Pulse height analyzer for spectroscopy thermal multigate decay well logging system
Description
This paper describes improvement in a downhole logging tool in a sonde for making measurements of nuclear events occasioned by logging formations adjacent the well borehole wherein the nuclear events have variable frequency and amplitude and such nuclear events are measured by a measuring means which forms a measured signal, data conversion. It comprises: an input circuit for receiving the measured signal which represents the nuclear events, the input circuit including; amplifier means connected to the measured signal for forming an amplified output signal; base line restoring circuit means connected to the amplifier means for obtaining a regulated baseline value above which amplification by the amplifier means occurs; an A/D converter having an analog input connected to the amplifier means for receiving the amplified signal therefrom
Availability note (English)
Patent and Trademark Office, Box 9, Washington, DC 20232 (United States).Additional details
Publishing Information
- Imprint Pagination
- vp.
- IPC:
- Int. Cl. G01V 5/04.
- IPC
- Int. Cl. G01V 5/04.
- Patent number
- US patent document 5,055,675/A/
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 23053981
- Subject category
- S07: ISOTOPES AND RADIATION SOURCES; S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- ANALOG-TO-DIGITAL CONVERTERS; BOREHOLES; DATA PROCESSING; GAMMA SPECTRA; NEUTRON SPECTRA; NUCLEAR REACTION ANALYZERS; PULSE AMPLIFIERS; WELL LOGGING; WELL LOGGING EQUIPMENT
- Descriptors DEC
- AMPLIFIERS; CAVITIES; ELECTRONIC EQUIPMENT; EQUIPMENT; MEASURING INSTRUMENTS; SPECTRA