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Time resolving ionization monitor for microsecond radiation impulses
O A Balk1, E Hochhäuser, K Hahn
1GSF Forschungszentrum für Umwelt und Gesundheit, Neuherberg Institut für Strahlenschutz, Oberschleissheim, Germany.
Physics in Medicine and Biology
|November 14, 1998
Summary
This study details an electronic circuit for fast response ionization chambers. It effectively removes slow ion current interference, allowing accurate representation of ionizing pulse shapes using the fast electron component.
Area of Science:
- Nuclear Instrumentation
- Radiation Detection Physics
Background:
- Ionization chambers detect pulsed radiation, generating signals with fast electron and slow ion components.
- The fast electron component accurately reflects ionizing pulse shape but is often obscured by the slower ion current.
Purpose of the Study:
- To develop and describe an electronic circuit for removing the slow ion current from ionization chamber signals.
- To enable accurate measurement of fast pulsed radiation using the electron current component.
Main Methods:
- An electronic circuit was designed to derive a voltage course matching the ion component's shape.
- This derived voltage course is subtracted from the total chamber signal to isolate the electron component.
- The circuit's function in separating fast electron and slow ion currents is detailed.
Main Results:
- The described electronic circuit successfully isolates the fast electron current component.
- This allows for precise representation of the ionizing pulse shape, free from ion current interference.
Conclusions:
- The developed electronic circuit effectively removes slow ion current artifacts in fast response ionization chambers.
- This technique is crucial for accurate characterization of pulsed radiation events.