117610358
Upgrading of the LEAR stochastic cooling systems
117122168
Momentum stochastic cooling with digital notches
40897280
Operational aspects of electron cooling at the low energy antiproton ring (LEAR)
The major modifications made to the LEAR (Low Energy Antiproton Ring) electron cooler for its reliable and effective use in everyday operations are described. The transverse feedback system used to counteract the coherent instabilities observed with the dense beams obtained with electron cooling is also discussed. Experience gained while using the cooler in a semi-operational manner has made it possible to redesign the critical components. Supplemented by the active feedback system, electron cooling can now be used consistently between decelerating ramps to obtain beams of ultralow momenta with an appreciable gain in duty cycle and beam quality as compared to previous modes of operation.<<ETX>>
117135709
Status and future possibilities of the stochastic cooling system for LEAR
18164993
Performance update of LEAR
91685081
Etude de l'interaction $\Xi^{-}N$ a haute energie et du rapport d'embranchement $\Gamma(\Xi^{-} \to \eta\pi^{-})/\Gamma(\Xi^{-} \to \Lambda \pi^{-})$
120136534
A multi-hit ADC and TDC for the charged particle trigger of the L3 experiment☆
Abstract A Fastbus ADC and TDC module has been developed for the trigger of the L3 experiment. It provides fast and precise integration of successive pairs of charges derived from the charge division wires of the central tracking chamber, as well as a measurement of their drift times. The minimum separation time between digitizations is 170 ns. The charges are measured with a precision of 1 pC up to charges of 600 pC. The drift times are measured in 50 ns time bins. A system including 60 modules provides data allowing the reconstruction of charged particle tracks in three dimensions. This information is used in background rejection algorithms of the second and third level triggers.
121341698
Right-left ambiguity resolution in a time expansion chamber
Abstract In a Time Expansion Chamber two high resolution drift volumes on both sides of a small detection gap are separated from the gap by a fine grid wire plane. The charge asymmetry induced on the grid wires in the vicinity of an anode is used to resolve the right-left ambiguity. It is the only method which is fast enough for a first level trigger and which does not deteriorate the necessary field homogeneity.
116037670
Results from the L3 experiment
This talk is intended for non-specialists of high energy physics, curious of the results obtained by the L3 experiment in its first year of running at the CERN Large Electron-Positron collider
122512936
The endcap shower counters for the MARK III detector
Abstract We describe below the design, construction and performance of the end cap shower counters of the MARK III detector. These counters, made up of layers of aluminum proportional tubes sandwiched between lead sheets, achieve a position resolution for electrons or photons of about 7 mm × 9 mm using charge division for the position measurement along the wire direction. The energy resolution for fully contained electron and photon showers is σ E E = 17% √E . The counters are segmented into twelve individual readouts in depth, allowing the very good pattern recognition needed for the separation of nearby showers. The total depth of the counter, twelve radiation lengths, is adequate for the SPEAR energy range. Good photon detection efficiency extends to energies below 100 MeV.