Ms
Giada Rutar
(Paul Scherrer Institut Villigen and ETHZ)
5/27/15, 9:10โฏAM
S7 - Gas detectors
Poster
The MEG experiment has set the latest upper limit of $5.7\times10^{-13}$ (90\thinspace\% C.L.) on the branching ratio of the $\mu^{+}\rightarrow e^{+}\gamma$ decay, making use of the most intense continuous surface muon beam in the world at the Paul Scherrer Institut, Villigen. High resolutions in terms of energy, timing and relative opening angle are needed in the detection of the $e^{+}$ and...
Mr
Oliver Steffen
(Institut fรผr Kernphysik, Universitรคt Mainz)
5/27/15, 9:11โฏAM
S7 - Gas detectors
Poster
The Crystal Ball Collaboration uses the energy tagged photonbeam facility in Mainz, Germany, to study photo-induced reactions on nucleons and nuclei.
The Crystal Ball/TAPS $4\pi$ calorimeter setup is optimized for the
detection of neutral final states. Charged particles are identified and measured
by the inner detector system including a two layer MWPC. The increased rate of
charged...
Gianluigi Chiarello
(LE)
5/27/15, 9:12โฏAM
S7 - Gas detectors
Poster
Modern experiments for the search of extremely rare processes require high resolutions (order of 50-200 keV/c) tracking systems for particle momenta in the range of 50-300 MeV/c, which is totally dominated by multiple scattering contributions.
We present a newly developed construction technique for ultra-low mass, high granularity Drift Chambers fulfilling this goal. It consists of:
โข a...
Marco Grassi
(PI)
5/27/15, 9:13โฏAM
S7 - Gas detectors
Poster
A new cylindrical drift chamber for the MEG-II experiment is currently under construction.
The chamber is used to track low momentum positrons from the $\mu^+$ decays to search for $\mu^+ \rightarrow e^+ \gamma$ events.
The chamber is made of very small drift cells, placed in stereo configuration for longitudinal hit localisation and operated in a helium-isobutane gas mixtures. The use of...
Marco Venturini
(PI)
5/27/15, 9:14โฏAM
S7 - Gas detectors
Poster
Gaseous wire drift chambers are a common device for tracking charged particles to extract information on their momentum or type. A particle crossing a drift chamber cell produces several ionization clusters, but only the signal coming from the cluster which is closest to the anode wire is usually exploited to extract the impact parameter.
This introduces a bias, especially in tracking...
Riccardo Vari
(ROMA1)
5/27/15, 9:15โฏAM
S7 - Gas detectors
Poster
The architecture of the present trigger system in the ATLAS muon barrel was designed according to a reference luminosity of 10^34 cm^-2 s^-1 with a safety factor of 5, with respect to the simulated background rates, now confirmed by LHC Run 1 data. HL-LHC will provide a luminosity 5 times higher and an order of magnitude higher background. As a result, the performance demand increases, while...
Dr
Saikat Biswas
(National Institute of Science Education and Research), Mr
alhussain Abuhoza
(GSI)
5/27/15, 9:16โฏAM
S7 - Gas detectors
Poster
In high-rate heavy-ion experiments, gaseous detectors encounter big challenges in terms of degradation of their performance due to a phenomenon called ageing. A setup for high precision ageing studies has been constructed and commissioned at the GSI detector laboratory. Several improvements of the setup design and the gas system have been implemented to achieve the required accuracy of the...
Mr
Philipp Lรถsel
(Ludwig-Maximilians-Universitรคt Mรผnchen)
5/27/15, 9:17โฏAM
S7 - Gas detectors
Poster
Resisitve strip Micromegas detectors behave discharge tolerant. They have
been tested extensively as smaller detectors of about 10 x 10 cm^2 in size and they work reliably at high rates of 100 kHz/cm^2 and above. Tracking resolutions well below 100 um have been observed for 100 GeV muons and pions. Micromegas detectors are meanwhile proposed as large area muon precision trackers of 2-3m^2 in...
Dr
Ourania Sidiropoulou
(University of Wuerzburg)
5/27/15, 9:18โฏAM
S7 - Gas detectors
Poster
A Micromegas detector with four active layers, serving as prototypes for the upgrade of the ATLAS spectrometer, was designed and constructed in 2014 at CERN and represents the first example of a Micromegas quadruplet ever built.
