BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Comparative studies of plastic scintillator strips with high techn ical attenuation length for the total-body J-PET scanner DTSTART;VALUE=DATE-TIME:20220715T074500Z DTEND;VALUE=DATE-TIME:20220715T080500Z DTSTAMP;VALUE=DATE-TIME:20260720T192543Z UID:indico-contribution-55-714@indico.koza.if.uj.edu.pl DESCRIPTION:Speakers: Łukasz Kapłon\; Jagiellonian University\, Poland ( )\nŁ. Kapłon 1\, 2\, 3\, on behalf of the J-PET Collaboration\n\n1 Facul ty of Physics\, Astronomy and Applied Computer Science\, Jagiellonian Univ ersity\, Krakow\, Poland\n2 Total-Body Jagiellonian-PET Laboratory\, Jagie llonian University\, Krakow\, Poland\n3 Center for Theranostics\, Jagiello nian University\, Krakow\, Poland\n\nCorresponding author: lukasz.kaplon@u j.edu.pl\n\nPlastic scintillators are used in many applications connected with advanced medical devices\, for example in novel multiphoton J-PET sca nners with positronium imaging capability [1\, 2]\, and in plastic scintil lation dosimetry [3].\n\nIn the first part of the lecture\, results from m easurements of transparency of commercially available plastic scintillator s will be presented [4]. Purpose of the research is to select the best typ e of scintillator for the total-body J-PET scanner construction. Emission spectra\, transmission spectra and technical attenuation length (TAL) valu es of six types of plastic scintillators with dimensions 6 mm × 24 mm × 1000 mm will be discussed. General purpose\, blue-emitting plastic scintil lators with low attenuation of visible light were tested: polyvinyl toluen e-based BC-408\, EJ-200\, RP-408 and polystyrene-based Epic\, SP32 and UPS -923A. The emission spectra of the investigated scintillators have maxima ranging from 420 nm to 429 nm. The BC-408 and EJ-200 scintillators have th e highest transmittance values of about 90% at the maximum emission wavele ngth (measured through a 6 mm thick scintillator) and the highest TAL valu es up to about 200 cm\, allowing building of long modules for total-body J -PET scanner.\n\nIn the second part of the talk\, results from the researc h of blue- and green-emitting polystyrene-based plastic scintillators for scintillation dosimetry applications will be presented [5]. Anthracene\, c oumarin and perylene fluorescent dyes were used as wavelength shifters [6] . Emission maxima of manufactured green-emitting polystyrene scintillators are in range from 484 to 525 nm. The concentrations of the BPBD ultraviol et dye and Solvent Green 5 green fluorescent dye\, influence the light out put\, rise and fall times\, and the emission spectra of the scintillator s amples.\n\nReferences:\n[1] P. Moskal\, E. Stępień\, PET Clinics 15 (202 0) 439-452\n[2] P. Moskal et al.\, Science Advances 7 (2021) eabh4394\n[3] S. Beddar et al.\, 12th chapter in: M. Hamel (Ed.)\, Plastic Scintillator s. Springer 2021\n[4] Ł. Kapłon\, IEEE Transactions on Nuclear Science 6 7 (2020) 2286-2289\n[5] Ł. Kapłon\, G. Moskal\, Bio-Algorithms and Med-S ystems 17 (2021) 191–197\n[6] Ł. Kapłon\, G. Moskal\, Submitted to Opt ical Materials: X (2022).\n\nThis work was supported by grant for the earl y stage of research financing from Centre for Technology Transfer CITTRU f rom the Jagiellonian University in 2021\; the Priority Research Area DigiW orld under the program Excellence Initiative Research University at the Ja giellonian University in 2021\; the National Science Centre of Poland thro ugh grant OPUS No. 2019/35/B/ST2/03562\, and the Jagiellonian University u nder project No. CRP/0641.221.2020. The authors acknowledge support by the TEAM POIR.04.04.00-00-4204/17 program\, the National Science Center grant no. 2021/42/A/ST2/00423 and the SciMat and qLife Priority Research Areas budget under the program Excellence Initiative - Research University at th e Jagiellonian University.