9-12 February 2010
GSI Helmholtzzentrum für Schwerionenforschung GmbH
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Contribution List

Displaying 77 contributions out of 77
The roughness of the inner surface of resistive plates plays an important role on the performance of RPC. A Monte Carlo simulation method has been developed for the trigger RPC operating in avalanche mode. Propagation of charged particles through the RPC gas, generation of electrons and their multiplication as well as the saturation and induction [1] are implemented. Experimental data will be com ... More
Presented by Ms. Tapasi GHOSH on 11 Feb 2010 at 12:10 PM
Session: Poster session
The NeuLAND detector for R3B at FAIR will detect high‐energy neutrons and will be based on timing resistive plate chambers. Current RPC detectors for timing purposes often use a common gas mixture, composed of 85% Reclin‐134a, 10% sulfur hexafluoride, and 5% isobutane, which allows the operation of the detector under optimal conditions. Each gas has a series of advantages and disadvantages, wh ... More
Presented by Mr. Dominic ROSSI on 10 Feb 2010 at 5:00 PM
The concept of a general purpose Trigger Readout Board (TRB) had its source in the future needs of the HADES (High Acceptance Di-Electron Spectrometer). The HADES is a running experiment, installed at the SIS-18 synchrotron (GSI, Germany). Next years HADES will be moved to the upcoming FAIR accelerator complex. Here, HADES-at-FAIR will continue its experimental program. Due to mentioned plans, the ... More
Presented by Mr. Marek PALKA on 12 Feb 2010 at 11:50 AM
The response of RPC detectors is highly sensitive to environmental parameters. A novel approach is presented to model the response of RPC detectors in a variety of experimental conditions. The algorithm, based on neural networks, has been developed and tested on the CMS RPC gas gain monitoring system during operation at the scaled-down prototype recirculation gas system.
Presented by Mr. Stefano COLAFRANCESCHI on 12 Feb 2010 at 9:00 AM
The time-of-flight (TOF) system of CBM experiment is proposed to be assembled of multi-gap resistive plate chambers (MRPCs). This system should have a counting rate capability up to 20 kHz/cm2. Usage of low-resistivity glass is a promising way of improving the MRPC rate capability. To address this issue, we produced special silicate glass with bulk resistivity in the order of 10e10Ωcm and tested ... More
Presented by Dr. Jingbo WANG on 10 Feb 2010 at 11:50 AM
Session: New applications
The Resistive Plate Chamber (RPC) concept for time of flight positron emission tomography (RPC-PET) is based on the converter-plate gamma detection principle and takes advantage of the naturally layered structure of RPCs, of its simple and economic construction, excellent time resolution and very good intrinsic position accuracy. These characteristics may be of interest for the detailed imaging of ... More
Presented by Mr. Miguel COUCEIRO on 11 Feb 2010 at 9:00 AM
Detailed studies on the behavior of ATLAS RPCs have been performed during last year of commissioning by using cosmic rays data and the first proton-proton collisions at 450 GeV. Detector parameters like the environment variables (temperatures, pressures, gas mixture) or other working parameters (high voltage levels, front-end discriminating thresholds, pull-down currents) have been used to optimi ... More
Presented by Dr. Marcello BINDI on 9 Feb 2010 at 12:30 PM
Session: New applications
Recent progress in the production of high-quality ‘electronic grade’ diamond materials by Chemical Vapour Deposition (CVD) processes enables the development of timing detectors for charged particles of unprecedented time resolution and rate capability. We present the characteristic properties of the three most relevant undoped diamond types for detector applications, which are single crystal C ... More
Presented by Mrs. Elèni BERDERMANN on 11 Feb 2010 at 10:40 AM
