BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Status of low-pressure Time Projection Chamber for ion identificat ion in Accelerator Mass Spectrometry DTSTART;VALUE=DATE-TIME:20230906T104000Z DTEND;VALUE=DATE-TIME:20230906T110000Z DTSTAMP;VALUE=DATE-TIME:20260521T112951Z UID:indico-contribution-522-3215@indico.tlabs.ac.za DESCRIPTION:Speakers: Tamara Shakirova (Budker Institute of Nuclear Physic s)\nThe Accelerator Mass Spectrometry technique makes it possible to measu re rare long-lived isotopes such as 10Be\, 14C\, 26Al\, 129I. The content of these isotopes can be at the level of $10^{-15}$ of the total element c ontent. The Accelerator Mass Spectrometer developed by Budker Institute of Nuclear Physics (BINP AMS) successfully measures the concentration of 14C relative 12C. However\, there is a problem of separating the 10B isobaric background from 10Be. Beryllium-10 is used to date geological objects on a time scale from 1 thousand years to 10 million years.\nTo solve this pro blem we have proposed a new technique for ion identification based on meas uring both ion track ranges and ion energies in a low-pressure Time-Projec tion Chamber (TPC) with Gas Electron Multiplier (GEM) readout. We have dev eloped the TPC with a dedicated thin silicon nitride window for an efficie nt passage of ions. To begin with\, the characteristic of the low-pressure TPC were studied in isobutane at a pressure of 50 torr using alpha partic le sources. \nIn this work\, we set up the low-pressure TPC on BINP AMS fa cility and successfully measured track ranges and energies of ions from sa mples containing 14C. At the next stage\, we are going to carry out measur ements with samples containing 10Be. However\, using the obtained results and SRIM simulation we have already shown that the isobaric boron and bery llium ions can be separated by more than 10 sigma. This technique is propo sed to be applied in AMS for dating geological objects\, namely for geochr onology of Cenozoic era.\n\nhttps://indico.tlabs.ac.za/event/112/contribut ions/3215/ LOCATION: Meeting Room 2.64 - 2.66 URL:https://indico.tlabs.ac.za/event/112/contributions/3215/ END:VEVENT BEGIN:VEVENT SUMMARY:3DΠ: A Novel Total-Body PET Scanner Using Xenon-Doped Liquid Argo n Scintillator with SiPM-based Photosensors DTSTART;VALUE=DATE-TIME:20230906T102000Z DTEND;VALUE=DATE-TIME:20230906T104000Z DTSTAMP;VALUE=DATE-TIME:20260521T112951Z UID:indico-contribution-522-3212@indico.tlabs.ac.za DESCRIPTION:Speakers: Azam Zabihi (Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences\, ASTROCENT\, Warsaw\, Poland)\nThe 3D Π scanner is a Total-Body (TB)\, Time Of Flight (TOF)\, Positron Emission Tomography (PET) imaging device that utilizes silicon photomultiplier-bas ed technology and a Xenon-doped Liquid Argon (LAr) scintillator. The scann er has an axial field-of-view (AFOV) of 200 cm and consists of 9 double-si ded concentric rings of SiPM panels. The addition of Xenon doping to the L Ar scintillator suppresses the long-lifetime component of the scintillatio n light\, allowing for higher data rates and potentially higher patient do ses\, if needed for a specific application. This is due to the faster de-e xcitation process in the LAr-Xenon mixture\, which allows for direct energ y transfer and emission of Xenon light\, compared to traditional fluoresce nce processes involving wavelength shifters (WLS). Moreover\, studies have shown that lowering the operating temperature of SiPMs to match the tempe rature of LAr significantly reduces the dark count rate within the SiPM.\n \nThe 3DΠ scanner project is a medical imaging application of the ongoing research and development efforts of the DarkSide collaboration\, which is focused on direct dark matter particle searches using LAr targets. The 3D Π monte carlo simulation package has been derived from the DarkSide simul ation package\, which is based on the Geant4 toolkit. The main objective o f our study was to evaluate the performance of the 3DΠ scanner using esta blished NEMA NU 2–2018 standards for spatial resolution\, sensitivity\, image quality\, count rate performance\, and timing resolution.