High-accuracy, two-dimensional read-out in multiwire proportional 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...

Interlaboratory Development of an Integrated Circuit for Multiwire Proportional Chambers

A Vertex Trigger based on Cylindrical Multiwire Proportional Chambers

This article describes the technical implementation and the performance of the zvertex trigger (CIP2k), which is part of the H1-experiment at HERA. The HERA storage ring and collider was designed to investigate electron (and positron) proton scattering at a center-of-mass energy of 320 GeV. To improve the sensitivity for detecting non-standard model physics and other high momentum transfer phen...

Adaptable Geometry , Low Mass Hodoscopes Us 1 Ng Cathode Read - out Proportional Chambers

The use of cathode read-out proportional chambers as large area, low mass hodoscopes has been investigated. Measurements of time resolution, space resolution, cathode multiplicity, and chamber capacitance effects are presented here. Comments about future applications are included. (Submitted to Nucl. Instr . and Methods. ) *Work supported by the U. S. Energy Research and Development Administrat...

Computation of Electrostatic and Gravitational Sag in MultiWire Chambers

A numerical method of determining the wire sag in a multiwire proportional chamber used in RICH [1] by solving the second order differential equation which governs the wire stability has been presented. The three point Finite Difference Method (FDM) has generated a tridiagonal matrix equation relating the deflection of wire segments to the force acting on it. The precise estimates of electrosta...