Following the invention of the Resistive Plate Chamber (RPC) more than 29 years ago1, RPC systems with two major types of Bakelite electrodes have been used in L3 and BaBar, and are presently being used by CMS, ATLAS, STAR, ALICE ToF, and a variety of cosmic ray and neutrino experiments, such as ARGO-YBJ, OPERA and Daya Bay. In recent years the BESIII Muon group of IHEP (Beijing), together with G ... More
Presented by Mr. Changguo LU on 12 Feb 2010 at 9:40 AM
In the ARGO-YBJ experiment, the charge readout is performed on two Big Pads equipped in each RPC to measure the charged particle density of the shower front up to 104/m2, enabling the study of primaries with energies in the "Knee" region. It's the first time for RPCs being used this way. To calibrate the number of charged particles injected on one RPC versus its charge readout, a telescope is setu ... More
Presented by Dr. Xiangdong SHENG on 9 Feb 2010 at 4:10 PM
For the most forward, high rate environment, region of Compressed Baryonic Matter experiment at the future Facility for Antiproton and Ion Research in Darmstadt the installation of timing Resistive Plate Chambers (RPC) is under consideration. Prototype timing RPCs have been developed at Forschungszentrum Dresden-Rossendorf (FZD). RPC electrodes with volume resistivity of about 10^9 Ω⋅cm are pr ... More
Presented by Dr. Lothar NAUMANN on 10 Feb 2010 at 12:10 PM
The work presented here describes the characterization of double gap, bakelite RPCs for the end-cap region of the “Compact Muon Solenoid” experiment at LHC, which were built, assembled and tested in India, before their dispatch to CERN in 2008. These detectors consisted of eight of RE*/2 and two of RE*/3 type geometry for the CMS. The RE*/2 detectors had gas-gaps made at KODEL, Korea and t ... More
Presented by Dr. Lalit PANT on 9 Feb 2010 at 5:20 PM
The CMS Resistive Plate Chambers (RPC) system consists of 912 double-gap chambers. The challenging constrains on the design and operation of this system imposed the development of a complex Detector Control System to assure the operational stability and reliability of a so large and complex detector and trigger system . The final layout and functionality of the CMS RPC DCS as well as the operation ... More
Presented by Dr. Giovanni POLESE on 9 Feb 2010 at 2:30 PM
The forward Muon Spectrometer of the ALICE experiment aims at investigating the properties of strongly interacting matter at the extreme energy density reached in heavy ion collisions at LHC. The trigger system of the Muon Spectrometer, called Muon Trigger, consists of four planes of RPC (Resistive Plate Chamber) detectors with a total area of 140 m2, 21k frontend channels and fast-decision electr ... More
Presented by Mr. Aurelien BLANC on 9 Feb 2010 at 3:30 PM
The trigger for the ALICE muon spectrometer will be issued by 72 single-gap, low resistivity bakelite RPCs, arranged in two stations of two planes each. The area covered by one plane is 5.5x6.5 m2. In order to operate RPCs both in streamer and avalanche mode, two dierent gas mixtures have been developed. After installation in the ALICE experimental hall, the detectors have undergone a two year co ... More
Presented by Dr. Martino GAGLIARDI on 9 Feb 2010 at 10:20 AM
Session: New applications
We report on the development of a Digital Hadron Calorimeter (DHCAL), built with Resistive Plate Chambers (RPCs) and 1 x 1 cm^2 readout pads as the active medium, for use in a detector optimized for the application of Particle Flow Algorithms to the measurement of jet energies. We present the concept and design of a DHCAL and report on the progress in constructing a prototype DHCAL which is abou ... More
Presented by Dr. Lei XIA on 11 Feb 2010 at 10:00 AM
The India-based Neutrino Observatory (INO) colllaboration is planning to build a massive 50kton magnetised iron calorimeter (ICAL) detector using glass RPCs as active detector elements. A stack of 12 such glass RPCs of 1m x 1m in area are tracking cosmic ray muons over the last two years. In this paper, we will review the performance of the RPCs using this cosmic ray data collected so far.