The detector has been realized using the resistive-strip technology and decoupling the amplification mesh from the readout structure. The four readout planes host...
Ms
SHARMILI RUDRA
(University of Calcutta), Dr
Saikat Biswas
(National Institute of Science Education and Research)
5/27/15, 9:19โฏAM
S7 - Gas detectors
Poster
Gas Electron Multiplier (GEM) is one of the most important micro-pattern gaseous detectors used in the recent and being considered for future High-Energy Physics (HEP) experiments [1, 2]. For example ALICE at the Large Hadron Collider Facility is upgrading its multi-wire proportional chamber based Time Projection Chamber (TPC) with GEM units. In line with the worldwide efforts, we have also...
Mr
Mesut Arslandok
(Goethe University), Mr
Yalรงฤฑn Kalkan
(Uludaฤ University, Bursa)
5/27/15, 9:20โฏAM
S7 - Gas detectors
Poster
Avalanches in gas-based detectors using
$\mathrm{Ar}\mbox{-}\mathrm{CO}_2$ or
$\mathrm{Ne}\mbox{-}\mathrm{CO}_2$ as drift medium
produce in a first instance $\mathrm{Ar}^+$, $\mathrm{Ne}^+$ and $\mathrm{CO}_2^+$ ions.
Although there is a wealth of information in the literature about ion transport and ion chemistry,
some gas-detector simulations simplify the treatment of ions to...
Mr
Andreas Duedder
(Uni. Mainz)
5/27/15, 9:21โฏAM
S7 - Gas detectors
Poster
We report on the design and the performance of a prototype detector based on Micromegas technology with a pad readout geometry. The prototype detector consists of 500 pads covering an active area 10x10 cm. Each pad has a size of 6x4 mm and is connected to an individual readout channel. The design of this prototype and its associated readout infrastructure was developed such, that it can be...
Dr
Michele Cascella
(Universitร del Salento e INFN di Lecce)
5/27/15, 9:22โฏAM
S7 - Gas detectors
Poster
The SuperNEMO detector will search for neutrinoless double beta decay at the Modane Underground Laboratory with a sensitivity of |mฮฒฮฒ|<0.05รท0.1 eV; the detector design allows complete topological reconstruction of the event enabling excellent background rejection and, eventually, the ability to determine the nature of the lepton number violating process.
To prove the experiment feasibility,...
Prof.
Bernd Surrow
(Temple University)
5/27/15, 9:23โฏAM
S7 - Gas detectors
Poster
The recently completed Forward GEM Tracker (FGT) of the STAR experiment at RHIC took advantage of commercially produced GEM foils based on double-mask chemical etching techniques. With future experiments proposing detectors that utilize very large-area GEM foils such as the CMS muon detector upgrade and a future Electron-Ion Collider facility, there is a need for commercially available large...
Dr
Levan Glonti
(JINR)
5/27/15, 9:24โฏAM
S7 - Gas detectors
Poster
Microscope investigations of new-type thin-wall tubes (straws) produced for NA62 drift chambers revealed that they are semitransparent and allow anode wires to be observed under illumination by visible light. Positions of wires in straws and thus the anode spacing in the drift chamber can be directly determined with a high accuracy (~10 ยต) using a microscope mounted on a precision optical...
Ilaria Vai
(PV)
5/27/15, 9:25โฏAM
S7 - Gas detectors
Poster
The CMS Collaboration is evaluating Gas Electron Multiplier (GEM) chambers for the Upgrade of the High Eta region of the Muon System. Together with a rate capability fitting the extremely high particle rates expected in the forward regions, the use of GEM technology will lead to a significant improvement of tracking and triggering capabilities, muon identification and track reconstruction. The...
Luigi Benussi
(LNF)
5/27/15, 9:26โฏAM
S7 - Gas detectors
Poster
Fibre Bragg Grating (FBG) sensors have been so far mainly used in high energy physics as high precision positioning and re-positioning sensor and as low cost, easy to mount and low space consuming temperature sensors. FBGs are also commonly used for very precise strain measurements. In this work we present a novel use of FBGs as flatness and mechanical tensioning sensors applied to the wide...
