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Quaesta Instruments

Quaesta Instruments. Tucson Arizona Founded in 2008 Staff: 10 Electronic devices: radiation detection environmental monitoring data logging telemetry Off-the-shelf and custom products. Products. Neutron Pulse Monitors Proportional gas detectors

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Quaesta Instruments

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  1. Quaesta Instruments • Tucson Arizona • Founded in 2008 • Staff: 10 • Electronic devices: • radiation detection • environmental monitoring • data logging • telemetry • Off-the-shelf and custom products

  2. Products • Neutron Pulse Monitors • Proportional gas detectors • Data logging devices • Environmental sensors • Mobile neutron detectors • Soil moisture monitoring stations • (radiation based)

  3. Neutron Pulse Monitor NPM

  4. Pulse Height Spectrum Classical 3He spectrum digitized over 128 bins

  5. Plateau Method Counting Plateau Lower discriminator

  6. Plateau Method • Requires many points for good resolution on discriminator set point • For low count rates, time per point may be large

  7. Multichannel Analyzer Lower Discriminator Upper Discriminator

  8. Setting the Discriminator Levels With a Multichannel Analyzer (MCA)

  9. Setting the Discriminator Levels With a Multichannel Analyzer (MCA)

  10. Setting the Discriminator Levels With a Multichannel Analyzer (MCA)

  11. Setting the Discriminator Levels With a Multichannel Analyzer (MCA)

  12. Setting the Discriminator Levels With a Multichannel Analyzer (MCA)

  13. Setting the Discriminator Levels With a Multichannel Analyzer (MCA)

  14. Setting the Discriminator Levels With a Multichannel Analyzer (MCA)

  15. Setting the Discriminator Levels With a Multichannel Analyzer (MCA)

  16. Setting the Discriminator Levels With a Multichannel Analyzer (MCA)

  17. Setting the Discriminator Levels With a Multichannel Analyzer (MCA)

  18. Setting the Discriminator Levels With a Multichannel Analyzer (MCA)

  19. Setting the Discriminator Levels With a Multichannel Analyzer (MCA) Peak Valley

  20. Setting the Discriminator Levels With a Multichannel Analyzer (MCA) Peak Valley

  21. Real Spectra

  22. Real Spectra

  23. Real Spectra

  24. He3 tube failure under thermal cycle testing

  25. Example of Field Neutron Detector System Failure, BF3 Detector Time Series

  26. Histograms before and after suspicious neutron counts Dirty Connector

  27. NPM Architecture

  28. Value of a Digital NPM • Computer interface • MCA & spectra - optimization • Monitoring • Data logging

  29. Data Logger • Analog & digital I/Os • Relays • USB, RS-232, SDI-12 • SD cards • Connect to NPMs • External Sensors • Telemetry

  30. Remote Monitoring & Mobile Detectors

  31. Remote Monitoring & Mobile Detectors

  32. Remote Monitoring & Mobile Detectors

  33. Roving Detector Data

  34. Roving Detector Data Noise produced by humidity

  35. Remote Monitoring & Mobile Detectors

  36. IAEA: Mobile Unit for Neutron Detection (MUNDs)

  37. IAEA: MUNDs NPM NPM: Ethernet + 15MHz input pulse counter

  38. Soil Moisture Monitoring Field scale soil moisture monitoring using cosmic ray neutrons Measures fast and slow neutrons Pressure & Humidity dependent Average Soil Moisture 600 meters

  39. Soil Moisture Monitoring • Challenges • Low power consumption • Very low count rate • High stability in calibration • required wide temperature range • High resolution pressure meas

  40. Soil Moisture Monitoring

  41. Soil Moisture Monitoring Alpine Location

  42. New Stuff

  43. Neutron Detector Arrays

  44. Neutron Detector Arrays

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