Position-Sensitive Gas Proportional Chambers

Investigation of Chevron Cathode Pads for Position Encoding in Very High Rate, Gas Proportional Chambers*

New techniques for position encoding in very high rate particle and photon detectors will be required in experiments planned for future particle accelerators such as the Superconducting Super Collider and new, high intensity, synchrotron sources. We are carrying out a detailed theoretical and experimental study of a position interpolation technique in which a row of chevron shaped cathode pads ...

Drift and Proportional Tracking Chambers

Multiwire proportional chambers in the HERMESexperimentA

The multiwire proportional chambers of the HERMES spectrometer are described. The chambers are located in the spectrometer magnet gap which imposed strong constraints on their design. Non-ammable gas mixture of Ar(65%), CO 2 (30%) and CF 4 (5%) is successfully used with an eeciency plateau 500V wide. The readout is performed by means of the recently developed LeCroy PCOS4 acquisition system upg...

Mobilities of positive ions in some gas mixtures used in proportional and drift chambers

2014 We have measured the mobility of positive ions in several gas mixtures frequently used in proportional and drift chambers, namely Ar-(OCH3)2CH2, Ar-(OCH3)2CH2-IsoC4H10, Ar-CH4, and Ar-CO2. In all gas mixtures considered, Blanc’s law of positive ion mobility has been verified, except for a very small methylal concentration in argon-isobutane-methylal. The law permits the calculation of ion ...

Interlaboratory Development of an Integrated Circuit for Multiwire Proportional Chambers