18504
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BrandPHILIPS
ClassRadiation Counter Tube
Construction
Primary TypeSelf-quenching Geiger-Müller tube
EnvelopeMetal with mica window
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage425 V
Audio Performance
Key Features
- Self quenching
- Mica window
- Halogen quenching agent
- Detects Alpha, Beta, Gamma, and Neutron radiation
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Geiger-Müller Counting | 300V | - | - | - | - |
Application Notes
For measuring thermal neutrons, the tube should be wrapped in cadmium foil (~0.5 mm thickness). Keep dry and clean to prevent leakage currents. Mounting requires low-capacity connections.
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