerus, C. Sommariva, Prajapati, Yannick Marandet, F. Hasenbeck, Faa Federico Felici, M. Buckley, Kenneth Hammond, Daniele Milanesio, Cristian Ruset, Katsumichi Hoshino, D. Frigione, D. Chandra, I. Borodkina, P. Dinca, S. Brezinsek, J. Stallard, H. G. Esser, Matthew Sibbald, S. Knipe, Jorge Estrela da Silva, Kensaku Kamiya, P. A. Coates, J. C. Giacalone, Alfredo Pironti, Carvalho, D. D., Ferreira, D. R., Carvalho, P. J., Imrisek, M., Mlynar, J., Fernandes, H., and Formisano, A.

Subjects
Computer science, Feature extraction, Image processing, Computerized Tomography (CT) and Computed Radiography (CR), Plasma diagnostics - interferometry, spectroscopy and imaging, 01 natural sciences, Convolutional neural network, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, 0302 clinical medicine, Compass, Plasma diagnostics-interferometry, spectroscopy and imaging, 0103 physical sciences, Computer vision, Instrumentation, Mathematical Physics, Jet (fluid), Contextual image classification, 010308 nuclear & particles physics, business.industry, Cognitive neuroscience of visual object recognition, Plasma diagnostics - interferometry spectroscopy and imaging, Tomography, Artificial intelligence, business, plasma diagnostics - interferometry, spectroscopy and imaging
Abstract

Convolutional neural networks (CNNs) have found applications in many image processing tasks, such as feature extraction, image classification, and object recognition. It has also been shown that the inverse of CNNs, so- called deconvolutional neural networks, can be used for inverse problems such as plasma tomography. In essence, plasma tomography consists in reconstructing the 2D plasma profile on a poloidal cross-section of a fusion device, based on line-integrated measurements from multiple radiation detectors. Since the reconstruction process is computationally intensive, a deconvolutional neural network trained to produce the same results will yield a significant computational speedup, at the expense of a small error which can be assessed using different metrics. In this work, we discuss the design principles behind such networks, including the use of multiple layers, how they can be stacked, and how their dimensions can be tuned according to the number of detectors and the desired tomographic resolution for a given fusion device. We describe the application of such networks at JET and COMPASS, where at JET we use the bolometer system, and at COMPASS we use the soft X-ray diagnostic based on photodiode arrays.

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23. First spatially resolved measurements of the D- 3 He α-particle source with the upgraded JET gamma-ray camera.

Author

Panontin E, Rigamonti D, Nocente M, Dal Molin A, Broslawski A, Craciunescu T, Croci G, Cruz N, Figueiredo J, Giacomelli L, Gorini G, Gosk M, Kaveney G, Kazakov YO, Kiptily V, Korolczuk S, Marcer G, Murari A, Perelli Cippo E, Salewski M, Urban A, Zychor I, and Tardocchi M

Abstract

The Joint European Torus (JET) gamma-ray camera has been recently upgraded with the installation of new gamma-ray detectors, based on LaBr 3 (Ce) scintillation crystals, which add spectroscopic capability to the existing system allowing measurements with good energy resolution (5% at 0.622 MeV), a dynamic range from hundreds of keV up to about 30 MeV, and high counting rate capabilities of MCps. First gamma-ray measurements during the C38 campaign of the JET have been successfully carried out, in particular, in D- 3 He plasmas from three-ion ion cyclotron resonance heating experiments, where the detection of 16.4 MeV γ-rays from D + 3 He → γ + 5 Li reactions with the gamma-ray camera upgrade allowed determining the spatial profile of alpha particles born in D + 3 He fusion reactions.

Published
2021
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24. The upgraded JET gamma-ray cameras based on high resolution/high count rate compact spectrometers.

Author

Rigamonti D, Broslawski A, Fernandes A, Figueiredo J, Giacomelli L, Gorini G, Gosk M, Kaveney G, Kiptily V, Korolczuk S, Murari A, Nocente M, Pereira RC, Popovichev S, Santos B, Urban A, Zychor I, and Tardocchi M

Abstract

The JET gamma-ray cameras have been recently upgraded within the gamma-ray camera upgrade project in support of development of JET high performance deuterium plasma scenarios and in preparation of deuterium-tritium experiments. New, dedicated detectors based on a LaBr 3 crystal and silicon photo-multipliers have been developed and replaced pre-existing CsI detectors in all 19 channels. The new instrument gives opportunity of making two-dimensional gamma-ray measurements with a counting rate capability exceeding 1 MCounts/s (MCps) and energy resolution better than 5% at 1.1 MeV. The upgrade is of relevance for fast ion and runaway electron physics studies in high performance deuterium discharges and also in plasmas with tritium at neutron yields in the range up to about 5 × 10 17 n/s.

Published
2018
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25. Performance of the prototype LaBr 3 spectrometer developed for the JET gamma-ray camera upgrade.

Author

Rigamonti D, Muraro A, Nocente M, Perseo V, Boltruczyk G, Fernandes A, Figueiredo J, Giacomelli L, Gorini G, Gosk M, Kiptily V, Korolczuk S, Mianowski S, Murari A, Pereira RC, Cippo EP, Zychor I, and Tardocchi M

Abstract

In this work, we describe the solution developed by the gamma ray camera upgrade enhancement project to improve the spectroscopic properties of the existing JET γ-ray camera. Aim of the project is to enable gamma-ray spectroscopy in JET deuterium-tritium plasmas. A dedicated pilot spectrometer based on a LaBr 3 crystal coupled to a silicon photo-multiplier has been developed. A proper pole zero cancellation network able to shorten the output signal to a length of 120 ns has been implemented allowing for spectroscopy at MHz count rates. The system has been characterized in the laboratory and shows an energy resolution of 5.5% at E γ = 0.662 MeV, which extrapolates favorably in the energy range of interest for gamma-ray emission from fast ions in fusion plasmas.

Published
2016
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26. Gamma-ray spectroscopy at MHz counting rates with a compact LaBr 3 detector and silicon photomultipliers for fusion plasma applications.

Author

Nocente M, Rigamonti D, Perseo V, Tardocchi M, Boltruczyk G, Broslawski A, Cremona A, Croci G, Gosk M, Kiptily V, Korolczuk S, Mazzocco M, Muraro A, Strano E, Zychor I, and Gorini G

Abstract

Gamma-ray spectroscopy measurements at MHz counting rates have been carried out, for the first time, with a compact spectrometer based on a LaBr 3 scintillator and silicon photomultipliers. The instrument, which is also insensitive to magnetic fields, has been developed in view of the upgrade of the gamma-ray camera diagnostic for α particle measurements in deuterium-tritium plasmas of the Joint European Torus. Spectra were measured up to 2.9 MHz with a projected energy resolution of 3%-4% in the 3-5 MeV range, of interest for fast ion physics studies in fusion plasmas. The results reported here pave the way to first time measurements of the confined α particle profile in high power plasmas of the next deuterium-tritium campaign at the Joint European Torus.

Published
2016
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