Roberto Cardarelli
(ROMA2)
5/27/15, 9:27โฏAM
S7 - Gas detectors
Poster
Experiments at present and future hadron colliders stress timing as one of the most important detector parameters. Indeed the need to increase the collider luminosity can be achieved in principle either by decreasing the inter-bunch crossing time or by increasing the number of protons per bunch. The latter approach however can produce a dramatic event pile-up in the same bunch crossing.
We...
Alice Magnani
(PV)
5/27/15, 9:28โฏAM
S7 - Gas detectors
Poster
After the upgrades of the Large Hadron Collider planned for the second and the third Long Shutdown, the LHC luminosity will approach values like 2ร1034 cmโ2 sโ1 and 5ร1034 cmโ2 sโ1 respectively.
Such conditions will deeply affect the performance of the CMS muon system, especially in the very forward region, due to the harsh expected background environment and the reduced magnetic field. The...
Luca Galli
(PI)
5/27/15, 9:29โฏAM
S7 - Gas detectors
Poster
High energy physics experiments at the high intensity frontier place ever greater demands on detectors, and in particular on tracking devices. In order to compare the performance of many possible small size tracking prototypes, a high resolution cosmic ray tracker has been assembled to be used as an external track reference. It consists in an assembly of four spare ladders of the external...
Francesco Messi
(Physikalisches Institut, Uni-Bonn)
5/27/15, 9:30โฏAM
S7 - Gas detectors
Poster
A MRPC detector should be installed in order to cover the forward angle in the MAMBO experiment in Bonn where is used as TOF detector located at 1 m from the target. This detector use four sealed stacks in order to reach time resolution of the order of 30-40 ps.
First commissioning data is also showed.
Davide Pinci
(ROMA1)
5/27/15, 9:31โฏAM
S7 - Gas detectors
Poster
In last years, the development of optical sensors has produced objects able to provide very interesting performance. Large granularity is offered along with a very high sensitivity.
CMOS sensors with millions of pixels able to detect as few as two or three photons
per pixel are commercially available and can be used to read-out the optical signals
provided by tracking particle...
Martin Ljunggren
(Lund University)
5/27/15, 9:32โฏAM
S7 - Gas detectors
Poster
The ALICE collaboration plans major upgrades to its detectors for run 3 and 4 of the LHC. For the TPC, the upgrade is aimed at increasing the rate capability to record an expected collision rate of 50 kHz Pb-Pb collisions, which requires continuous readout.
The current TPC will therefore be reinstrumented with new Gas Electron
Multipliers (GEM) readout chambers that can suppress ~99% of the...
Hubert Kroha
(Max-Planck-Institut fuer Physik)
5/27/15, 9:33โฏAM
S7 - Gas detectors
Poster
The experience of the ATLAS muon spectrometer shows that drift-tube chambers provide highly reliable precision muon tracking over large areas. The ATLAS muon chambers are exposed to unprecedentedly high background of photons and neutrons induced by the proton collisions. Still higher background rates are expected at future high-energy and high-luminosity colliders beyond HL-LHC. Drift-tube...
Dr
maximilien chefdeville
(CNRS/IN2P3/LAPP)
5/27/15, 9:34โฏAM
S7 - Gas detectors
Poster
Micromegas, as a proportional and compact gaseous detector, can be used as an active medium in a sampling calorimeter.
Moreover, its readout plane can be finely segmented to perform Particle Flow reconstruction of jets at a future linear collider or high luminosity LHC experiment.
For this application, sparks that would result from the potentially very large ionisation released in the gas...
Estel Perez
(TRIUMF)
5/27/15, 9:35โฏAM
S7 - Gas detectors
Poster
For the forthcoming upgrade to the LHC, the first station of the ATLAS muon end-cap system needs to be replaced in 2018 and 2019 to retain the good precision tracking and trigger capabilities in the high background environment expected with the upcoming luminosity increase. In particular, the precision reconstruction of tracks requires a spatial resolution of about 100 um, and the Level-1...