Presented by Prof. Naba MONDAL on 9 Feb 2010 at 6:20 PM
Preliminary tests of the ALICE Time-Of-Flight (TOF) system components, built of numerous MRPC strips, were not possible with beam particles and extensively involved cosmic measurements. For this purpose, a Cosmic Ray Test Facility (CRTF) was specially constructed, built and put into action at CERN. It represents a two-layer telescope of Scintillation Tiles with MRS APD Light Readout, provides 100% ... More
Presented by Mr. Dmitry MALKEVICH on 10 Feb 2010 at 10:40 AM
The efficiency of recovery achieved by open or closed loop extraction of RPC exhaust gases is in the range of 90% to 95% under optimum conditions. For a large detector setup operating on one volume change per day basis, a 5% loss amounts to discharging 50 kg of R134a and 0.5 kg of SF6 into atmosphere every day. The emissions are equivalent to creating nearly 50,000 m3 of Carbon dioxide daily. Gas ... More
Presented by Mr. Avinash JOSHI on 12 Feb 2010 at 10:00 AM
Muon detection plays a key role at the Large Hadron Collider. Resistive Plate Chambers (RPC) provide the barrel region of the ATLAS detector with an independent muon trigger as well as a twocoordinate measurement. The chambers, arranged in three concentric layers, are operated in a strong magnetic toroidal field and cover a surface area of about 4000 m2. The RPC Detector Control System is require ... More
Presented by Dr. Alessandro POLINI on 9 Feb 2010 at 12:10 PM
Session: Poster session
One of the most significant goals of swarm physics is determination of the charged particle scattering cross sections based on the available, transport data, such as drift velocity (W) and effective transverse characteristic energy (DT /μ). The first coefficient is the most sensitive to the elastic momentum transfer cross section, and the latter to the energy balance. This fact enables us to reno ... More
Presented by Jaime DE URQUIJO on 10 Feb 2010 at 5:00 PM
The India-based Neutrino Observatory (INO) colllaboration is planning to build a massive 50kton magnetised iron calorimeter (ICAL) detector to study atmospheric neutrinos. About 30,000 2m x 2m size glass RPCs will be used as active detector elements. Starting with a small 30cm x 30cm size RPCs, we have now started developing full size 2m x 2m RPCs. The production method for this large size RPCs a ... More
Presented by Mr. Satyanarayana BHEESETTE on 9 Feb 2010 at 6:00 PM
High resolution readout electronics is under development for MRPC detectors. It consists of a fast front‐end ASIC and an ultra high resolution TDC based on FPGA. The front‐end ASIC, CAD (Current Amplifier and Discriminator), works in fully current mode. Signal pulses are amplified by a current mirror with local negative feedback to reduce the input impedance and then are sent to a current comp ... More
Presented by Dr. Zhi DENG on 12 Feb 2010 at 12:30 PM
R3B, FAIR collaboration aims to measure four momentum vectors of kinematical complete reaction products from relativistic radioactive nuclei. To achieve energy resolution around 50 KeV (dE<50 KeV) for invariant mass of exotic nuclei above neutron threshold, a high energy neutron detector (1Gev<=En=>200MeV ) with very good timing resolution (Dt~100 ps) and position resolution (Dx, Dy, Dz ~1 cm) wil ... More
Presented by Prof. Ushasi DATTA PRAMANIK on 10 Feb 2010 at 3:50 PM
We report on the performance of the FOPI Time-of-Flight (ToF) Barrel in a Heavy-Ion (HI) collision experiments. The Barrel is made out of Multi-strip Multi-Gap Resistive Plate Counters (MMRPC), where each counter has 16 strips with the pitch of 2.54 mm. Strips are 90 cm long and read out from both sides. With such system we have repeatedly obtain the ToF resolution better than 95 ps. The features ... More
Presented by Dr. Mladen KIŠ on 10 Feb 2010 at 10:00 AM
In 2005 the GSI ASIC design group started with an evaluation of different TDC core architectures for a high resolution TDC for the CBM Time of Flight detector. Based on this evaluation a high resolution TDC fitting to the ambitious requirements of the CBM experiment was developed. Now with the GSI Eventdriven TDC with 4 channels (GET4) ASIC a prototype is available with a time resolution of bette ... More
Presented by Dr. Holger FLEMMING on 12 Feb 2010 at 12:10 PM
Presented by Prof. Rinaldo SANTONICO on 9 Feb 2010 at 9:20 AM
Session: Poster session
Here we present the methods for the estimation of L1 trigger effciency of RPC detector placed in the muon chamber of CMS experiment. Two independent methods, Tag&Probe and DTvsRPC, have been tested for RPC trigger eficiency measurement using cosmic muon data and Monte-Carlo cosmic muon sample. The cosmic muon data is collected during Cosmic Run At Full Tesla (CRAFT08) during the year 2008 using CM ... More
