Spherical GEMs for parallax-free detectors (2009)
Pinto, Serge Duarte, Alfonsi, Matteo, Brock, Ian, Croci, Gabriele, David, Eric, De Oliveira, Rui, ...
We developed a method to make GEM foils with a spherical geometry. Tests of this procedure and with the resulting spherical \textsc{gem}s are presented. Together with a spherical drift electrode, a...
Progress on large area GEMs (2009)
Pinto, Serge Duarte, Villa, Marco, Alfonsi, Matteo, Brock, Ian, Croci, Gabriele, David, Eric, ...
In 2008, a triple GEM detector prototype with an area of ~2000 cm2 has been constructed, based on foils of 66*66 cm. GEMs of such dimensions had not been made before, and innovations to the existing...
Pinto, Serge Duarte, Villa, Marco, Alfonsi, Matteo, Brock, Ian, Croci, Gabriele, David, Eric, ...
We developed a method to make GEM foils with a spherical geometry. Tests of this procedure and with the resulting spherical GEMs are presented. Together with a spherical drift electrode, a spherical...
Study of relevant parameters of GEM-based detectors (2008)
Croci, Gabriele, Ropelewski, Leszek, Sauli, Fabio, Ragazzi, S
The Gas Electron Multiplier consist of a thin Kapton insulating (50 $\mu$m) foil copper-clad on both sides and perforated by a high density, regular matrix of holes (around 100 per square...
The COMPASS Experiment at CERN (2007)
Abbon, P, Albrecht, E, Alexakhin, V Yu, Alexandrov, Yu, Alexeev, G D, Alekseev, M G, ...
The COMPASS experiment makes use of the CERN SPS high-intensitymuon and hadron beams for the investigation of the nucleon spin structure and the spectroscopy of hadrons. One or more outgoing...
A triple-GEM telescope for the TOTEM experiment (2006)
Lami, S, Latino, G, Oliveri, E, Ropelewski, Leszek, Turini, N
The TOTEM experiment at LHC has chosen the triple Gas Electron Multiplier (GEM) technology for its T2 telescope which will provide charged track reconstruction in the rapidity range 5.3
Ion feedback suppression in Time Projection Chambers (2006)
Sauli, Fabio, Everaerts, P, Ropelewski, Leszek
A controlled-voltage Gas Electron Multiplier (GEM) can be used to block the re-injection of positive ions in large volume Time Projection Chambers. With proper choice of geometry, gas filling and...
Ion feedback suppression in Time Projection Chambers (2006)
Sauli, Fabio, Ropelewski, Leszek, Everaerts, P
A controlled-voltage Gas Electron Multiplier (GEM) can be used to block the re-injection of positive ions in large volume Time Projection Chambers. With proper choice of geometry, gas filling and...
Light multi-GEM detector for high-resolution tracking systems (2005)
Bondar, A, Buzulutskov, A F, Oliveira, R, Ropelewski, Leszek, Sauli, Fabio, Shekhtman, L I
Controlled etching of copper electrodes in Gas Electron Multiplier foils allows a reduction of the material budget by more than a factor of two for a triple-GEM detector. Detectors making use of...
Particle detectors: principles and techniques (2004)
Joram, Christian, Ropelewski, Leszek, Moll, Michael, D'Ambrosio, Carmelo, Gys, Thierry, Mornacchi, Giuseppe
GEM-based photon detector for rich applications (2004)
Meinschad, T, Ropelewski, Leszek, Sauli, Fabio
We describe the performance of a photon detector based on the Gas Electron Multiplier (GEM). With a CsI photocathode deposited on the first GEM in a cascade, the device permits to efficiently detect...
GEM-based photon detector for rich applications (2004)
Meinschad, T, Ropelewski, Leszek, Sauli, Fabio
We describe the performance of a photon detector based on the Gas Electron Multiplier (GEM). With a CsI photocathode deposited on the first GEM in a cascade, the device permits to efficiently detect...
Construction, test and commissioning of the triple-GEM tracking detector for COMPASS (2002)
Altunbas, M C, Capéans-Garrido, M, Dehmelt, K, Ehlers, J, Konorov, I, Gandi, A, ...
The Small Area Tracking system of the COMPASS experiment at CERN includes a set of 20 large area, fast position-sensitive Gas Electron Multiplier (GEM) detectors, designed to reliably operate in the...