Dr
Supriya Das
(Bose Institute)
5/27/15, 9:36โฏAM
S7 - Gas detectors
Poster
Electron multiplication in Gas Electron Multipliers (GEM) occurs when primary electrons pass through the small holes where the electric field is very high. However the shape of the electric field distribution through the holes depends on the shape and size of the holes as well as the thickness of the polyimide foil. In consequence the local variation of these parameters results in the...
Mr
Fabian Kuger
(CERN / University of Wรผrzburg)
5/27/15, 9:37โฏAM
S7 - Gas detectors
Poster
The fine, conductive meshes used in a Micromegas (MM) to divide drift and amplification regions contribute significantly to the signal formation processes. Systematic studies of the electron transparency and gain impact of different meshes in Micromegas are rare as in most MM applications the mesh is a fixed build-in component.
An Exchangable Mesh Micromegas (ExMe) consisting of separated...
Dr
Saikat Biswas
(National Institute of Science Education and Research)
5/27/15, 9:38โฏAM
S7 - Gas detectors
Poster
Triple GEMโs will be used to instrument the CBM muon detector MUCH (MUon CHamber). In the GSI detector laboratory an R and D effort has been performed to study the characteristics of both single and double mask GEM detectors. In this study, the gain and the energy resolution have been measured systematically employing an 55Fe source as a function of the voltages applied to the GEM foils. It...
Dr
Yury Potrebenikov
(JINR, Dubna)
5/27/15, 9:39โฏAM
S7 - Gas detectors
Poster
A 2150x2150 mm2 registration area drift chamber capable of working in vacuum is presented. Thin-wall tubes (straws) of a new type are used in the chamber. A large share of these 9.80 mm diameter drift tubes are made at Dubna from the metalized 36 ยตm Mylar film welded along the generatrix using the ultrasonic welding machine created at JINR. The main features of the chamber and some...
Mr
Vadim Babkin
(Joint Institute for Nuclear Research)
5/27/15, 9:40โฏAM
S7 - Gas detectors
Poster
The new full-scale prototype of the ToF detector for BM@N and MPD experiments was produced and tested. First time we use three stacks of glasses to make symmetrical construction to decrease dispersion and reflections of the sygnal on the long readout strip.
Dr
Claudio Ferretti
(University of Michigan)
5/27/15, 9:41โฏAM
S7 - Gas detectors
Poster
The Monitored Drift Tube (MDT) chambers of the ATLAS muon spectrometer demonstrated that they provide very precise and robust tracking over large areas. Goals of ATLAS muon detector upgrades are to increase the acceptance for precision muon momentum measurement and triggering and to improve the rate capability of the muon chambers in the high-background regions when the LHC luminosity...
Marco Maggiora
(TO)
5/27/15, 9:42โฏAM
S7 - Gas detectors
Poster
We are developing a cylindrical GEM detector with analog readout to upgrade the Inner Tracker of the BESIII experiment at IHEP (Beijing). The new detector will match the requirements for momentum resolution (ฯpt/Pt ~0.5% at 1 GeV) and radial resolution (ฯxy ~100ฮผm) of the existing drift chamber and will improve significantly the spatial resolution along the beam direction (ฯz ~150ฮผm) with very...
Mr
Marco Venturini
(PI)
5/27/15, 9:43โฏAM
S7 - Gas detectors
Poster
The MEG II experiment will search for the Lepton-Flavour-Violating decay of $\mu \to e \gamma$ with an expected sensitivity on the branching ratio of about
5$\times 10^{-14}$, ten times better than MEG.
In MEG II Michel positrons will be tracked by a single-volume cylindrical drift chamber, composed of 10 criss-crossing sense wire planes with alternating stereo angles of about $7^\circ$....
Dr
Yunus KAYA
(Uludag University)
5/27/15, 9:55โฏAM
S7 - Gas detectors
Poster
Whether intentionally or as contaminant, water is present in many gas-based detectors,owing to its low ionisation potential ($12.52~\mathrm{eV}$), water is ionised both by electron impact and by charge transfer.Ionised water reacts with neutral water molecules to form $\mathrm{H}_3\mathrm{O}^+$ hydronium ions which combine with further water molecules to form large $\mathrm{H}^+ \cdot...