\n\nhttps://indico.koza.if.uj.edu.pl/event/7/con tributions/714/ LOCATION:Collegium Novodvorscianum URL:https://indico.koza.if.uj.edu.pl/event/7/contributions/714/ END:VEVENT BEGIN:VEVENT SUMMARY:Optimization study of a muon tomography system for imaging of nucl ear waste containers DTSTART;VALUE=DATE-TIME:20220715T072500Z DTEND;VALUE=DATE-TIME:20220715T074500Z DTSTAMP;VALUE=DATE-TIME:20260720T192543Z UID:indico-contribution-55-713@indico.koza.if.uj.edu.pl DESCRIPTION:Speakers: Anzori Georgadze\; Kiev Institute for Nuclear Resear ch\, Ukraine ()\nThe important parameters of nuclear waste have to be dete rmined for its classification and selection of optimal disposal option. Fo r the non-destructive characterization of nuclear waste muon scattering to mography techniques can be used to image the contents of an enclosed volum e by measuring the scattering angle of cosmic ray muons as they pass throu gh a nuclear waste container using particle tracking detectors. In this pa per we present an optimization study of a muon tomography detector to obta in its parameters for best performance. Using Geant4 combined with Cosmic- ray shower generator (CRY) we have studied two detector geometries to comp are their efficiency of detection and reconstruction of high-Z materials. One of detector design consist of muon two tracking detectors placed on to p and bottom sides of nuclear waste container and another one represents c losed up design when muon trackers are surrounding container from four sid es. The results of POCA reconstruction of 10 cm cubic size object of high- Z material encapsulated in a concrete matrix indicate that detector design with tracking detectors on four sides around container demonstrate slight ly better performance comparing to detector design with two tracking detec tors on top and bottom. On the other hand\, tomography system with muon tr ackers on top and bottom sides can be more universal allowing changing the distance between planes and measuring nonstandard nuclear waste.\n\nhttps ://indico.koza.if.uj.edu.pl/event/7/contributions/713/ LOCATION:Collegium Novodvorscianum URL:https://indico.koza.if.uj.edu.pl/event/7/contributions/713/ END:VEVENT BEGIN:VEVENT SUMMARY:Key talk: 10ps Time-of-Flight PET scanner: From Hope to Practice DTSTART;VALUE=DATE-TIME:20220715T070000Z DTEND;VALUE=DATE-TIME:20220715T072500Z DTSTAMP;VALUE=DATE-TIME:20260720T192543Z UID:indico-contribution-55-712@indico.koza.if.uj.edu.pl DESCRIPTION:Speakers: Paul Lecoq\; CERN\, Switzerland ()\nThe future gener ation of radiation detectors is more and more demanding on timing performa nce for a wide range of applications\, in particular for time-of-flight (T OF) techniques in PET cameras.\nThere is in particular a consensus for gat hering Europe's multi-disciplinary academic and industrial excellence arou nd the ambitious challenge to develop a 10 ps TOF PET scanner (TOFPET). Th e goal is to reduce the radiation dose (currently 5-25 mSv for whole body PET/CT)\, scan time (currently > 10 minutes)\, and costs per patient (curr ently > 1000 € per scan)\, all by an order of magnitude. To achieve this very ambitious goal it is essential to significantly improve the performa nce of each component of the detection chain: light production\, light tra nsport\, photodetection\, readout electronics.\nThe possibility to reach 1 0 ps time-of-flight resolution at small energies\, as required in PET scan ners\, although extremely challenging\, is not limited by physical barrier s.\nThis talk will show how progress in nanotechnologies open new perspect ives for the development of meta-scintillators\, a new class of multifunct ional multi-intelligent scintillators.\nIndeed\, a number of disruptive te chnologies\, such as multifunctional heterostructures\, combining the high stopping power of well know scintillators with the ultrafast photon emiss ion resulting from the 1D\, 2D\, or 3D quantum confinement of the excitons in nanocrystals\, photonic crystals\, photonic fibers\, as well as new co ncepts of 3D digital SiPM structures\, open the way to new radiation detec tor concepts with unprecedented performance.\n\nhttps://indico.koza.if.uj. edu.pl/event/7/contributions/712/ LOCATION:Collegium Novodvorscianum URL:https://indico.koza.if.uj.edu.pl/event/7/contributions/712/ END:VEVENT END:VCALENDAR