Presented by Ms. Monika JINDAL on 10 Feb 2010 at 5:00 PM
The CMS muon system consists of three gaseous detectors with complementary features: the Drift Tubes chambers (DT) in the barrel and the Cathode Strips Chambers in the endcaps provide good spatial resolution and the Resistive Plate Chambers (RPC) have an excellent time resolution. These three detectors provide muon trigger for the hardware Level-1 trigger. The informations transmitted from the thr ... More
Presented by Ms. Archana SHARMA on 9 Feb 2010 at 3:10 PM
A large-area (50 m^2) Time of Flight system has recently beeninstalled in the STAR Experiment at RHIC. The detectors are Multigap Resistive Plate Chambers (MRPCs) and are digitized using custom electronics based on the CERN "NINO" and "HPTDC" chips. Several different prototype systems were built and operated in STAR from 2003 to 2005. The design and performance of the prototypes, as well as the ~ ... More
Presented by Prof. William J. LLOPE on 10 Feb 2010 at 9:20 AM
Session: Poster session
Prototypes for the NeuLAND detector have been built at FZD and GSI and then studied using the 32MeV pulsed electron beam at the superconducting electron accelerator ELBE in Dresden, Germany. Owing to the new, single-electron per bunch mode of operation, a rapid validation of the design criteria (>=90% efficiency for minimum ionizing particles, s_t <= 100 ps time resolution) was possible. Tested p ... More
Presented by Mr. Dmitry YAKOREV on 10 Feb 2010 at 5:00 PM
Session: Poster session
A detector for momentum measurement of high-energy neutrons in the energy range 0.2 - 1 GeV is being developed for the R3B (Reactions with Relativistic Radioactive Beams) experiment at FAIR. Based on the running LAND detector at GSI, NeuLAND will consist of a layered structure made of iron converters, to convert neutrons mainly to protons, and multigap resistive plate chamber (MRPC) detectors in o ... More
Presented by Christoph CAESAR on 10 Feb 2010 at 5:00 PM
The NeuLAND detector at the R3B experiment at FAIR aims to detect fast neutrons (0.2-1.0GeV) with high time and spatial resolutions (sigma_t<100 ps, sigma_x,y,z<1 cm). The detector will consist of about 60 subsequent MRPC stacks containing a 4mm thick anode made of iron converter material, with an additional 4mm of converter material between two stacks. The secondary charged particles stemming fr ... More
Presented by Dr. Daniel BEMMERER on 10 Feb 2010 at 3:30 PM
RPCs are widely used in the present LHC experiments, with gas mixtures usually made out of C2H2F4/i-C4H10/SF6 (the "standard mixture"). RPCs assure a nice overall performance, with efficiencies greater than 95%, time resolution of the ns order, and rate capability reaching 1kHz/cm2. However, the standard mixture presents some drawbacks. As a first point, RPCs reach maximum efficiency at voltages ... More
Presented by Prof. Marcello ABBRESCIA on 12 Feb 2010 at 10:20 AM
Resistive Plate Chambers (RPC) were installed in the barrel region of ATLAS detector to provide the muon trigger (and a coarse measure of the “non-bending” phi coordinate) in the region |eta| < 1.05. The RPC are gaseous detector which measure the muon trajectory with 3 cm strips in the bending plane (r-z) and in the orthogonal direction (r-phi) with few nanoseconds time resolution. The trigger ... More
Presented by Mr. Angelo GUIDA on 9 Feb 2010 at 12:50 PM
We report a development of oiled multi-gap RPCs for high-rate particle triggers in high-energy physics experiments. RPCs with higher rate capability is promising, especially, for effective muon triggers at the RE1/1 region of the CMS in the LHC experiment. In this study, we designed and built two six-gap prototype RPCs made of 1-mm thick melamine-based high pressure laminated (HPL) resistive plate ... More
Presented by Prof. Kyong Sei LEE on 9 Feb 2010 at 5:00 PM
Resistive Plate Chambers (RPCs) thanks to their high time resolution (~1 ns), a suitable space resolution (~1 cm) and the low production cost (~25 €/m2) are widely employed for the muon trigger system at the Large Hadron Collider (LHC) experiments where they are covering a surface of about 4000 m2 (16 m3 of gas volume) both in ATLAS and in CMS. The large detector volume and the use of a relative ... More
Presented by Mr. Roberto GUIDA on 12 Feb 2010 at 10:40 AM
OPERA is an experiment dedicated to the observation of numu into nutau oscillations through tau appearance on the CNGS beam. The experiment is composed by two identical super-modules, each with a target section (made of emulsion/lead bricks alternated to a scintillator Target Tracker) and a muon spectrometer (instrumented with bakelite RPCs and drift tubes). The RPCs are operated in streamer mode ... More
