Multianode cylindrical proportional counter for high count rates
US4289967A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 1980 |
| Grant date | Sep 15, 1981 |
| Priority date | — |
| Expiry date | May 23, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J47/062
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cylindrical, multiple-anode proportional counter is provided for counting of low-energy photons (<60 keV) at count rates of greater than 10.sup.5 counts/sec. A gas-filled proportional counter cylinder forming an outer cathode is provided with a central coaxially disposed inner cathode and a plurality of anode wires disposed in a cylindrical array in coaxial alignment with and between the inner and outer cathodes to form a virtual cylindrical anode coaxial with the inner and outer cathodes. The virtual cylindrical anode configuration improves the electron drift velocity by providing a more uniform field strength throughout the counter gas volume, thus decreasing the electron collection time following the detection of an ionizing event. This avoids pulse pile-up and coincidence losses at these high count rates. Conventional RC position encoding detection circuitry may be employed to extract the spatial information from the counter anodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.