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Questions and Answers
What is the warranty period for Ludlum products?
What is the warranty period for Ludlum products?
twelve months
What should you include when returning equipment to Ludlum Measurements?
What should you include when returning equipment to Ludlum Measurements?
The Model 44-2 gamma scintillator can be used in a wet environment.
The Model 44-2 gamma scintillator can be used in a wet environment.
False
The Model 44-2 detector does not contain any __________ materials.
The Model 44-2 detector does not contain any __________ materials.
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What is the typical sensitivity of the Model 44-2 gamma scintillator?
What is the typical sensitivity of the Model 44-2 gamma scintillator?
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What type of crystal is used in the Model 44-2 gamma scintillator?
What type of crystal is used in the Model 44-2 gamma scintillator?
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Which of the following voltage ranges do the Ludlum instruments support?
Which of the following voltage ranges do the Ludlum instruments support?
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What is the maximum relative humidity allowed for the Model 44-2 gamma scintillator?
What is the maximum relative humidity allowed for the Model 44-2 gamma scintillator?
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What factor may cause the Model 44-2 to under-respond?
What factor may cause the Model 44-2 to under-respond?
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What should you do if the detector fails to meet performance criteria?
What should you do if the detector fails to meet performance criteria?
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Study Notes
Ludlum Model 44-2 Gamma Scintillator
- The Model 44-2 is a sodium iodide (NaI) gamma scintillator used for detecting low levels of gamma radiation in the range of 20 keV–1.5 MeV.
- It consists of a 2.54 x 2.54 cm (1 x 1 in.) NaI crystal coupled to a photomultiplier tube and is housed in a 0.157 cm (0.062 in.) thick aluminum housing.
Specifications
- The detector is energy dependent, over-responding by a factor of 10 or greater in the 100 keV range and under-responding by a factor of 0.5 above 1 MeV when normalized to 137Cs.
- The recommended instrument input sensitivity is approximately 10 mV or higher.
- The detector does not contain any consumable materials.
Operating Procedures
- The detector operates with any Ludlum instruments or equivalent instruments that provide 500–1200 volts.
- To test the detector, ensure the instrument high voltage is at the proper setting, connect the detector to the instrument, and check for a proper background reading.
Safety Considerations
- The detector can be used in indoor or outdoor environments with a temperature range of -20 to 50 °C (5 to 122 °F) and a maximum relative humidity of less than 95% (non-condensing).
- Cleaning instructions: use a damp cloth with water as the wetting agent, turn the instrument electronics off, allow the instrument to sit for one minute, and disconnect the detector cable before cleaning.
Parts List, Drawings, and Diagrams
- The detector consists of various components, including the detector body, end cap, NaI crystal, tube socket assembly, tube shield, connector, and O-ring.
- The tube socket board includes a circuit board, capacitors, and resistors.
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Description
This quiz covers the operation and maintenance of the Ludlum Model 44-2 Gamma Scintillator. It includes information on the device's specifications, warranty, and technical details.
