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- Check the vital signs of the Cryogenic Magnetometer. Use the electronics interfaces to measure the vital signs inside the magnetometer: SQUID temperature and shield temperature. Record the values on the log sheet (found in the Lab Notebook /wiki/spaces/LN/pages/7338168246).
- Check water level and condition inside the Haskris. Check the CryoWATCH software to monitor the compressor oil and water temperatures. Create a new log file for the expedition in C:\Users\daq\Desktop\Cryo Logs. For more detailed instructions refer to the SRM user guide.
- If a service call is scheduled, make sure you prepare all supplies necessary for it. Find the service representative.
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- Measure the interior field of the magnetometer using the 3-axis fluxgate ("field profile"). Use the DAFI utility in the IMS-SRM software. Save the excel file to IODP Share: Pmag_Documents: SRM: Field Profiles. Each file should be labeled with the date of measurement.
- If it is necessary to heat the SQUIDs to release a trapped field, follow the field trapping procedure in the user guide.
- Check the field produced by the degauss coils within the SRM using the axial and transverse Hall probes
- Introduce scientists to the cryomagnetometer and run basic measurements, such as:
- Clean the tray and demagnetize at a field of 30 mT or higher and measure the tray. Measure the tray as a fake sample and compare results to ensure corrections are done properly. This should be done with the section half and, if applicable, the discrete tray.
- Conduct positioning tests along the track with a section half tray. Testing should be done with an empty, light tray and a weighted, heavy tray. Check discrete boat positioning as well.
- Measure a split core or play core.
- Check to see if any regular maintenance projects need to be completed. Specifically check if the adsorber in the Cryomech compressor is due for replacement. If the bi-annual replacement of the adsorber is required, swap the entire Cryomech compressor with the spare compressor. Record the date of the change (place sticker on compressor).
- Provide safety tour to all scientists who work in the Paleomagnetic lab area. Ensure all scientists understand the safety concern and sign sign document required
III. SITE PREPARATION - Prior to arrival on site and core on deck
The following is a list of actions that should be accomplished prior to arriving at the first site. On cruises with short transit times before reaching the first site it is advisable to perform as many of the preparations in port as possible.
Paleomagnetics Lab
- Complete instrument checks by running basic measurements with the Kappabridge, JR6, and Cryogenic magnetometer to ensure instruments are functioning properly.
- Measure QAQC standards - pmag cubes with both JR6 and SRM, and empty SRM tray. Confirm that the data are consistent with previous expeditions with QCViewer. See Confluence Page QAQC Paleomagnetism Standard Operating Procedure for details.
- If core orientation is scheduled for your cruise, then replace all 9V batteries in the TransIT adapters on the two Flexit computers. If you are planning to use the MI5 Icefield tools, make sure the Palms are charged and batteries are available for each tool. Do not put the batteries in the tools until ready to start a survey. Download data from the tool to the PC to ensure data transfers are working.
- Train the scientists in the operation of the instruments used the most (e.g., Cryogenic Magnetometer, Agico spinner, Kappabridge magnetic susceptibility system).
- Go over the various software packages with the Paleomagnetics scientists (e.g., SRM, Dtech2000, Rema6, Kappabridge programs, and Puffin Plot). It is especially important to familiarize the scientists with the operation of the SRM. The User Guide and Quick Start guide can be found on IODP Share.
- The scientists may want to use specific software for coding or processing data. Check with them prior to arrival on site and facilitate software installation if necessary.
- Remove any old or replicated SRM measurement sequences from C:\IMS\SRM CONFIG\Measurement Sequence\User
- Clear out extraneous sample shape presets from the IMS-SRM software and make sure the appropriate presets for the expedition are available.
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The following is a list of actions that are accomplished once on site by technicians alone or cooperatively with the scientists assigned to the laboratory for an expedition.
A. SAMPLING
The basic magnetic measurements are conducted on whole/split sections and discrete samples:
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- Continue processing cores through the lab as described above
VI. DURING EXPEDITIONS
- Receive core and assist as needed in the core lab (i.e. splitting, restocking, boxing core, disposing of trash, and general cleaning and maintenance of core lab). Remember, the core lab is your primary duty and other duties come secondary to that unless arrangements are made with the Lab Officer to meet special objectives. For details on Core lab responsibilities refer to the Core lab SOP.
A. MAINTENANCE
In the Paleomagnetics Lab, a lot of the maintenance takes place on a daily or weekly basis during the expeditions as partially listed in the section above. However, for some instruments, maintenance is only required on a monthly or quarterly or yearly basis. The end of expedition maintenance is a must.
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