Proposal for a New High Precision Particle Detector
THE precision commonly quoted when measuring the position of a charged particle track is ±0.3 mm for wire plane spark chambers1, ±0.4 mm for streamer chambers2 and ±0.7 mm for multiwire proportional chambers3,4. With the onset of the new generation of synchrotrons there is a need for detectors with better resolution. This arises from the fact that the accelerated particles will receive only small deflexions in analysing magnets. This article consists of a proposal for a detector that will provide the necessary increase in resolution.
High Precision Charged Particle Detector using Noble Liquids
WE agree wholeheartedly with P. Rice-Evans1 and the leading article in Nature2 that there is a need for higher resolution particle detectors at the new synchrotrons. Following a suggestion by one of us3, we are working towards the development of a thin multi-conductor chamber filled with a noble liquid. Our initial efforts with liquid argon have been described in several NAL Summer Study reports4 and the successful operation of a liquid xenon proportional counter is the subject of a recent article5.
Momentum measurements of charged particles in a single gap spark chamber placed in a magnetic field
Preliminary measurements of the momenta of charged cosmic particles were made with a large single gap (21 to 50 cm) spark chamber in a magnetic field to determine the accuracy and the particle momentum-track curvature correspondence for such a device. The spark curvature was found to be caused by a true curvature of the particle track in the magnetic field. High accuracy is expected for particles of tens of Bev. (D.C.W.)