 Ludlum Model
43-135
Large Area Radiation Source 2 pi Calibration Detector
Introduction
The Ludlum Model 43-135 is a large area 2 π
proportional radiation detector designed for calibrating large area alpha and beta
radiation sources. The windowless detector and gold plated source tray are sealed
together via heavy duty clamps which permit operating at higher pressures up
to 0.2 MPa. This detector design is in use at the National Institute of
Standards and Technology (NIST) and has demonstrated superior beta response
and counting statistics with uncertainties in the range of approximately
0.1%.
Specifications
PART NUMBER:
47-3466
PERFORMANCE
Alpha background: ~ 0.0558 cps
Beta background: ~ 27.4 cps
Measurement uncertainty ~ 0.1%
Detector homogeneity response: ± 0.2%
DETECTOR
Detector area: 9.8” x 7.9” (25 cm x 20 cm)
Operating voltage: < 5000 Vdc
Plateau length: >200 volts with a slope of ~1%, typical plateau from 1200 to
2700 volts
Typical count rates: 10 to 2000 cps
Detector connector: Hermetically sealed SHV connector (Ceramaseal part number
9263-06A or equivalent)
Detector assembly seal: Viton O-Ring
PRESSURE REQUIREMENTS
Working pressure: 22.1 to 29.4 PSIA, 1.5 to 2 atmospheres absolute (152.4 -
202.8 kPa)
Maximum pressure: 45 PSIA (310.3 kPa)
Equipped with:
Counting gas valves for inlet and outlet
Pressure relief valve for over pressure protection
Pressure gauge, 30” to 30 PSI range (vacuum to 30 psig)
PHYSICAL
Size: 21” deep x 17” wide x 7.2: high (53.3 cm x 43.2 cm x 18.3 cm)
Maximum source dimension: 8.5” x 5.5” 0.5” tall (21.6 cm x 14 cm x 1.3 cm)
Weight: 82 lbs (37.2 kg)
Technical Information
Other Ludlum Products
Ludlum Information
For more information or to request a quotation,
please contact us
by phone at: (865)
947-5123 or by email at:
sales@deqtech.com.
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