Natural Gamma Radiation Logger (NGRL) Quick Start Guide

Introduction

This quick start guide is designed to help participants quickly learb Anchor_GoBack_GoBackn learn how to use the NGRL to acquire data, load it to the laboratory information management system (LIMS), and retrieve it again. It is not intended to replace the user guide.
The NGRL instrument detects gamma events resulting from the decay of radioactive nuclides in the material under study.
See NGRL Users Guide and Technical Note 26: Physical Properties handbook for additional detail.

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1. Load a section for analysis. Seat the section in the titanium boat (Figure 2). The blue end cap ("top") should be near the NGRL door opening. The barcode label is visible, ready to be scanned; it does not matter whether the archive- or working-half label is scanned.

Bottom of Core (CLEAR)Top of Core (BLUE) Image RemovedImage Added

Figure 2: Core section sitting in the loading tray.

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Figure 4: Sample Information Window. Scan section label, information is parsed out into the Sample ID and LIMS ID fields. The 'User Length' field (red square) requires input in order to run a measurement.

1. Ensure the cursor is in the Text ID field and scan either of the core section's barcode labels, A-half or W-half work equally well. Check to be sure all sample information has populated the windows properly. If the experiment is run with incorrect sample information the section will need to be rescanned.
2. Enter sample length observed into the 'User Length' field. Round the sample length to the nearest whole cm. Be careful to observe the actual length of the material in the core liner, not just the end cap and to be consistent in how length is determined from measurement to measurement. The "Measure" button will become available once the user has clicked out of the user length field.
3. Click MEASURE. This starts the automated measurement: the boat moves to the home position, and then moves to measurement position two and begins measurement. Approximately halfway into the measurement, the boat is pulled out 10 cm to measurement position one (this will not occur if the user has chosen only to measure one position on a high-recovery cruise). The bar on the left side of the screen tracks the progress of each measurement (Fig 5. Outlined in red)

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