BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Design and Prototype Testing of the Homogeneous Crystal Calorimete r for STCF DTSTART;VALUE=DATE-TIME:20230905T160000Z DTEND;VALUE=DATE-TIME:20230905T162000Z DTSTAMP;VALUE=DATE-TIME:20260606T141530Z UID:indico-contribution-517-3323@indico.tlabs.ac.za DESCRIPTION:Speakers: Yong Song (University of Science and Technology of C hina)\nThe Super Tau-Charm Facility (STCF) is the next generation high lum inosity $e^{+}e^{-}$ collider focusing on the tau-charm physics. STCF will achieve a luminosity of over $0.5\\times10^{35} cm^{-2}s^{-1}$ at 4 GeV\, resulting in a high event rate and a high beam background for the detecto r system. The background count rate of over 1 MHz per module places new de mands on the electromagnetic calorimeter (EMC): maintaining good energy an d position resolution under severe pileup conditions. Meanwhile\, the deve lopment of event timing and particle identification capability is also an important aspect of calorimeter R&D\, where a time resolution of better th an hundreds of picoseconds is expected.\n\nThis talk summarizes the simula tion and optimization of the calorimeter system\, the prototype fabricatio n and the test results on the prototype are summarized. The STCF EMC is ba sed on a fast pure $CsI$ crystal and is read out by avalanche photodiodes (APD). By considering the effect of crystal and electronics response\, as well as the pileup condition\, a complete chain of simulation and reconstr uction is implemented in the Offline Software of Super Tau-Charm Facility (OSCAR). The architecture and module geometry of EMC are designed by optim izing the physical performance under OSCAR. Based on the module design\, a novel wavelength shifter (WLS)-enhanced prototype is fabricated\, which f eatures fast time response and good signal-to-noise ratio at a reasonable cost. The comprehensive test results on the prototype\, especially on the radiation hardness of the prototype\, the uniformity of the light collecti on and the cosmic ray-timing performance of the prototype\, are also prese nted.\n\nhttps://indico.tlabs.ac.za/event/112/contributions/3323/ LOCATION: Meeting Room 2.64 - 2.66 URL:https://indico.tlabs.ac.za/event/112/contributions/3323/ END:VEVENT BEGIN:VEVENT SUMMARY:The DEPFET based all-silicon module for the Belle II Pixel Detecto r PXD: construction\, assembly and installation DTSTART;VALUE=DATE-TIME:20230905T154000Z DTEND;VALUE=DATE-TIME:20230905T160000Z DTSTAMP;VALUE=DATE-TIME:20260606T141530Z UID:indico-contribution-517-3284@indico.tlabs.ac.za DESCRIPTION:Speakers: Laci Andricek (MPG HLL)\nBelle II located at the Sup erKEKB collider at KEK\, Japan\, started data taking in March 2019 and is currently in the 1st long shutdown (LS1) after reaching the peak luminosit y of 4.7e34 /cm2.s and collected about 430 fb-1 of data. Crucial to the Be lle II detector is the Pixel Sub-Detector (PXD)\, which provides precise v ertexing capabilities in a challenging radiation environment. LS1 opens th e opportunity to replace the 1st de-scoped version of PXD (PXD1) with the fully completed arrangement of DEPFET modules forming PXD2.\n\nThis presen tation focuses on the concept and assembly of the unique DEPFET based all- silicon modules for PXD1 and PXD2\, discussing the performance of PXD1 and transition from PXD1 to PXD2. PXD2 passed the commissioning phase and is at the time of writing being installed in the interaction region of Belle II. \n\nWe will describe in detail our experience during the construction and assembly of the modules. The presented technology allows the currently most light-weight pixel detector in operation. The material is just about 0.2% of a radiation length including all structures needed for interconne ction\, support\, and thermal management. This is only possible with the u nique approach where all read-out ASICs and interconnects are integrated o n a micro-machined and self-supporting piece of silicon with the ultra-thi n active DEPFET pixel sensor as integral part of the module.\n\nWe will co nclude with the application of this module concept for other experiments l ike direct electron detectors and the outlook to integration of micro-chan nels into the supporting silicon.