\n\nThe sen sitivity of the 3DΠ scanner was measured to be 564.02 kcps/MBq at the cen ter of the scanner. The noise-equivalent count rates (NECRs) were found to be 1.5 Mcps at a concentration of 5.3 kBq/mL\, and increased to 3 Mcps at a concentration of 21.2 kBq/mL. The TOF resolution was measured as 160 ps . These preliminary results indicate that the system performance of the 3D Π scanner is comparable to\, if not better than\, other commercial scanne rs.\n\nhttps://indico.tlabs.ac.za/event/112/contributions/3212/ LOCATION: Meeting Room 2.64 - 2.66 URL:https://indico.tlabs.ac.za/event/112/contributions/3212/ END:VEVENT BEGIN:VEVENT SUMMARY:The X-rays detector system of the FAMU Experiment for the measurem ent of the muon transfer rate to carbon DTSTART;VALUE=DATE-TIME:20230906T100000Z DTEND;VALUE=DATE-TIME:20230906T102000Z DTSTAMP;VALUE=DATE-TIME:20260521T112951Z UID:indico-contribution-522-3111@indico.tlabs.ac.za DESCRIPTION:Speakers: Simone Monzani ()\nThe study of the properties of th e proton is based on spectroscopy measurements. The FAMU experiment aims t o meaure the Zemach radius of the proton through exotic atoms. In particul ar the hyperfine splitting (HFS) of the energy ground levels of the muonic hydrogen (µp) is directly related to the Zemach radius. In presence of a gas mixture\, muons are transferred from µp to heavier gas with energy-d ependent rate resulting also in a higher rate of X-rays. An efficient and fast detector system is required for such a precise measurement. The exper iment is based on LaBr3(Ce) fast timing X-rays detectors read by PMTs.\nPe rformances of the detector system had been analyzed in order to obtain the measurement of the muon transfer rate to carbon and they are presented he re.\n\nhttps://indico.tlabs.ac.za/event/112/contributions/3111/ LOCATION: Meeting Room 2.64 - 2.66 URL:https://indico.tlabs.ac.za/event/112/contributions/3111/ END:VEVENT BEGIN:VEVENT SUMMARY:HEPS-BPIX40: the upgrade of the hybrid pixel detector for the High Energy Photon Source DTSTART;VALUE=DATE-TIME:20230906T094000Z DTEND;VALUE=DATE-TIME:20230906T100000Z DTSTAMP;VALUE=DATE-TIME:20260521T112951Z UID:indico-contribution-522-2820@indico.tlabs.ac.za DESCRIPTION:Speakers: Wei Wei (IHEP\, CAS)\nHEPS-BPIX40 is a new hybrid pi xel detector specifically designed for the High Energy Photon Source\, whi ch is currently under construction in Beijing\, China. It is a full upgrad e from both the chip and detector module of its former version\, BPIX20. T he pixel chip comprises a matrix of 128 x 96 pixels\, with each pixel meas uring 140 μm x 140 μm. The pixel circuit operates in the single photon c ounting mode with dual thresholds\, featuring programmable gains for diffe rent beam energies and deadtimeless readout. The counting depth for each t hreshold is designed to be 14 bits\, and the frame rate was tested to be 2 kHz when operating in continuous readout mode. The chip was designed usin g CMOS 130 nm technology and fabricated by 12-inch wafers\, with a yield o f 97% tested by a dedicated probe card. Assembled by 2 x 6 chips\, a detec tor module covers an area of 3.7 cm x 8.1 cm. The periphery circuit of the chip was optimized along its height\, allowing the assembly gap between m ultiple modules to be as small as 3 mm\, even with conventional wire-bondi ng processes. All chips of the module were bump bonded by the CuSn process with high yield. The noise after packaging was tested to be about 112e-\, and the equalized non-uniformity was found to be 123e-. The full system w ill consist of 40 modules to implement a detector with approximately six m illion pixels. This paper presents a detailed design and test results of t he detector.