Triple GEM tracking detectors for COMPASS (2002)
Ketzer, B, Altunbas, M C, Dehmelt, K, Ehlers, J, Friedrich, J M, Grube, B, ...
The small area tracker of COMPASS, a high-luminosity fixed target experiment at CERN's SPS, includes a set of 20 large-size ($31\times 31\,\cm^2$) Gas Electron Multiplier (GEM) detectors. Based on...
Aging measurements with the gas electron multiplier (GEM) (2001)
Altunbas, M C, Dehmelt, K, Kappler, S, Ketzer, B, Ropelewski, Leszek, Sauli, Fabio, ...
Continuing previous aging measurements with detectors based on the Gas Electron Multiplier (GEM), a $31\times 31$cm$^2$ triple-GEM detector, as used in the small area tracking of the COMPASS...
Discharge studies and prevention in the gas electron multiplier (GEM) (2001)
Bachmann, S, Bressan, A, Capéans-Garrido, M, Deutel, M, Kappler, S, Ketzer, B, ...
The gas electron multiplier (GEM) used as single proportional counter or in a cascade of two or more elements, permits to attain high gains and to perform detection and localization of ionizing...
Development and applications of the Gas Electron Multiplier (2000)
Bachmann, S, Bressan, A, Kappler, S, Ketzer, B, Deutel, M, Ropelewski, Leszek, ...
The Gas Electron Multiplier (GEM) has been recently developed to cope with the severe requirements of high luminosity particle physics experimentation. With excellent position accuracy and very high...
Performance of GEM detectors in high intensity particle beams (2000)
Bachmann, S, Bressan, A, Ketzer, B, Deutel, M, Ropelewski, Leszek, Sauli, Fabio, ...
We describe extensive tests of Double GEM and Triple GEM detectors, including full size prototypes for the COMPASS experiment, exposed to high intensity muon, proton and pion beams at the...
Optimisation of the Gas Electron Multiplier for high rate application (2000)
Bachmann, S, Bressan, A, Ketzer, B, Deutel, M, Ropelewski, Leszek, Sauli, Fabio, ...
The construction and performance of large size GEM~detectors for the COMPASS~experiment is described. Based on the experience gained during the operation of these detectors in high rate muon, proton,...
Optimization of operation and test of large size GEM detectors (1999)
Bachmann, S, Bressan, A, Placci, Alfredo, Ropelewski, Leszek, Sauli, Fabio
We describe basic development work aimed at the realization of large (~1000 cm2 active) detectors for the COMPASS experiment, based on the gas electron multiplier technology. Essentially a high-rate...
Adams, D, Adeva, B, Akdogan, T, Arik, E, Arvidson, A, Badelek, B, ...
A muon beam polarimeter was built for the SMC experiment at the CERN SPS, for beam energies of 100 and 190~GeV. The beam polarisation is determined from the asymmetry in the elastic scattering off...
Charge amplification and transfer processes in the gas electron multiplier (1999)
Bachmann, S, Bressan, A, Ropelewski, Leszek, Sauli, Fabio, Sharma, A, Mörmann, D
We report the results of systematic investigations on the operating properties of detectors based on the gas electron multiplier (GEM). The dependence of gain and charge collection efficiency on the...
Charge amplification and transfer processes in the gas electron multiplier (1999)
Bachmann, S, Bressan, A, Ropelewski, Leszek, Sauli, Fabio, Sharma, A, Mörmann, D
We report the results of systematic investigations on the operating properties of detectors based on the gas electron multiplier (GEM). The dependence of gain and charge collection efficiency on the...
Beam tests of the gas electron multiplier (1998)
Bressan, A, Labbé, J C, Pagano, P, Ropelewski, Leszek, Sauli, Fabio
We describe the results of systematic measurements, carried out with single and double GEM detectors with printed circuit read-out and having an active area 10x10 cm , both in the laboratory and in a...
Two-dimensional readout of GEM detectors (1998)
Bressan, A, De Oliveira, R, Gandi, A, Labbé, J C, Ropelewski, Leszek, Sauli, Fabio, ...
The recently introduced Gas Electron Multiplier (GEM) permits the amplification of electrons released by ionizing radiation in a gas by factors approaching ten thousand, larger gains can be obtained...
High rate behavior and discharge limits in micro-pattern detectors (1998)
Bressan, A, Hoch, M, Pagano, P, Ropelewski, Leszek, Sauli, Fabio, Biagi, S F, ...