\n\nhttps://indico.tlabs.ac.za/event/112/ contributions/3284/ LOCATION: Meeting Room 2.64 - 2.66 URL:https://indico.tlabs.ac.za/event/112/contributions/3284/ END:VEVENT BEGIN:VEVENT SUMMARY:Detector challenges of the strong-field QED experiment LUXE at the European XFEL DTSTART;VALUE=DATE-TIME:20230905T152000Z DTEND;VALUE=DATE-TIME:20230905T154000Z DTSTAMP;VALUE=DATE-TIME:20260606T141530Z UID:indico-contribution-517-3223@indico.tlabs.ac.za DESCRIPTION:Speakers: Bruschi Marco (CERN)\nThe LUXE experiment aims at st udying high-field QED in electron-laser and photon-laser interactions\, wi th the 16.5 GeV electron beam of the European XFEL and a laser beam with p ower of up to 350 TW. The experiment will measure the spectra of electrons \, positrons and photons in expected ranges of $10^{−3}$ to $10^{9}$ per 1 Hz bunch crossing\, depending on the laser power and focus. These measu rements have to be performed in the presence of low-energy high radiation- background. To meet these challenges\, for high-rate electron and photon f luxes\, the experiment will use Cherenkov radiation detectors\, scintillat or screens\, sapphire sensors\, as well as lead-glass monitors for backsca ttering off the beam-dump. A four-layer silicon-pixel tracker and a compac t electromagnetic tungsten calorimeter will be used to measure the positro n spectra. The layout of the experiment and the expected performance under the harsh radiation conditions will be presented. Particular attention wi ll be devoted to the sapphire sensors gamma beam profiler (GBP) which shou ld provide a 5 um precise Compton-scattered gammas beam profile width\, wh ich in turn\, will allow a 5% determination of the absolute laser field in tensity experienced by the electron beam. This performances is quite chal lenging\, given the high irradiation dose experienced by the GBP (about 1 MGy/year). The use of sapphire sensors in high energy physics experiments is quite novel\, and details will be given on the R&D performed until now to assess their performances in the harsh environment of the LUXE experim ent. \nThe experiment has received stage 1 critical approval (CD1) from th e DESY management and is about to publish its technical design report (TDR ). It is expected to start running in 2025/26.\n\nhttps://indico.tlabs.ac. za/event/112/contributions/3223/ LOCATION: Meeting Room 2.64 - 2.66 URL:https://indico.tlabs.ac.za/event/112/contributions/3223/ END:VEVENT BEGIN:VEVENT SUMMARY:Straw Tracker of the future Spin Physics Detector at NICA collider DTSTART;VALUE=DATE-TIME:20230905T150000Z DTEND;VALUE=DATE-TIME:20230905T152000Z DTSTAMP;VALUE=DATE-TIME:20260606T141530Z UID:indico-contribution-517-3089@indico.tlabs.ac.za DESCRIPTION:Speakers: Temur Enik (JINR)\nThe Spin Physics Detector (SPD) a t the NICA collider at JINR is being developed to measure the nucleon spin structure. Polarized proton and deuteron beams will collide at the centre -of-mass energy up to 27 GeV in the proton-proton collision mode\, with in stantaneous luminosity up to 1e32 Hz/cm2. Tracks of charged particles will be measured in the magnetic field of a superconducting magnet with straw- based tracking system. Besides of the track coordinate measurements\, the tracker will be used as a part of the particle identification system (PID) . The barrel part of the tracker will be made of thin-wall straw tubes pro duced with ultrasonic welding of a metallized PET foil. The straws have 1 cm diameter and will be assembled in self-supporting octants made of 31 do uble-layers\, resulting in total in ~25 000 readout channels. The tracker should have a good spatial resolution and provide measurements of the part icle ionization losses serving the PID. This implies a challenging require ment to the tracker readout electronics. In this talk we present several p ossible concepts of the readout electronics together with simulation of th e straw response compared to the test beam measurements.\n\nhttps://indico .tlabs.ac.za/event/112/contributions/3089/ LOCATION: Meeting Room 2.64 - 2.66 URL:https://indico.tlabs.ac.za/event/112/contributions/3089/ END:VEVENT BEGIN:VEVENT SUMMARY:Beam tracker system for the BM@N/NICA experiment DTSTART;VALUE=DATE-TIME:20230905T144000Z DTEND;VALUE=DATE-TIME:20230905T150000Z DTSTAMP;VALUE=DATE-TIME:20260606T141530Z UID:indico-contribution-517-2985@indico.tlabs.ac.za DESCRIPTION:Speakers: Sergey Sedykh (JINR)\nA new beam tracker system for BM@N experiment was developed and implemented in the recent experimental run with Xe beam. The tracker consists of three double sided silicon detec tors\, which determine beam ion trajectory in each event. Design parameter s of the system are driven by the requirements of the experiment: ability to operate in beams of light and heavy ions\, to cover relatively large tr ansverse width of the beam profile\, and to measure with sufficient accura cy the beam ion position and impact angle at the target. Each detector has 61x61 mm^2 active area\, 128 strips on each of the p+ and n+ sides (450 μm pitch)\, with orthogonal orientation of strips. The detectors are 175 μm thick\, placed in vacuum\, and positioned 1 m apart from each other al ong the beam direction. The front-end electronics of the detectors is deve loped based on ASIC VATA64HDR16.2 (IDEAS\, Norway) with large dynamic rang e (-20 pC / +50 pC). The read-out electronics is placed outside of vacuum and is not subject to radiation damage. The detailed characteristics o f the beam tracker detectors and front-end electronics are presented\, as well as operational performance of the system in the experiment with Xe be am.