FC65-G / FC65-P Ionization Chambers

Farmer-type ionization chambers are used for absolute dosimetry of photon, electron, and proton beams, as well as depth dose and field profile measurements.

The FC65-G chamber is for reference dosimetry and calibrations, while FC65-P is for daily machine checks and routine applications. These chambers work with medical accelerators, X-ray beams (≥70 kV), gamma radiation (¹³⁷Cs, ⁶⁰Co), and proton beams (50–250 MeV). Also, FC65-G is MRI linac compatible.

Monthly QA RT,

Commissioning and Annual QA PT,

Commissioning and Annual QA RT,

Monthly QA PT,

Detectors RT

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Features

Inner dimensions

Sensitive volume (nominal): 0.65 cm³
Total length: 23.0 mm
Total cylinder length: 20.0 mm
Inner diameter of outer electrode: 6.2 mm
Diameter of inner electrode: 1.0 mm
Length of inner electrode: 20.5 mm
Wall thickness of outer electrode: 0.4 mm

Operational characteristics

Polarizing voltage: ±300 V (max. ±500 V)
Recommended pre-irradiation: 5 Gy
Typical sensitivity: 21 nC/Gy
Guard potential: ±300 V (max. ±500 V)
Temperature range: 15 °C to 35 °C
Relative humidity range: 20 % to 80 %

Inner dimensions

Sensitive volume (nominal): 0.65 cm³
Total length: 23.0 mm
Total cylinder length: 20.0 mm
Inner diameter of outer electrode: 6.2 mm
Diameter of inner electrode: 1.0 mm
Length of inner electrode: 20.5 mm
Wall thickness of outer electrode: 0.4 mm

Operational characteristics

Polarizing voltage: ±300 V (max. ±500 V)
Recommended pre-irradiation: 5 Gy
Typical sensitivity: 21 nC/Gy
Guard potential: ±300 V (max. ±500 V)
Temperature range: 15 °C to 35 °C
Relative humidity range: 20 % to 80 %

FC65 Ion Chamber with Chamber Cap

FC65 Ion Chamber with Chamber Cap
FC65 G/P with Chamber Cap in Large Universal Chamber Holder

FC65 G/P with Chamber Cap in Large Universal Chamber Holder
FC65 G/P in Large Universal Chamber Holder

FC65 G/P in Large Universal Chamber Holder