Paleomagnetism and Marine geology

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français : Magnétomètre cryogénique SRM-755

Cryogenic magnetometer

Friday 22 February 2008

This state-of-the-art magnetometer is designed to measure very small magnetic variations in continuous u-channel samples at 1 cm intervals. The magnetometer is equipped with three SQUIDS (Superconducting QUantum Interference Device Sensor) that are cooled to six Kelvins with a new type of cryogenic compressor.


2G-Enterprises SRM-755 cryogenic magnetometer.


This instrument measures magnetic variations as small as 1e-8 A/m on U-channel samples. The magnetometer can measure the Natural Remanent Magnetisation (NRM) and is equipped for Alternating Field (AF) demagnetization.


Coils used to generate the strong alternating fields.


Other modules were added for the induction of other types of magnetization.

  • Module to induce Anhysteretic Remanent Magnetization (ARM) : This module is used to induce an ARM on the u-channels.


    Module to induce Anhysteretic Remanent Magnetization (ARM)


  • Module to induce Isothermal Remanent Magnetization and Saturated Isothermal Remanent Magnetization (IRM et SIRM) : This module allows to induce Isothermal Remanent Magnetization (IRM) or Saturated Isothermal Remanent Magnetization (SIRM) on the u-channels using a magnetic current with a miximum of intensity of 1 Tesla.


    Module to induce Isothermal Remanent Magnetization and Saturated Isothermal Remanent Magnetization (IRM et SIRM)


  • Module to measure magnetic susceptibility : This module determine volumetric magnetic susceptibility of the sediment with the same resolution than paleomagnetic data (1 cm) of the cryogenic magnetometer.


    Module to measure magnetic susceptibility

    • University of Quebec at Rimouski

    Research laboratory in

    paleomagnetism and marine geology

    Mailing address

    310 Allée des Ursulines, C.P. 3300

    Rimouski (Québec) G5L 3A1

    CANADA

    Telephone & email

    Ph: +1 (418) 724-1650 poste 1741

    Guillaume_St-Onge@uqar.ca
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