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 • Hemispherical geometry for easy placement and alignment
• High impedance for minimum drift
• High output - 32nC/Gy typical
• Excellent output uniformity vs. gantry angle
• Outstanding stability - <0.1%/kGy at 6MV photon beam
• Available in various water equivalences for photons and electrons
• Vinyl-sheathed cable eliminates kinking
The EquiDose™ II diode detectors are a new generation of solid state detectors exhibiting superior characteristics. Radiation damage is extremely low, with detectors typically retaining better than 94% of their original response after 15,000 exposures of 2Gy (3kGy). Axial directional response variation is typically less than 1%, ±90° from perpendicular. A low temperature coefficient minimizes sensitivity variation due to patient heat transfer during treatment.
Each photon EquiDose™ II detector responds most effectively over one of three energy ranges. When used within its stated energy range, a calibrated detector will register a dose approximately equal to that expected at dmax. They operate in shorted junction mode and require no bias voltage.
Specifications
Detector type: n type diode
Detector size: 0.8 x 0.8 mm2
Effective Detection Thickness: 50µm
Active Volume: 0.136mm3
Nominal Output: 32 nC/Gy
Input Impedance: >200MW at 10V @ 24°C
Temp. Coefficient: <0.5% / °C
Linearity: Within 0.2%, 50 to 500 rads
Output Stability: 2% loss of sensitivity at 1kGy(10MeV electron beam), 0.1 % loss of sensitivity at 1kGy (6MV photon beam)
Directional Dependence: optimized for each model
Construction: Hemispherical with 12.7 mm flat bottom
Cable: 2m low-noise coax, 2.5mm thick
Connector: BNC (Lemo optional)
Note: Older Models Lemo-M, Lemo Adapter Recommended
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