GR-820 Airborne Gamma Ray Spectrometer

Overview

The GR-820 is a 256 or 512 channel gamma ray spectrometer used for the detection and measurement of low-level radiation from naturally occurring Potassium, Uranium and Thorium, as well as man-made radioactive sources. It has an input capacity for large volumes of crystal detectors (up to 64L or 4096 in³), a specification necessary for airborne geological mapping and the location of minerals.

Applications

• Geophysical

Features

Simplicity is at the heart of the GR-820 system. The spectrometer system is a stand-alone design featuring its own large and highly visible front panel graphics display. Easy to use step-through menus guide an operator through system set-up and daily calibration checks. See Photo

One of the main features of the GR-820 is the automatic gain stabilization control technique, which eliminates special drift, without the need for temperature controlling the detectors. Sophisticated signal processing techniques automatically perform digital gain control to the individual crystal spectra, ensuring that when all of the spectra are summed, the resulting spectrum is stable over the entire flight.

An added feature of the GR-820 is that it incorporates special electronic circuitry and software to significantly reduce the effects of pulse pile-up. The undesirable condition is the result of pulses occurring simultaneously or very close together and if not corrected will produce false energy levels when summed.

The GR-820 makes interfacing to data acquisition systems quick and easy through a variety of output data types; RS232, IEE-488, parallel (3 types) and analog, all of which come standard. In addition, there is full computer remote control capability, an important feature enabling minimal crew operation.

Benefits

The GR-820 Airborne Gamma-Ray Spectrometer has become the choice of professionals for one simple reason - when flying surveys in remote areas of the world under extreme conditions, high quality data and reliability are obtained, the first time. See photos of the GR-820 Airborne Gamma-Ray Spectrometer in use See Photo 1, See Photo 2.