Presented by Dr. Alessandro PAOLONI on 9 Feb 2010 at 11:30 AM
Session: Poster session
We have observed the performance of the multigap RPC in streamer and avalanche mode. The multigap RPC was designed to have improved time resolution compared to the single gap RPC. For this reason, we built five type of multigap RPC with a rectangular shape of glass electrode, size of 10 x 10 cm2 and thickness of 1 and 2 mm. Multigap RPCs were operated with gas mixture of Ar, C4H10, C2H2F4 and SF6 ... More
Presented by Mr. Masayoshi SHOJI on 10 Feb 2010 at 5:00 PM
The ATLAS detector is now installed at CERN’s LHC and fully operational. RPCs provide the first-level muon trigger and the measurement of the non bending coordinate in the barrel region. To achieve these goals, a system of about 4000 gas gaps operating in avalanche mode was built (resulting in a total of ~ 350000 readout strips). Such a large-scale system allows the study of the performance of ... More
Presented by Mr. Giordano CATTANI on 9 Feb 2010 at 9:40 AM
An open loop gas recovery and recirculation system has been developed for the INO RPC system. The gas gas mixture coming from RPC exhaust is first desiccated by passing through molecular sieve (3Å + 4Å). Subsequent srubbing over basic active alumina removes toxic and acidic contaminants. The Isobutane and Freon are then separated by diffusion and liquefied by fractional condensation by cooling ... More
Presented by Mr. Suresh KALMANI on 12 Feb 2010 at 11:30 AM
During the months of july-september 2009 CMS has taken data from cosmic particles keeping the magnetic field on. This data taking was called Cosmics Runs At Four Tesla (CRAFT). CRAFT 2009 was a chance to measure the flexibility and the stability of the Level 1(L1) Trigger of RPCs . The Pattern Comparator (PAC) is the RPC L1 Trigger algorithm : during CRAFT it was modified in order to be better sui ... More
Presented by Dr. Alberto Orso Maria IORIO on 9 Feb 2010 at 11:50 AM
High resistive bakelite RPCs, made with silicone compound coating, applied to the inner electrode surfaces, are studied in a cosmic ray test bench. The long term tests of the RPCs operated in streamer mode with gas mixture of Ar/isoC4H10/R-134a= 34/7/59 (mass ratio), show stable efficiency > 90% and time resolution ~ 2 ns (FWHM). Comparative studies of performance of the RPCs, made with different ... More
Presented by Mr. Saikat BISWAS on 9 Feb 2010 at 6:40 PM
The muon trigger upgrade of PHENIX includes the construction and installation of resistive plate chambers (RPCs) in the forward muon spectrometers and to upgrade the frontend electronics of the existing muon tracking chambers. About 300 gas gaps were produced, passed strict quality assurance procedures and are presently being assembled into RPC-1 and RPC-3 stations.Recently, the installation of s ... More
Presented by Prof. Sung PARK on 9 Feb 2010 at 5:40 PM
RPCs in Multi-strip fashion are widely regarded as very convenient designs for covering large areas under low track multiplicities. It will be shown, from the perspective of Multi-gap structures and high accuracy timing, how the strip impedance, weighting field profile and cross-talk are very important limiting factors of this kind of designs. Comparison of avalanche simulations with published dat ... More
Presented by Dr. Diego GONZALEZ-DIAZ on 10 Feb 2010 at 3:10 PM
Multi-gap resistive plate chambers (MRPCs) are planar gaseous detector made with resistive electrodes. Such detectors have good time resolution, high efficiency and low cost. These excellent characteristics, as well as the possible coverage of large areas, made MRPCs favorite detectors for high-granularity large-area time of flight (TOF) systems in modern nuclear and particle physics experiments, ... More
Presented by Prof. Yi WANG on 10 Feb 2010 at 11:30 AM
Many significant questions remain to be answered about the origin of the proton spin. A new fast Resistive Plate Chamber (RPC) based trigger system is being developed for the PHENIX muon spectrometer arms that will allow for the first time the measurement of the flavor structure of the quark polarization in the proton through the observations of W-bosons in polarized proton-proton collisions at th ... More
Presented by Prof. Rusty TOWELL on 9 Feb 2010 at 3:50 PM
Aging of glass RPCs has been extensively studied over the last years, with most authors referring effects such as an increase of dark counting rate, reduction of the counter efficiency and the appearance of deposits over the electrodes surfaces. Previous studies have shown that the deposit on both glass electrodes (cathode and anode) is essentially formed by olygomers of tetrafluoroethylene and ... More