We present and discuss a set of systematic measurements, carried out with gaseous proportional micro-pattern detectors, in order to assess their maximum gain when irradiated with high-rate soft...
Adeva, B, Akdogan, T, Arik, E, Arvidson, A, Badelek, B, Bardin, G, ...
We present the final results of the spin asymmetries $A_1$ and the spin structure functions $g_1$ of the proton and the deuteron in the kinematic range $0.0008
Further developments of the gas electron multiplier (GEM) (1998)
Benlloch, J M, Bressan, A, Capéans-Garrido, M, Gruwé, M, Hoch, M, Labbé, J C, ...
We describe the development and operation of the Gas Electron Multiplier, a thin insulating foil metal-clad on both sides and perforated by a regular pattern of small holes. The mesh can be...
Development of the gas electron multiplier (GEM) (1998)
Benlloch, J M, Bressan, A, Büttner, C, Capéans-Garrido, M, Gruwé, M, Hoch, M, ...
We describe recent developments of the Gas Electron Multiplier (GEM), a thin composite mesh acting as proportional avalanche amplifier in gas counters. In beam tests we have verified the excellent...
Barr, A J, Bachmann, S, Boimska, B, Bouclier, Roger, Braem, André, Camps, C, ...
We describe the construction, test and installation procedures, and the experience gained with the operation of a small but complete system of high rate Micro-Strip Gas Chambers, made on thin...
Progress with the gas electron multiplier (1997)
Büttner, C, Capéans-Garrido, M, Dominik, Wojciech, Hoch, M, Labbé, J C, Manzin, G, ...
The Gas Electron Multiplier (GEM) amplifies electrons released in a gas and transfers them to a second element of detection, multi-wire or micro-strip chamber. We describe recent developments...
Progress with diamond over-coated microstrip gas chambers (1997)
Boimska, B, Bouclier, Roger, Capéans-Garrido, M, Dominik, Wojciech, Million, Gilbert, Ropelewski, Leszek, ...
We describe recent observations and measurements with Micro-Strip Gas Chambers coated, after manufacturing, with a thin diamond-like layer in order to increase their rate capability. Compared to the...
Boimska, B, Bouclier, Roger, Dominik, Wojciech, Hoch, M, Million, Gilbert, Ropelewski, Leszek, ...
We describe recent observations and measurements realized with micro-strip gas chambers (MSGCs) manufactured on boro-silicate glass coated with a thin layer of diamond-like carbon (DLC) having a...
The virtual cathode chamber (1997)
Capéans-Garrido, M, Dominik, Wojciech, Hoch, M, Ropelewski, Leszek, Sauli, Fabio, Shekhtman, L I, ...
We describe the operating principle and the first experimental results obtained with gas micro-strip detectors realized with anodes only on the active side, the multiplying field being provided from...
New observations with the gas electron multiplier (GEM) (1997)
Bouclier, Roger, Dominik, Wojciech, Hoch, M, Labbé, J C, Million, Gilbert, Ropelewski, Leszek, ...
We describe recent measurements realized with the Gas Electron Multiplier (GEM) mesh added as pre-amplification element to a multiwire and a micro-strip chamber. Large, stable combined gains are...
"Diamond" over-coated Microstrip Gas Chambers for high rate operation (1997)
Barr, A J, Boimska, B, Bouclier, Roger, Capéans-Garrido, M, Dominik, Wojciech, Hoch, M, ...
We describe the recent developments on the diamond-like carbon (DLC) over-coated Microstrip Gas Chambers made on drawn glass substrates. MSGC surface coating with thin DLC layer of stable and...
Operation of high rate microstrip gas chambers (1997)
Barr, A J, Boimska, B, Bouclier, Roger, Capéans-Garrido, M, Dominik, Wojciech, Manzin, G, ...
We describe recent measurements carried out in well controlled and reproducible conditions to help understanding the factors affecting the short and long term behaviour of Microstrip Gas Chambers....
Study of ageing and gain limits of microstrip gas chambers at high rates (1997)
Boimska, B, Bouclier, Roger, Capéans-Garrido, M, Claes, S, Dominik, Wojciech, Hoch, M, ...
The CMS experiment comprises MSGCs as one of the key detection elements for high luminosity tracking at LHC. In addition to the high dose rate of 10 mC/year per cm of strip, these detectors have to...
