Multiwire proportional chamber development. Final report, 1 November 1970- -31 December 1972
The development of large area multiwire proportional chambers, to be used as high resolution spatial detectors in cosmic ray experiments is described. A readout system was developed which uses a directly coupled, lumped element delay-line whose characteristics are independent of the MWPC design. A complete analysis of the delay-line and the readout electronic system shows that a spatial resolution of about 0.1 mm can be reached with the MWPC operating in the strictly proportional region. This was confirmed by measurements with a small MWPC and / sup 55/Fe x-rays. A simplified analysis was carried out to estimate the theoretical limit of spatial resolution due to delta-rays, spread of the discharge along the anode wire, and inclined trajectories. To calculate the gas gain of MWPC' s of different geometrical configurations a method was developed which is based on the knowledge of the first Townsend coefficient of the chamber gas. (auth)
- Research Organization:
- TRW Systems Group, Redondo Beach, Calif. (USA)
- DOE Contract Number:
- NAS9-11315
- NSA Number:
- NSA-29-005234
- OSTI ID:
- 4388032
- Report Number(s):
- N-73-22210; NASA-CR-128899
- Resource Relation:
- Other Information: Orig. Receipt Date: 30-JUN-74
- Country of Publication:
- United States
- Language:
- English
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