Presented by Ms. Sílvia GRAMACHO on 10 Feb 2010 at 12:50 PM
In this work we present results concerning the ground-level cosmic ray test, prior to the final installation and commissioning of the new Resistive Plate Chamber (RPC) Time of Flight (TOF) wall for the High-Acceptance DiElectron Spectrometer (HADES) spectrometer at GSI [1]. The TOF wall is composed of six equal sectors, each one constituted by 187 individual 4-gaps glass-aluminum shielded RPC cel ... More
Presented by Mr. Alberto BLANCO CASTRO on 10 Feb 2010 at 9:40 AM
The performances of RPCs are strictly correlated with the FE Electronics parameters. The prompt charge signal, picked-up on read-out electrodes, has shape and amplitude which depend on the gas mixture, on the applied electric field and on the gas gap width. The best working point of the detector, which minimize the aging and optimize the time resolution, efficiency and rate capability, is strong ... More
Presented by Dr. Roberto CARDARELLI on 11 Feb 2010 at 11:50 AM
Simulation of development of a signal in an RPC is presented using simultaneous solution of transport equations for electrons, negative and positive ions. The model also includes space charge effect of all charged particles by Poisson equation. The equations are numerically solved using the Lax finite difference scheme. The simulation can well produce three modes of operation of RPC, i.e. avalanch ... More
Presented by Dr. Ahmad MOSHAII on 11 Feb 2010 at 11:30 AM
The PHENIX experiment is located at the Relativistic Heavy Ion Collider at Brookhaven National Laboratory on Long Island, New York. RHIC collides heavy ion beams at energies up to sqrt(sNN) = 200 GeV and proton beams at energies up to sgrt(s) = 500 GeV. One of the major physics goals at RHIC is the exploration of the origin of proton spin. RHIC provides the unique capability of accelerating polar ... More
Presented by Dr. Young Jin KIM on 9 Feb 2010 at 10:40 AM
The ARGO-YBJ air-shower array is composed of 1836 Resistive Plate Chambers operated instreamer mode, with a total sensitive area of about 6400 m2. The experiment, with its complete layout, has been running almost uninterruptedly since October 2007. The main working features of the detector, namely the operating current of each gas volume, atmospheric pressure, temperature and relative humidity, mo ... More
Presented by Dr. Paolo CAMARRI on 9 Feb 2010 at 2:50 PM
Session: New applications
Recently developed micropattern gaseous detectors offer high position resolution, excellent rate characteristics and good time resolutions. However the fine structure of their metallic electrodes makes them very fragile and easily destroyable by occasional sparks. Our presentation will consist from two parts. In the first one we will review the latest efforts made from various groups to imple ... More
Presented by Prof. Vladimir PESKOV on 11 Feb 2010 at 9:40 AM
A new Resistive Plate Chamber (RPC) based fast muon trigger system has been developed and partially installed in the PHENIX experiment. This new trigger will allow the PHENIX data acquisition system to efficiently sample high pT (> 20 GeV/c) muons from W decays in polarized proton+proton collisions at ps = 500 GeV at the Relativistic Heavy Ion Collider at Brookhaven National Laboratory. This meas ... More
Presented by Prof. Xiaochun HE on 12 Feb 2010 at 9:20 AM
The detection setup of the R3B experiment in the FAIR facility includes time of flight (ToF) walls, dedicated to the isotopic identification of ions of any charge and mass at energies of some hundreds AMeVs. The experiments related to heavy ions require large active surfaces and a very demanding time resolution (<50 ps) for the ToF detectors in order to accomplish with their duties with reasonable ... More
Presented by Dr. Enrique CASAREJOS on 10 Feb 2010 at 4:10 PM
Session: Poster session
The detection setup of the R3B experiment in the FAIR facility includes time of flight (ToF) walls, dedicated to the isotopic identification of ions of any charge and mass at energies of some hundreds AMeVs. The experiments related to heavy ions require large active surfaces and a very demanding time resolution (<50 ps) for the ToF detectors in order to accomplish with their duties with reasonable ... More
Presented by Dr. Enrique CASAREJOS on 10 Feb 2010 at 5:00 PM
Session: Poster session
The CMS RPC muon detector utilizes a gas recirculation system (Closed Loop) to cope with high gas mixture volumes and costs. A systematic study of Closed Loop gas purifiers has been carried out in 2008 and 2009 at the ISR experimental area of CERN, with the use of RPC chambers with currents monitoring, and gas analysis sampling points. Results on contaminants release and purifier characterization.