The gas electron multiplier (GEM) (1996)
Bouclier, Roger, Capéans-Garrido, M, Dominik, Wojciech, Hoch, M, Labbé, J C, Million, Gilbert, ...
We describe operating priciples and results obtained with a new detector component: the Gas Electrons Multiplier (GEM). Consisting of a thin composite sheet with two metal layers separated by a thin...
Ageing of microstrip gas chambers: problems and solutions (1996)
Bouclier, Roger, Capéans-Garrido, M, Garabatos, C, Manzin, G, Million, Gilbert, Ropelewski, Leszek, ...
The experimental set-up and the procedures used for studying the long-term behaviour of micro-strip gas chambers under sustained irradiation are described in detail. The most significant measurements...
High rate operation of micro-strip gas chambers (1996)
Bouclier, Roger, Capéans-Garrido, M, Hoch, M, Million, Gilbert, Ropelewski, Leszek, Sauli, Fabio, ...
Measurement of the proton and the deuteron structure functions, F$_{2}^{p}$ and F$_{2}^{d}$ (1995)
Arneodo, M, Arvidson, A, Badelek, B, Ballintijn, M K, Baum, G, Beaufays, J, ...
Large enhancement of deuteron polarization with frequency modulated microwaves (1995)
Adeva, B, Ahmad, E, Arik, S, Arvidson, A, Badelek, B, Ballintijn, M K, ...
We report a large enhancement of 1.7 in deuteron polarization up to values of 0.6 due to frequency modulation of the polarizing microwaves in a two liters polarized target using the method of dynamic...
High rate operation of micro-strip gas chambers on diamond-coated glass (1995)
Bouclier, Roger, Capéans-Garrido, M, Million, Gilbert, Ropelewski, Leszek, Sauli, Fabio, Temmel, T, ...
Very high rate operation of microstrip gas chambers can be achieved using slightly conducting substrates. We describe preliminary measurements realized with detectors manufactured on boro-silicate...
Optimization of design and beam test of microstrip gas chambers (1995)
Bouclier, Roger, Capéans-Garrido, M, Evans, J, Garabatos, C, Manzin, G, Million, Gilbert, ...
We describe recent experimental and theoretical work aimed at optimizing the geometry and the operation of micro-strip gas chambers in order to improve their performance and reliability. With the...
Enhancement of nuclear polarization with frequency modulated microwaves (1995)
Adeva, B, Arik, E, Ahmad, S, Arvidson, A, Badelek, B, Ballintijn, M K, ...
The structure function ratios F$_{2}^{Li}$/F$_{2}^{D}$ and F$_{2}^{C}$/F$_{2}^{D}$ at small x (1995)
Arneodo, M, Arvidson, A, Badelek, B, Ballintijn, M K, Baum, G, Beaufays, J, ...
We present the structure function ratios F2(Li)/F2(D) and F2(C)/F2(D) measured in deep inelastic muon-nucleus scattering at a nominal incident muon energy of 200 GeV. The kinematic range 0.0001 < x <...
On some factors affecting discharge conditions in micro-strip gas chambers (1995)
Bouclier, Roger, Capéans-Garrido, M, Garabatos, C, Manzin, G, Million, Gilbert, Ropelewski, Leszek, ...
Development of micro-strip gas chambers for high rate operation (1995)
Bouclier, Roger, Capéans-Garrido, M, Garabatos, C, Manzin, G, Million, Gilbert, Ropelewski, Leszek, ...
A high-rate, high-resolution asymmetric wire chamber with microstrip readout (1995)
Charpak, Georges, Crotty, Ian, Giomataris, Ioanis, Ropelewski, Leszek, Williams, M C S
Exclusive $\varrho^{0}$ and $\phi$ muoproduction at large Q$^{2}$ (1994)
Arneodo, M, Arvidson, A, Badelek, B, Ballintijn, M K, Baum, G, Beaufays, J, ...
Measurement of the deuteron polarization in a large target (1994)
Adeva, B, Ahmad, S, Arvidson, A, Badelek, B, Ballintijn, M K, Bardin, G, ...
A re-evaluation of the Gottfried sum (1994)
Arneodo, M, Arvidson, A, Badelek, B, Ballintijn, M K, Baum, G, Beaufays, J, ...
Measurement of the polarisation of a high-energy muon beam (1993)
Adeva, B, Ahmad, S, Arvidson, A, Badelek, B, Ballintijn, M K, Bardin, G, ...
