High Throughput Pulse Height Analyzer
AssigneeSchlumberger Technology Corporation
InventorBruno Jorion
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Abstract
A method and system for acquiring spectral information from an energy sensitive nuclear detector is disclosed. The method includes detecting nuclear radiation at a detection device and generating an electronic input pulse indicative of energy deposited in the detection device. The method further includes integrating the electronic input pulse at an integrating device to produce an integrated output signal and digitally sampling the integrated output signal of the integrating device at intervals to produce a stream of digital samples. The method further includes resetting the integrator synchronously with a sampling clock when a limit condition is reached.
Claims41
A method for acquiring spectral information from an energy sensitive nuclear detector comprising:
- detecting nuclear radiation at a detection device and generating an electronic input pulse indicative of energy deposited in the detection device;
- integrating the electronic input pulse at an integrating device to produce an integrated output signal;
- digitally sampling the integrated output signal of the integrating device at intervals to produce a stream of digital samples;
- and
- resetting the integrator synchronously with a sampling clock when a limit condition is reached.
An apparatus for acquiring spectral information from an energy sensitive nuclear detector, comprising:
- electronic means for detecting nuclear radiation and generating an electronic signal indicative of the energy deposited in a detection device;
- an integrator for integrating the electronic signal indicative of the energy deposited in a detection device;
- electronic means to digitally sample the output signal of the integrator at an interval to produce a digitized pulse stream;
- electronic means for obtaining the integral of the electronic signal from the digitized pulse stream and resetting the integrator synchronously with a sampling clock when a limit condition is reached.
A downhole tool for acquiring spectral information, comprising:
- a generator configured to emit nuclear radiation into an earth formation surrounding a borehole;
- a nuclear detector, and;
- data processing circuitry configured to detect nuclear radiation and generate an electronic signal indicative of the energy deposited in a detection device;
- data processing circuitry configured to integrate the electronic signal indicative of the energy deposited in a detection device to produce an output signal;
- data processing circuitry configured to digitally sample the output signal at an interval to produce a digitized pulse stream;
- data processing circuitry configured to obtain the integral of the electronic signal from the digitized pulse stream and reset the data processing circuitry for integrating synchronously with a sampling clock when a limit condition is reached.
Dependencies are inferred from the claim text.