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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. 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
Sensitivity: 32 nC/Gy
Input Impedance: >200MW @ 24°C, 10MV reverse bias
Temp. Coefficient: 0.5% / °C
Output Stability: 2% loss of sensitivity with10MeV electron beam,
0.1% loss of sensitivity at 1000G, 6MV photon beam
Construction: Hemispherical with 12.7 mm flat bottom
Cable: 2m low-noise coax, 2.5mm thick with Tygon® Sheath
Connector: BNC-M (Lemo optional)
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