Combined analysis of world data on nucleon spin structure functions (1993)
Adeva, B, Ahmad, S, Arvidson, A, Badelek, B, Ballintijn, M K, Bardin, G, ...
A re-evaluation of F$_{2}^{n}$/F$_{2}^{p}$ and F$_{2}^{p}$-F$_{2}^{n}$ (1993)
Arneodo, M, Arvidson, A, Badelek, B, Ballintijn, M K, Baum, G, Beaufays, J, ...
Quark and gluon distributions and $\alpha_{s}$ from nucleon structure functions at low $x$ (1993)
Arneodo, M, Arvidson, A, Badelek, B, Ballintijn, M K, Baum, G, Beaufays, J, ...
Measurement of hadron shower punchthrough in iron (1993)
Aalste, M, Andlinger, M, Bacci, Cesare, Bencze, G L, Bergman, R, Bettini, A, ...
Measurement of the spin-dependent structure function g$_{1}$(x) of the deuteron (1993)
Adeva, B, Ahmad, S, Arvidson, A, Badelek, B, Ballintijn, M K, Bardin, G, ...
Performance of gas microstrip chambers on glass substrates with electronic conductivity (1993)
Bouclier, Roger, Million, Gilbert, Ropelewski, Leszek, Sauli, Fabio, Pestov, Yu N, Shekhtman, L I
A measurement of the ratio of the nucleon structure function in copper and deuterium (1992)
Ashman, John Gavin, Badelek, B, Baum, G, Beaufays, J, Bee, C P, Benchouk, C, ...
Measurements of R$^{d}$ - R$^{p}$ and R$^{Ca}$ - R$^{C}$ in deep inelastic muon scattering (1992)
Amaudruz, P A, Arneodo, M, Arvidson, A, Badelek, B, Baum, G, Beaufays, J, ...
Proton and deuteron F$_{2}$ structure functions in deep inelastic muon scattering (1992)
Amaudruz, P A, Arneodo, M, Arvidson, A, Badelek, B, Baum, G, Beaufays, J, ...
Muoproduction of J/$\psi$ and the gluon distribution of the nucleon (1992)
Ashman, John Gavin, Badelek, B, Baum, G, Beaufays, J, Bee, C P, Benchouk, C, ...
High flux operation of microstrip gas chambers on glass and plastic supports (1992)
Bouclier, Roger, Florent, J J, Gaudaen, J, Million, Gilbert, Pasta, A, Ropelewski, Leszek, ...
Transverse momentum distributions for exclusive $\varrho^{0}$ muoproduction (1992)
Amaudruz, P A, Arneodo, M, Arvidson, A, Badelek, B, Baum, G, Beaufays, J, ...
Microstrip gas chambers on thin plastic supports (1992)
Bouclier, Roger, Florent, J J, Gaudaen, J, Million, Gilbert, Ropelewski, Leszek, Sauli, Fabio
The ratio F$^{n}_{2}$/F$^{p}_{2}$ in deep inelastic muon scattering (1991)
Amaudruz, P A, Arneodo, M, Arvidson, A, Badelek, B, Baum, G, Beaufays, J, ...
Precision measurement of structure function ratios for $^{6}$Li, $^{12}$C and $^{40}$Ca (1991)
Amaudruz, P A, Arneodo, M, Arvidson, A, Badelek, B, Baum, G, Beaufays, J, ...
Comparison of forward hadrons produced in muon interactions on nuclear targets and deuterium (1991)
Ashman, John Gavin, Badelek, B, Baum, G, Beaufays, J, Bee, C P, Benchouk, C, ...
The Gottfried sum from the ratio F$^{n}_{2}$/F$^{p}_{2}$ (1991)
Amaudruz, P A, Arneodo, M, Arvidson, A, Badelek, B, Baum, G, Beaufays, J, ...
Measurement of the neutron and the proton F$_{2}$ structure function ratio (1990)
Allasia, D, Amaudruz, P A, Arneodo, M, Arvidson, A, Badelek, B, Baum, G, ...
A modular multidrift vertex detector (1990)
Bouclier, Roger, Charpak, Georges, Ropelewski, Leszek, Santiard, Jean-Claude, Solomey, Nickolas, Sauli, Fabio
Exclusive rho0 and phi production in deep inelastic muon scattering (1990)
Ashman, John Gavin, Badelek, B, Baum, G, Beaufays, J, Bee, C P, Benchouk, C, ...