512 research outputs found
Parallel plate chambers, a fast detector for supercollider experiments
No full textCeramic Parallel Plate Chamber prototypes, for possible use in future supercollider experiments, have been constructed and tested in laboratory. First results on their timing properties are reported. © 1993
Performance of a parallel plate volume cell prototype for a fast iron/gas calorimeter
No full textWe present the first test of the application of the parallel plate chamber principles for the design of a very fast and radiation-hard iron/gas sampling calorimeter, suitable for very forward regions in detectors for LHC, based on the use of thick iron plates as electrodes. We have built a one cell prototype consisting of three parallel thick iron plates (17 mm each). Results on efficiencies and mean collected charge for minimum ionizing particles with different gases are presented
Performance of A Parallel-plate Volume Calorimeter Prototype
No full textAn iron/gas parallel plate volume calorimeter prototype, working in the avalanche mode, has been tested using electrons of 20 to 150 GeV/c momentum with high voltages varying from 5400 to 5600 V (electric fields ranging from 36.0 to 37.3 kV/cm), and a gas mixture of CF4/CO2 (80%/20%). The collected charge has been measured as a function of the high voltage and of the electron energy. The energy resolution has also been measured. Comparisons have been made with Monte Carlo predictions. Agreement between data and simulation allows the calculation of the expected performance of a full size calorimeter
Ceramic PPC technology and performance
No full textMass production technology for PPCs (Parallel Plate Chambers) is described. This technology provides a precise manufacture of chamber components and a high uniformity of chamber properties. Only radiation hard materials were used. Results on the chamber uniformity, the detection efficiency and the timing properties of PPCs are presented. © 1994
Radiation hardness test of ceramic parallel-plate chambers with gammas up to 1 Grad
No full textResults on the radiation resistance test of ceramic parallel-plate chambers after nearly 1 Grad gamma irradiation are presented
First results from pion beam test of an iron/gas calorimeter based on ceramic parallel plate chambers
No full textA prototype module of an iron/gas calorimeter based on parallel plate chambers, has been tested using high energy electrons and pions, at two high voltages, using CF4/CO2 (80/20) at atmospheric pressure, The collected charge and energy resolution have been measured as a function of the beam energy for both electrons and pions and compared with Monte Carlo predictions
Performance of an iron/gas sampling calorimeter based on ceramic parallel-plate chambers
No full textA prototype module of an iron-gas sampling calorimeter based on parallel-plate chambers, full-size depth has been tested using high-energy muons, electrons and pions. The module was equipped with more than 1000 active cells read out individually. Experimental measurements at the test beam and their comparison with Monte-Carlo simulations are presented, Expected performance for a calorimeter suitable for low-angle regions in LHC experiments are derived
Measurement of the spark probability in single gap parallel plate chambers
No full textWe present results on the measurements of the spark probability with CO2 and CF4/CO2 (80/20) mixture, at atmospheric pressure, using 1.5 mm gas gap parallel plate chambers, working at a gas gain ranging from 4.5 x 10(2) to 3.3 x 10(4)
MEASUREMENT OF THE PRODUCTION OF HIGH-MASS GAMMA-GAMMA, PI-0-PI-0, AND GAMMA-PI-0 PAIRS IN PI-P, PI+P, AND PP COLLISIONS AT 300 GEV/C
No full textMEASUREMENT OF DIRECT PHOTON PRODUCTION AT LARGE TRANSVERSE-MOMENTUM IN PI-P, PI+P, AND PP COLLISIONS AT 300-GEV/C
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