During the past decades, Ocean Bottom Seismometers (OBS) have played a key role in permanent seismic activity monitoring at sea as well as allowing a better understating of the earth interior. Data collected by the instrument can provide information on the ocean bottom sub-layers down to a depth of 40 km beneath the ocean floor. The accuracy of the results directly depends on the time drift of ...

The SLD drift chamber requires a ‘slow’ drifting gas and low diffusion to allow wave form digitization. CO2 provides this but requires an admixture of a quencher to provide more gain. _ A test chamber with an 8 sense wire cell, such as will appear in the final chamber, was exposed to an X-ray tube while containing a variety of binary admixtures of COz: 8% isobutane, 8% ethane, and 2% isopropano...

The central drift chamber in the Mark II detector at the SLAC Linear Collider has been instrumented with loo-MHz Flash-ADCs. Pulse digitization provides particle identification through the measurement of average ionization loss in the chamber. We present the results of a study of system performance and outline the systematic corrections that optimize resolution. The data used are from a short t...

The design, construction, and performance characteristics of a high precision gaseous drift chamber made of thin walled proportional tubes are described. The device achieved an average spatial resolution of 45 pm in use for physics analysis with the MAC detector. The B-lifetime result obtained with this chamber is discussed. Invited talk presented at Workshop on Vertex Detectors: State of the A...

This paper is devoted to the method developed in Ref. [1] for 3D reconstruction of the straight tracks in the tracking system consisting of the drift-chamber stereo layers. The method is based on the Hough-transform approach [2] – the discrete case of more general Radon transform [3] – and takes into account both coordinates of the hit wires and drift distances not only for the measurements in ...

The ATLAS Muon Spectrometer is designed to measure the momentum of muons with a resolution of dp/p = 3% and 10 % at beam energies of 100 GeV and 1 TeV respectively. To do this, the spectrometer employs 355,000 Monitored Drift Tubes (MDTs) in 1200 Chambers. Calibration (RT) functions convert drift time measurements into tube-centered impact parameters for track segment reconstruction. RT functio...

IDEA (Innovative Detector for an Electron-positron Accelerator) is a general-purpose detector concept, designed to study electron-positron collisions in wide energy range from very large circular leptonic collider. Its drift chamber provide efficient tracking, high precision momentum measurement and excellent particle identification by exploiting the application of cluster counting technique. T...