18509

Miniature self-quenching Philips Geiger-Müller counter for gamma and high-energy beta radiation. Its compact cathode and low background suit small radiation-monitoring and counting instruments.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: -

Description

Miniature self-quenching Geiger-Müller counter for gamma and high-energy beta radiation. The supplied Philips sheet was read in English from the multilingual English/French/German data, including operating voltage, plateau behavior, background count, timing, life, and construction data where published.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: -
Nominal heater voltage: -
Nominal heater current: -
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

GeigerMullerCounter

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Gas-filled radiation-counter section; counter-specific electrical characteristics are retained in TUBE_SECTION_PARAMETER.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

GeigerMullerCounter

Construction

Filling
Neon, argon and halogen quenching agent
Cathode wall thickness
80-100 mg/cm2
Cathode inside diameter
4.8 mm
Cathode effective length
16 mm

Capacitance

Interelectrode capacitance
1 pF

Other

Anode resistor
10 Mohm
Operating voltage minimum
375 V
Operating voltage recommended maximum
450 V
WideAmbientRange

Characteristics

Starting voltage minimum
295 V
Starting voltage maximum
335 V
Plateau slope typical
0.07 %/V
Vp=450-550V
Plateau slope maximum
0.15 %/V
Vp=450-550V
Shielded background maximum
2 counts/min
2inPb;1/8inAl
Expected count life minimum
50000000000 counts