Induced effects in ionization chamber cables by photon and electron irradiation

Area of Science:

• Medical Physics
• Radiation Detection and Measurement

Background:

• Ionization chambers are crucial for radiation dosimetry.
• Cables and connectors can be susceptible to radiation-induced effects, impacting measurement accuracy.
• Understanding these effects is vital for reliable radiation monitoring.

Purpose of the Study:

• To investigate the impact of photon and electron irradiation on ionization chamber cables and connectors.
• To quantify the radiation-induced leakage current and its influence on chamber response.
• To develop correction factors for irradiation effects.

Main Methods:

• Experimental investigation under varied conditions.
• Measurement of ionization chamber response using a 90Sr standard check source.
• Measurement of radiation-induced leakage current.

Main Results:

• Photon and electron irradiation alter the performance of cables and connectors.
• Radiation-induced leakage currents were observed and measured.
• Correction factors were successfully derived, dependent on radiation energy, cable length, and absorbed dose.

Conclusions:

• Irradiation effects on ionization chamber accessories are significant and quantifiable.
• The derived correction factors enable compensation for these effects.
• Accurate radiation measurements can be maintained by applying these correction factors.