18503

Philips self-quenching Geiger-Müller radiation counter for ionizing-radiation measurement. Its manufacturer data characterize stable counting operation through specified threshold, plateau, background, timing, and detector-life limits.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

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

Description

Self-quenching Geiger-Muller radiation counter for gamma and neutron measurement; thermal-neutron use is supported with external cadmium foil.

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

Max plate voltage: 425 V

Published ratings and characteristics promoted semantically from the approved Philips source.

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

1957 Philips Receiving and Amplifying Tubes

Published operating points and test conditions from this source.

SECTION 1

GeigerMullerCounter

Characteristic

Starting Voltage Maximum
325 V
Plateau Length
250 V
Minimum Plateau Length
225 V
Beginning of Plateau Maximum
425 V
Plateau Slope Maximum
0.02 %/V
At published counting condition
Dead Time Maximum
100 us
Background Count Maximum
20 counts/min
Published shielding condition
Count Life Expectancy Minimum
50000000000 counts

Other

Maximum Ambient Temperature
75 C

Data set 02

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
250 mg/cm2
Cathode inside diameter
14.4 mm
Cathode effective length
40 mm

Capacitance

Interelectrode capacitance
2 pF

Characteristics

Starting voltage minimum
275 V
Starting voltage maximum
325 V
Beginning of plateau maximum
425 V
Plateau length minimum
225 V
Plateau slope typical
0.01 %/V
Plateau slope maximum
0.02 %/V
Dead time maximum
100 usec
Shielded background maximum
10 counts/min
2inPb;1/8inAl
Expected count life minimum
50000000000 counts