\n\nhttps://indico.tlabs.ac.za/event/112/contributions/2985/ LOCATION: Meeting Room 2.64 - 2.66 URL:https://indico.tlabs.ac.za/event/112/contributions/2985/ END:VEVENT BEGIN:VEVENT SUMMARY:The Silicon Vertex Detector of the Belle II Experiment DTSTART;VALUE=DATE-TIME:20230905T142000Z DTEND;VALUE=DATE-TIME:20230905T144000Z DTSTAMP;VALUE=DATE-TIME:20260606T141530Z UID:indico-contribution-517-2978@indico.tlabs.ac.za DESCRIPTION:Speakers: Abdul Basith Kaliyar ()\nIn June 2022 the data takin g of the Belle II experiment was stopped for the Long Shutdown 1 (LS1)\, w hich is primarily required to install a new two-layer DEPFET detector (PXD ) and upgrade components of the accelerator. The whole silicon tracker (VX D) will be extracted from Belle II\, then the outer four-layer double-side d strip detector (SVD) is split into its two halves to allow access for th e PXD installation. Then a new VXD commissioning phase will begin such tha t it will be ready to take data by the end of 2023. We describe the challe nges and status of this VXD upgrade. \nIn addition\, we report on the perf ormance of the SVD\, which has been operated since 2019. The high hit effi ciency and the large signal-to-noise are monitored via online data-quality plots. \nThe good cluster-position resolution is estimated using the unbi ased residual with respect to the track\, resulting in reasonable agreemen t with the expectations. A novel procedure to group SVD hits event-by-even t\, based on their time\, has been developed. Using the grouping informati on during reconstruction allows to significantly reduce the fake rate whil e preserving the tracking efficiency. \nSo far\, in the layer closest to t he I.P.\, the SVD average occupancy has been less 0.5%\, which is well bel ow the estimated limit for acceptable tracking performance. As the luminos ity increases\, higher machine backgrounds are expected and the excellent hit-time information in SVD can be exploited for background rejection. We have developed a method that uses the SVD hit-time to estimate the collisi on time (event-T0) with similar precision to the estimate based on the dri ft chamber. The execution time needed to compute SVD event-T0 is three ord ers of magnitude smaller\, allowing a faster online reconstruction that is crucial in a high luminosity regime. Furthermore\, the front-end chip (AP V25) is operated in “multi-peak” mode\, which reads six samples. To re duce background occupancy\, trigger dead-time and data size\, a 3/6-mixed acquisition mode\, based on the timing precision of the trigger\, has been successfully tested in physics runs.\nFinally\, concerning the radiation damage\, the SVD dose is estimated by the correlation of the SVD occupancy with the dose measured by the diamonds of the monitoring and beam-abort s ystem. Although the sensor current and the strip noise have shown a modera te increase due to radiation\, we expect the detector performance will not be seriously degraded during the lifespan of the detector.\n\nhttps://ind ico.tlabs.ac.za/event/112/contributions/2978/ LOCATION: Meeting Room 2.64 - 2.66 URL:https://indico.tlabs.ac.za/event/112/contributions/2978/ END:VEVENT BEGIN:VEVENT SUMMARY:Spin Physics Detector at the NICA accelerator complex DTSTART;VALUE=DATE-TIME:20230905T140000Z DTEND;VALUE=DATE-TIME:20230905T142000Z DTSTAMP;VALUE=DATE-TIME:20260606T141530Z UID:indico-contribution-517-2962@indico.tlabs.ac.za DESCRIPTION:Speakers: Alexander Korzenev (Joint Institute for Nuclear Rese arch)\nThe Spin Physics Detector (SPD) is designed as a universal 4$\\pi$ detector with advanced tracking and particle identification for studying t he spin structure of the proton and deuteron and other spin-related phenom ena. The detector will be installed at one of the two beam intersection po ints of the NICA collider\, which is currently at the final stage of const ruction at JINR. A luminosity of 10$^{32}$ cm$^{−2}$s$^{−1}$ can be ac hieved in collisions of pp beams at the maximum interaction energy of 27 G eV. Both longitudinal and transverse beam polarizations will be available. The SPD detector will be equipped with silicone vertex and straw-tube det ectors for tracking\, time-of-flight and Cherenkov systems for particle id entification\, an electromagnetic calorimeter\, and a range system for muo n identification. A solenoidal magnetic field of 1 T will be provided by a superconductive magnet. The presentation will give an overview of the evo lving detector design. The commissioning of the detector is divided into t wo stages. The data taking of the first stage is planned for the end of th is decade.\n\nhttps://indico.tlabs.ac.za/event/112/contributions/2962/ LOCATION: Meeting Room 2.64 - 2.66 URL:https://indico.tlabs.ac.za/event/112/contributions/2962/ END:VEVENT END:VCALENDAR