Presented by Dr. Giovanna SAVIANO on 10 Feb 2010 at 5:00 PM
The commissioning of the Time-of-Flight (TOF) detector of ALICE has been carried out and the apparatus is presently fully operational. With a high-statistics calibration the detector is expected to provide pi/K and K/p identification up to a momentum of 2.5 GeV/c and 4.0 GeV/c respectively for charged particles. The Multigap Resistive Plate Chambers (MRPC) are the base element of ALICE TOF de ... More
Presented by Dr. Daniele DE GRUTTOLA on 10 Feb 2010 at 10:20 AM
Session: New applications
Multi-gap Resistive Plate Chamber(MRPC), which is first developed in high energy physics experiments with excellent time discrimination, is also highlighted in imaging applications. In our lab a set of 50cm×50cm MRPCs were successfully developed and several experiments have been done to test the performance. Cosmic ray muons were used and proper high voltage and operating gas were chosen. Data an ... More
Presented by Prof. Qian YUE on 11 Feb 2010 at 9:20 AM
Session: Poster session
A kind of two-dimension readout mode for the induced signal readout of MRPC has been studied in both simulation and experiments. Several MRPC prototypes are produced and a series of test experiments have been done to compare with the result of simulation, in order to verify the simulation model. The experiment results are in line with those of simulation. This method will be used to design the two ... More
Presented by Dr. Yu-Cheng WU on 10 Feb 2010 at 5:00 PM
Session: Poster session
The RPC timing properties are determined by the maximum ionization rate that can be sustained while keeping the streamer fraction at modest values. This last characteristic, resilience to streamers, cannot today be fully calculated, calling for an experimental approach. In this work we systematically study the influence of a range of gas mixtures on the performance (background counting rate, effi ... More
Presented by Dr. Luís LOPEZ on 10 Feb 2010 at 5:00 PM
Session: Poster session
Timing RPCs are very interesting detectors that provide outstanding timing resolution and fast response at an affordable price to cover big surfaces. These features put together with the TimTrack reconstruction algorithm and an electronic chain composed by a FEE amplifying and digitizing electronics and an intelligent data acquisition board ( opens the possibility of developing an innovative dete ... More
Presented by Mr. Georgy KORNAKOV on 10 Feb 2010 at 5:00 PM
Session: Poster session
In the framework of detector development efforts worldwide, there is an increasing demand for a rapid and reliable way of testing timing RPC’s regarding their efficiency and time resolution. One possible avenue to reach this goal is to employ pulsed electron beams of several tens of MeV energy, which are close to the minimum of ionization. The timing response can then be measured with the accele ... More
Presented by Mr. Daniel STACH on 10 Feb 2010 at 5:00 PM
Session: New applications
In the context of developing a hadron calorimeter with extremely fine granularity (for the application of Particle Flow Algorithms to the measurement of jet energies at a future lepton collider), we report on extensive tests of a small scale prototype calorimeter. The calorimeter contained up to 10 layers of Resistive Plate Chambers with 2560 1 x 1 cm^2 readout pads, interleaved with absorber plat ... More
Presented by Dr. Jose REPOND on 11 Feb 2010 at 10:20 AM
The Compressed Baryonic Matter spectrometer (CBM) is expected to be operational in year 2015 at the Facility for Anti-proton and Ion Research (FAIR) in Darmstadt, Germany. The spectrometer aims at systematically studying rare and bulk probes stemming from heavy ion reactions in the energy regime 2-90GeV, in order to precisely characterize the phase diagram of nuclear matter and eventual first or s ... More
Presented by Mr. Ingo DEPPNER on 10 Feb 2010 at 2:50 PM
