BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Position Measurement in single-gap RPCs using Timing-Difference fr om Two Ends of Pickup Strips in Differential Configuration DTSTART;VALUE=DATE-TIME:20230906T100000Z DTEND;VALUE=DATE-TIME:20230906T102000Z DTSTAMP;VALUE=DATE-TIME:20260906T153712Z UID:indico-contribution-520-3210@indico.tlabs.ac.za DESCRIPTION:Speakers: Jones Joy Panicker (HBNI\, TIFR)\nThis work explores a technique for extracting the position of particle along the direction o f a pickup strip\, in a large area single-gap Resistive Plate Chamber (RPC )\, by measuring the timing-difference from the two ends of the strip. Usi ng precise time-difference measurement\, the position can be obtained more precisely than the conventional x-y strip readout with the same number of electronics channels. This technique was reported in the case of multigap RPCs (MRPCs) in [1] with timing difference resolution of 18 ps correspond ing to position resolution of 1.7 mm\, with sensitivity of 104ps/cm. The s ensitivity is defined as the ratio of the change in mean of timing-differe nce to the change in position where the particle crosses the gas gap. Sens itivity is just twice the inverse of propagation speed in the transmissio n line formed by the pickup strips. In [1]\, the readout strips on either side of the MRPC are kept in parallel\, and the signals from both ends of the strip are read differentially to minimise noise. It is expected that t his method would work on single-gap RPCs also as the signal will be induce d to both sides of a strip simultaneously. The intrinsic fluctuations of t iming of the device is common to both ends of the strip and gets cancelled out when the timing-difference is taken (pulse height effect may bias the time measurements). However\, MRPCs which are operated at higher electric fields produce a sharper rising signal than the single-gap RPCs\, so the position resolution may not be as good for single-gap RPCs as in the case of MRPCs. A similar method has been tested on single-gap RPCs in [2] achie ving a position resolution of 10.69 mm (timing difference resolution of 15 0 ps)\, but this was done using single-ended signals with pickup strips mo unted only on one side of the RPC. Single-ended readout will limit the tim ing-difference resolution as compared to differential readout. A similar m ethod has been tested in the development of the Improved RPCs (iRPCs) in C MS [3] with a resolution of 16mm (160 ps timing-difference resolution)\, a nd in [4] with a resolution of 5mm. This work will present the development of readout electronics for differential readout of RPCs and the measureme nt of the timing-difference resolution and sensitivity of the RPC using a cosmic muon telescope.\n\n[1] MRPC-PET: A new technique for high precision time and position measurements K.Doroud et al\, Nuclear Instruments and M ethods in Physics Research A (2011) https://doi.org/10.1016/j.nima.2011.09 .008 \n\n[2] Studies on fast triggering and high precision tracking with R esistive Plate Chambers G. Aielli et al\, Nuclear Instruments and Methods in Physics Research A (2013) https://doi.org/10.1016/j.nima.2013.02.044 \n \n[3] Improved-RPC for the CMS muon system upgrade for the HL-LHC\nPriyank a Kumari et al. https://arxiv.org/abs/2005.11396\n\n[4] Double-end Readout Method Applied in RPC\nQ. Li et al 2021 JINST 16 P10036 https://iopscienc e.iop.org/article/10.1088/1748-0221/16/10/P10036\n\nhttps://indico.tlabs.a c.za/event/112/contributions/3210/ LOCATION: Meeting Room 2.44 - 2.46 URL:https://indico.tlabs.ac.za/event/112/contributions/3210/ END:VEVENT BEGIN:VEVENT SUMMARY:Advancing RPC Detectors with Alternative Eco-Friendly Gas Mixtures and Recuperation systems DTSTART;VALUE=DATE-TIME:20230906T094000Z DTEND;VALUE=DATE-TIME:20230906T100000Z DTSTAMP;VALUE=DATE-TIME:20260906T153712Z UID:indico-contribution-520-2960@indico.tlabs.ac.za DESCRIPTION:Speakers: Gianluca Rigoletti (CERN)\nResistive Plate Chamber ( RPC) detectors\, employed in the muon systems of CERN LHC experiments\, ar e operated with gas mixtures containing C2H2F4 (R-134a) and SF6\, both gre enhouse gases (GHGs) with a high global warming potential (GWP). Among str ategies developed by CERN Gas Team to reduce GHG emissions\, one branch is focused on studying alternative gas mixtures and one on recuperating gase s from gas mixtures used in the detectors. Firstly\, R-1234ze is investiga ted as a potential replacement for R-134a\, with