Label: Мелодия - С10 07197-8 • Format: Vinyl LP, Compilation, Stereo • Country: USSR • Genre: Classical •
The drift electrode is glued directly to the radiator. The particles pass through the radiator, the generator of the Transition Radiation TR and then enter the conversion and drift region of the readout chamber.
The conversion and drift region is 30 mm deep. The secondary electrons are amplified in the multi-wire proportional counter with a gas gain of around The ratios of charges recorded on adjacent pads for each time sample allow position determination along the track segments in one chamber, called tracklet.
From the inclination of the tracklet one can infer the momentum. The radiator is optimized to provide the best compromise between transition radiation yield, radiation thickness and mechanical stability.
The final radiator consists of polypropylene fibre mats of 3. The foam is reinforced by carbon fibre sheets with a thickness of 0. TRD radiator design. Scanning electron microscope images of the used radiator materials.
The front readout electronics consists of:. At the end of the drift time the Tracklet Processor TP processes the data of all time bins in order to determine potential tracklets. Selected tracklets are shipped to the GTU. Local Tracking Unit Tasks of digital chip on detector:. Event Selection Tasks of physics trigger Снег танцует - Vladimir Viardo* - Играет Владимир Виардо Level Electron Identification Transition Radiation Signature The figure shows the drift time distribution of the average pulse height summed over adjacent pads for pions and electrons.
For electrons there is a significant increase in the average pulse height at later drift times, due to the preferential absorption of the transition radiation near the entrance of the drift chamber.
Going from well isolated tracks data to full multiplicity simulation we observe a deterioration up to Снег танцует - Vladimir Viardo* - Играет Владимир Виардо factor of Pion efficiency as a function of particle momentum.
Pion efficiency as a function of electron efficiency and the total charged particle multiplicity. In the TRD readout chamber the position resolution along the wires is micron for low high multiplicity. This results in the following momentum resolution:. Momentum resolution as a function of Pt for low multiplicity events.
ALICE users. In conjunction with the TPC and the ITS, it provides the necessary electron identification capability to study: Production of light and heavy vector mesons as well as the continuum in the di-electron channel Semi-leptonic decays of hadrons with open charm and open beauty via the single-electron channel using the displaced vertex information provided by the ITS Correlated DD and BB pairs via coincidences of electrons in the central barrel Follow Me Back To Louisville - Don Williams - I Believe In You muons in the forward muon arm Jets with high Et by requiring several high pt tracks in one single TRD module.
From the inclination of the tracklet one can infer the momentum The radiator The radiator is optimized to provide the best compromise between transition radiation yield, radiation thickness and mechanical stability. Electronic Overview The front readout electronics consists of:. Momentum Resolution In the TRD readout chamber the position resolution along the wires is Dia Santo - Jam da Silva - Dia Santo for low high multiplicity.
Wiązanka Przebojów Greckich - Various - Sopot Molo Festiwal 97, El Rocio Que Se Fue - Raya Real - La Primera Vez, Bring On The Nublies - The Stranglers - Apollo Revisited, Y.O.U. (Radio Edit) - Various - Trance Voices V - The Greatest Vocal Trance Anthems, Hell On Earth - Holy Moses - Disorder Of The Order