System for monitoring the position intensity uniformity and directivity of a beam of ionizing radiation
US4206355A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 28, 1978 |
| Grant date | Jun 3, 1980 |
| Priority date | — |
| Expiry date | Nov 28, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2237/24578
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A monitoring system transparent to ionizing radiation, designed for measuring the position, intensity, uniformity and directivity of a radiation beam, comprises two or three superimposed ionization chambers respectively provided with respective disk electrodes. One electrode is of smaller area than the other electrode or electrodes, the latter being substantially equal to the cross-sectional area of the radiation beam. Circuits for processing the signals furnished by the different electrodes are associated with comparators and with a safety system which readjusts the beam or deactivates the radiation source in the event that certain "threshold" values are exceeded, indicating a deviation of the beam from a centered position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.