منابع مشابه
EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH CERN–EP/99–99 15 July 1999 RESOLUTION LIMITS OF DRIFT TUBES
Measurements of the drift-tube response to charged particle tracks are compared with a complete simulation. The measured resolution of typically 80μm agrees well with the simulation and allows the individual factors limiting the resolution such as diffusion, charge deposit fluctuations, gas gain fluctuations and signal processing to be studied. The results with respect to the dependence of the ...
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Modern detectors such as ATLAS use pressurized drift tubes to minimize diffusion and achieve high coordinate accuracy. However, the coordinate accuracy depends on the exact knowledge of converting measured times into coordinates. Linear spacetime relationships are best for reconstruction, but difficult to achieve in the E ∝ 1 r field. Previous mixtures, which contained methane or other organic ...
متن کاملTests of Thin-wall Drift Tubes Developed for Panda Trackers
The PANDA experiment will be carried out at the international FAIR facility in the GSI laboratory (Darmstadt, Germany). According to the Technical Design Report, the Forward Tracker (six stations FT1– FT6) [1] and the Central Straw Tube Tracker (STT) [2] will be composed from thin-wall drift tubes (called straw-tubes below) in large quantities, 13500 and 4600 tubes, respectively. The straw-tube...
متن کاملDrift-diffusion Limits of Kinetic Models for Chemotaxis: a Generalization
We study a kinetic model for chemotaxis introduced by Othmer, Dunbar, and Alt [22], which was motivated by earlier results of Alt, presented in [1], [2]. In two papers by Chalub, Markowich, Perthame and Schmeiser, it was rigorously shown that, in three dimensions, this kinetic model leads to the classical KellerSegel model as its drift-diffusion limit when the equation of the chemo-attractant i...
متن کاملLimits on the Accuracy of Drift Chambers and Calibration Beams
years from now. The understanding of intrinsic limits on the spatial accuracy of drift chambers, and the development of new methods for calibrating them, are therefore still relevant. The present talk attempts to review the state of the art. In order to see what are the main questions to be asked, I have summarized in Table 1 the main characteristics of the drift-chamber detectors proposed for ...
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ژورنال
عنوان ژورنال: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
سال: 2000
ISSN: 0168-9002
DOI: 10.1016/s0168-9002(99)01014-1