Conveners
Ageing phenomena: Ageing phenomena 1
- Florian Maximilian Brunbauer (CERN)
Ageing phenomena: Ageing phenomena 2
- Atsuhiko Ochi (Kobe University (JP))
Ageing phenomena: Ageing phenomena 3
- Anatoli Romaniouk (National Research Nuclear University MEPhI (RU))
Ageing phenomena: Ageing phenomena 4
- Piotr Gasik (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
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Mariana Petris (Horia Hulubei National Institute of Physics and Nuclear Engineering (RO))06/11/2023, 16:00Oral
The high counting rate MSMGRPC (Multi – Strip, Multi-Gap Resistive Plate Chamber) prototypes developed for the CBM experiment at FAIR, operated with C_2H_2F_4 and SF_6 based gas mixtures, showed in laboratory cosmic -ray tests a very good performance. Later on, the obtained results were confirmed in the in-beam tests with reaction products, in the high counting rate test the efficiency...
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Marco Poli Lener (INFN e Laboratori Nazionali di Frascati (IT))06/11/2023, 16:25Oral
The GEM detectors with pad readout have been installed in the Muon apparatus of the LHCb experiment, more precisely in the innermost region (R1) of the first muon station (M1) . The GEM detectors have been operated with Ar/CO$_2$/CF$_4$=45/15/40 gas mixture at a gain of about 4000 with an average particle flux of about 200 kHz/cm$^2$. During the RUN1 and RUN2, corresponding to about 440 days...
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Niels Tuning (Nikhef National institute for subatomic physics (NL))06/11/2023, 16:50Oral
The LHCb experiment is designed to study B-decays at the LHC, and as such is constructed as a forward spectrometer. The large particle density in the forward region poses extreme challenges to the subdetectors, in terms of hit occupancies and radiation tolerance.
To accurately and efficiently detect the charged decay particles in the high-density particle environment of the LHC the Outer...
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Aleksandra Radulovic (University of Belgrade (RS))06/11/2023, 17:15Oral
CMS CSC is a particular kind of Multi-Wire Proportional Chambers, or MWPC. Operation principle of MWPC is based on avalanche amplification of the primary charge in vicinity of a thin anode wire. The regions of avalanche development are microscopic areas of plasma, and plasma chemical reactions may lead to formation of deposit on the electrode surfaces of the MWPC, causing degradation of its...
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Mingyi Dong07/11/2023, 09:25Oral
As the main tracking detector of Beijing Spectrometer (BESIII), the multilayer drift chamber (MDC) is used to accurately measure the position and the momentum of the charged particles produced in e+ e- collisions at Beijing Electron-Positron Collider (BEPCII), and meanwhile to test dE/dx information for particle identification.
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MDC has been taking data since 2008. During about 15 years of... -
Dr Malte Hildebrandt07/11/2023, 09:50Oral
The MEG experiment (phase 1) at the Paul Scherrer Institute, searching for the charged lepton flavor violating decay mu -> e + gamma, took physics data from 2009 until 2013. The analysis of the combined data sample resulted in an upper limit of 4.2∙10E{-13} (90%CL) on the branching ratio that is still the most stringent limit on this decay to date.
The drift chamber system was designed to...
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Salvatore Di Carlo07/11/2023, 10:15Oral
FRIB is one of the premier rare-isotope beam facilities, with the capability of producing a majority (approximately 80 percent) of the isotopes predicted to exist from oxygen to uranium, and beam energies of 200MeV/u. With the increase in beam power from the present 5kW to the planned 400kW, FRIB experiments are about to enter a new era which requires the operation of particle detectors at...
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Ingo-Martin Deppner (Physikalisches Institut der Universität Heidelberg)07/11/2023, 16:00Oral
The future fixed target high-rate Compressed Baryonic Matter (CBM) experiment is one of the experimental pillars of the Facility for Antiproton and Ion Research (FAIR) located in Darmstadt/Germany. Since CBM aims to operate at an interaction rate of up to 10 MHz for Au+Au collisions radiation hard and high rate capable detector have to be installed. In order to provide an excellent particle...
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Dr Jeremie Alexandre Merlin (KCMS -Hanyang University & University of Seoul)07/11/2023, 16:25Oral
Like other gaseous technologies, GEM detectors can experience premature aging when operating in high-rate environments. This occurs when gas molecules dissociate and recombine within the plasmas generated during electron amplification, leading to the formation of large and complex polymers. These polymers can be deposited on the amplification structure and significantly impact the performance...
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Dr Jeremie Alexandre Merlin (KCMS -Hanyang University & University of Seoul)07/11/2023, 16:50Oral
GEM-based detectors are widely used in High Energy Physics (HEP) environments due to their inherent resistance to classical aging. Their unique design, which spreads charge amplification across multiple GEM holes and layers, effectively reduces the local plasma energy responsible for polymer formation, a major cause of detector aging. Consequently, GEM detectors are particularly advantageous...
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Masato Takahashi (Kobe University)08/11/2023, 16:00Oral
The MEG II experiment searches for the $\mu\to e\gamma$ decay which is charged lepton flavor violating process. A new type of resistive plate chamber (RPC) using diamond-like carbon (DLC) electrodes is under development for the identification of gamma ray from the radiative muon decay background, in the MEG II experiment. In order to identify the background, low energy positrons on the muon...
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Thiago Saramela (Universidade de Sao Paulo (BR))08/11/2023, 16:25Oral
The interest in using visible and near-infrared scintillation in Gas Electron Multipliers (GEMs) in experimental approaches based on optical readouts has grown recently. One gas mixture used for this purpose includes CF$_4$, which is known to cause etching in the interior walls of the GEM holes [1]. One question may arise: Where will this etched material be re-deposited? The question is...
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Christian Wendisch08/11/2023, 16:50Oral
The central tracking system of the HADES detector, installed at the SIS-18 synchrotron at GSI/Darmstadt (Germany), employs large-area, low-mass drift chambers. They are located in six identical sectors in forward direction of the fixed-target setup, two chamber planes before and two behind the toroidal magnetic field, respectively. Each chamber comprises six stereo angel wire layers. To...
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