\n\nhttps://indico.tlabs.ac.za/event/112/contributions/2820/ LOCATION: Meeting Room 2.64 - 2.66 URL:https://indico.tlabs.ac.za/event/112/contributions/2820/ END:VEVENT BEGIN:VEVENT SUMMARY:Positron Emission Tomography with Pixelized Liquid Argon Detectors DTSTART;VALUE=DATE-TIME:20230906T092000Z DTEND;VALUE=DATE-TIME:20230906T094000Z DTSTAMP;VALUE=DATE-TIME:20260521T112951Z UID:indico-contribution-522-2824@indico.tlabs.ac.za DESCRIPTION:Speakers: Mitch Soderberg (Syracuse University)\nThere have be en significant advances in the use of Liquid Argon Time Projection Chamber s (LArTPCs) for the study of neutrinos in recent years. The low-energy par ticle identification capabilities and scalability of LArTPCs with pixelate d charge readout systems could provide enhanced performance in detecting t he Compton scattering of photons used in medical imaging techniques such a s Positron Emission Tomography (PET). This presentation will describe inve stigations of the optimization of LArTPCs for the detection of photons wit h energies corresponding to those used in PET scans\, which already sugges t the potential for significant improvement over traditional PET devices b ased on scintillation crystals. The details of a simulation that includes both charge and light collection in a pixel-based LArTPC will be described \, as will the status of efforts to measure the performance of a prototype device using radioactive sources. Finally\, preliminary plans for a large r-scale PET LArTPC device will be discussed.\n\nhttps://indico.tlabs.ac.za /event/112/contributions/2824/ LOCATION: Meeting Room 2.64 - 2.66 URL:https://indico.tlabs.ac.za/event/112/contributions/2824/ END:VEVENT BEGIN:VEVENT SUMMARY:Status of the FOOT experiment and first measurements of 16O fragme ntation cross sections on C target DTSTART;VALUE=DATE-TIME:20230906T090000Z DTEND;VALUE=DATE-TIME:20230906T092000Z DTSTAMP;VALUE=DATE-TIME:20260521T112951Z UID:indico-contribution-522-2825@indico.tlabs.ac.za DESCRIPTION:Speakers: Gaia Franciosini (University Rome)\nThe study of nuc lear fragmentation plays a central role in many important applications: fr om the study of Particle Therapy up to radiation protection for space miss ions. \nIn Particle Therapy\, nuclear interactions of the beam with the pa tient’s body causes fragmentation of both the projectile and target nucl ei.\nIn treatments with protons\, target fragmentation generates short ran ge secondary particles along the beam path\, that may deposit a non-neglig ible dose especially in the entry channel. On the other hand\, in treatmen ts with heavy ions\, such as C or other potential ions of interest\, like He or O\, the main concern is long range fragments produced by projectile fragmentation\, that release the dose in the healthy tissues downstream of the tumor volume. 
\nFragmentation processes need to be carefully taken into account when planning a treatment\, in order to keep the dose accura cy within the recommended 3% of tolerance level.\nThe assessment of the im pact that these processes have on the released dose is currently very limi ted from the lack of experimental data\, especially for the relevant fragm entation cross sections. For this reason\, treatment plans are not yet abl e to include the fragmentation contribution to the dose map with the requi red accuracy.\nThe FOOT (FragmentatiOn Of Target) collaboration designed a n experiment to fill this gap in experimental data\, aiming the measuremen t of the differential cross sections of interest. In this contribution\, a n overview of the FOOT experiment\, including the present detector design and the expected performances will be discussed. In addition the measureme nt of the elemental fragmentation cross sections for a 16O beam of 400 MeV /u kinetic energy interacting with a graphite target using a partial setup composed of the FOOT scintillator detectors for the time of flight (TOF) and energy loss (ΔE) measurements together with a drift chamber\, used as beam monitor\, will be shown.\n\nhttps://indico.tlabs.ac.za/event/112/con tributions/2825/ LOCATION: Meeting Room 2.64 - 2.66 URL:https://indico.tlabs.ac.za/event/112/contributions/2825/ END:VEVENT END:VCALENDAR