The Resistive Plate Chambers are used in the CMS experiment as a dedicated muon trigger both in barrel and endcap system. About 4000 square meter of double gap RPCs have been produced and have been installed in the experiment since 2007. The full barrel system and a fraction of the endcaps have been extensively commisioned with milions of cosmic rays collected by the full CMS experiment. Making us ... More
Presented by Mr. Camilo CARRILLO on 9 Feb 2010 at 10:00 AM
The ALICE Time-Of-Flight (TOF) detector is a cylindrical array with a total area of around 150 m2 and more than 150000 readout channels, covering the whole barrel region; it will identify pions and kaons up to 2.5 GeV/c and protons up to 4 GeV/c extending the ALICE PID capabilities to higher momenta. This performance requires a total time resolution of about 100 ps which is achieved by means of th ... More
Presented by Dr. Andrea ALICI on 10 Feb 2010 at 9:00 AM
Session: Poster session
The Control and Monitoring System designed for the Front-End Electronics of the HADES RPC detector, installed at GSI Helmholtzzentrum für Schwerionenforschung GmbH (Darmstadt, Germany), is described. The slow control system controls/monitors about 6500 variables and is being implemented using the Experimental Physics and Industrial Control System (EPICS) Software tool kit. A MEDM graphical interf ... More
Presented by Mr. Alejandro GIL ORTIZ on 10 Feb 2010 at 5:00 PM
TimTrack is a tracking algorithm to be used with timing detectors, being specially suitable to work with timing RPCs or fast scintillators. It is being developed in the framework of the Trasgo (TRAck reconStructinG mOdule) project aiming the development of a detector able to work stand-alone with full tracking and timing capabilities. TimTrack works directly with the primary information provided ... More
Presented by Prof. Juan A. GARZON on 11 Feb 2010 at 12:50 PM
The current absorbed by an RPC represents the sum of the charge delivered in the gas by the ionizing events interesting the gap, integrated by the electrodes time constant. This is typically of the order of tens of ms thus dominating the gas discharge time scale and characterizing the granular structure observed in the current signal. In most cases this structure is considered as noise to be fur ... More
Presented by Dr. Giulio AIELLI on 11 Feb 2010 at 12:30 PM
Next generation of experiments like CBM at FAIR will be confronted with the selection of rare probes in high multiplicity environment at collision rates up to 107 events/sec. Hadron identification in such a limiting environment is a real challenge and requires intensive R&D activity for developing high resolution and high granularity timing detectors at affordable cost. Recently, significant achie ... More
Presented by Dr. Mariana PETRIS on 10 Feb 2010 at 2:30 PM
Resistive Plate Chambers operating at high particle fluxes require the use of materials with a specific set of properties. At present it is believed that the dominant effect, for the case of sustained and homogeneous irradiation, is caused by the product of the plate thickness (d) times its resistivity (r) times the average charge per gap (q), as expected from the dynamic ohmic drop in a simple (s ... More
Presented by Mr. Miguel MORALES on 10 Feb 2010 at 12:30 PM
Session: Poster session
A 12 layer 1m x1m glass RPC stack is operational and collecting cosmic ray data for the last two years at TIFR. A VME based DAQ systeem with various graphical interfaces for data acquisition and monitoring has been developed. Both hardware and software aspects of this system will be discussed in this paper.
Presented by Mr. Samuel DEEPAK on 10 Feb 2010 at 5:00 PM
Session: Poster session
The India-based Neutrino Observatory (INO) collaboration is planning to build a glass RPC based magnetised iron calorimeter (ICAL). A prototype detector stack comprising of 12 RPCs of 1m x 1m in area is setup to track cosmic ray muons. In order to demonstrate its capability to distinguish between up-going and down-going particles, we measured the velocity of the cosmic muons recorded in this stack ... More
Presented by Mr. Sumanta PAL on 10 Feb 2010 at 5:00 PM
Presented by Prof. Norbert HERRMANN on 9 Feb 2010 at 9:00 AM