Apparatus for measuring the peak voltage applied to a radiation source
This patent describes apparatus for measuring the peak voltage applied to an X-ray radiation source operating at an unknown input voltage . It comprises a set of radiation absorbing filters, the set including a first filter which includes at least a first chemical element that exhibits a known {Kappa}-absorption edge and a second filter which includes at least a second chemical element; the elements being chosen so that the filters exhibit essentially the same radiation absorption characteristics for photon energies below the known {Kappa}-absorption edge of the first element, but substantially different characteristics above the known {Kappa}-absorption edge; the filters adapted to be positioned so that the first and second filters are irradiated by the radiation source with the radiation impinging upon a surface of each filter and partially absorbed thereby as it passes therethrough so as to exit therefrom as attenuated radiation; and, detector means positioned for receiving the attenuated radiation passed by the first and second filters and providing an output indication when the radiation passed by the filters is differently attenuated representative that the input voltage has exceeded the known {Kappa}-absorption edge of the first element. Thereby providing an indication of the magnitude of the input voltage.
- Assignee:
- Keithley Instruments Inc., Solon, OH
- Patent Number(s):
- US 4843619
- Application Number:
- PPN: US 7185138A
- OSTI ID:
- 5415565
- Country of Publication:
- United States
- Language:
- English
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