additional tests explorin g the necessity of a fourth gas to maintain the same working point range a s R-134a based gas mixture. The performance of RPCs with R-1234ze was eval uated at different gamma rates in the presence of a muon beam at the CERN GIF++ facility by measuring efficiency\, streamer probability\, induced ch arge\, cluster size\, and time resolution. Secondly\, adding CO2 to the st andard gas mixture is studied as a mid-term solution to reduce R-134a usag e and decrease CO2-equivalent emissions by 15-20%. These gas mixtures were characterized using muon beams and gamma background at the GIF++ facility \, and an aging test is planned with the collaboration of EP-DT Gas team\, ATLAS\, and CMS RPC teams. This mid-term solution is particularly relevan t to the ATLAS RPC system\, as its leak rate disallows the use of a recupe ration system. The third strategy involves the development of an R-134a re cuperation system for the standard gas mixture\, with a prototype tested i n 2020-2021 and a production version under operation at CMS. This recupera tion system separates and recuperates R-134a from the standard gas mixture with an efficiency of approximately 80%\, allowing the recovered gas to b e reused and injected into the system.\n\nhttps://indico.tlabs.ac.za/event /112/contributions/2960/ LOCATION: Meeting Room 2.44 - 2.46 URL:https://indico.tlabs.ac.za/event/112/contributions/2960/ END:VEVENT BEGIN:VEVENT SUMMARY:Pixelised Resistive Micromegas for Tracking Detectors in Future Pa rticle Physics Experiments DTSTART;VALUE=DATE-TIME:20230906T092000Z DTEND;VALUE=DATE-TIME:20230906T094000Z DTSTAMP;VALUE=DATE-TIME:20260906T153712Z UID:indico-contribution-520-3106@indico.tlabs.ac.za DESCRIPTION:Speakers: Maria Teresa Camerlingo (University Napoli Federico II & INFN Napoli)\nIn this contribution\, we present a development of resi stive Micromegas (MM) technology to reach stable and efficient operation u p to particle fluxes of 10 MHz/cm2. This can be achieved with a pixelized detector using readout pads of a few mm2 area\, significantly reducing the occupancy of the readout elements. In the most recent prototypes (exploit ing double DLC layer)\, the resistive layer is continuous and uniform and the charge is evacuated through many dot-connections\, several mm apart. A n overview of the measured performance in terms of gain\, rate capability and recent results on time\, efficiency\, and spatial resolution from test -beam campaigns is reported for the latest small area prototypes. Differen t gas-mixtures have been tested and compared\, as well. \nMoving towards a larger scale\, a new detector with an active area of 400 cm2 has been bui lt\, implementing a double layer of DLC foils with a surface resistivity a round 30 MOhm/square. Results will be reported following laboratory and te st beam measurements.\n\nhttps://indico.tlabs.ac.za/event/112/contribution s/3106/ LOCATION: Meeting Room 2.44 - 2.46 URL:https://indico.tlabs.ac.za/event/112/contributions/3106/ END:VEVENT BEGIN:VEVENT SUMMARY:The drift chamber project for the Super Charm-Tau Factory detector DTSTART;VALUE=DATE-TIME:20230906T090000Z DTEND;VALUE=DATE-TIME:20230906T092000Z DTSTAMP;VALUE=DATE-TIME:20260906T153712Z UID:indico-contribution-520-2795@indico.tlabs.ac.za DESCRIPTION:Speakers: Dmitrii Kyshtymov ()\nThe Budker Institute of Nuclea r Physics is actively developing the Super Charm-Tau Factory (SCTF) projec t\, which is a mega-science class facility that will be used to study the decays of rare c-quarks and tau-leptons in Sarov\, Russia. A new drift cha mber to the SCTF detector is proposed consisting of 41 layers of hexagonal cells with an average radius of 7 mm in the He/C3H8 gas mixture. The task s of the tracking system are to provide efficient reconstruction of charge d particles\, to determine their momentum and to identify their type by me asuring ionization energy losses. To obtain more isotropic isochrones insi de the cells a wire structure optimization algorithm was performed. A mome ntum resolution was simulated\, for pions with an energy of 1 GeV it is eq ual to 0.35%.\n\nThe spatial resolution was measured at various gas amplif ications on a drift chamber small prototype consisting of 7 hexagonal cell s. The average spatial resolution is less than 100 mkm.\n\nhttps://indico. tlabs.ac.za/event/112/contributions/2795/ LOCATION: Meeting Room 2.44 - 2.46 URL:https://indico.tlabs.ac.za/event/112/contributions/2795/ END:VEVENT END:VCALENDAR