Magnetic Vacuum Control System

·        Automatic instantaneous magnetic vacuum control system

·        3 air-powered non-magnetic rotating coil sensors

·        Sensor sensitivity ± 0.1 nT

·        High quality magnetic vacuum (higher than 2 nT) in within 5 litres volume

·        Build-in furnace for TD demagnetization (up to 700°C)

MAVACS (Magnetic Vacuum Control System) apparatus was developed and constructed for automatic compensation of the ambient magnetic field, under normal conditions down to less than ±2 nT. It is suitable for thermal demagnetization of samples with metastable magnetic minerals (e.g. rocks containing micro-organic matter) and generally for weakly magnetic rocks (e.g. limestones applicable to  magnetostratigraphic studies). The MAVACS apparatus was found extremely useful for thermal demagnetization of larger sets of samples collected from regions with complicated thermo-tectonic history and which must be subjected to multi-component analysis of remanence. Such studies, supported by magnetomineralogical analyses of samples, are basic prerequisites for accurate and reliable derivation of palaeomgnetic (fossil) components of remanence. Detailed description of the MAVACS apparatus see in:  K. Příhoda, M. Krs, B. Pešina and J. Bláha, MAVACS - a new system creating a nonmagnetic environment for palaeomagnetic studies, in: Paleomagnetismo - Palaeomagnetism, Cuadernos de Geologia Iberica, E. Banda, ed., pp. 223-250, CSIC, Madrid, 1988-1989.

JR-6A Spinner Magnetometer

·        Rotation speed 87.7 rps / 16.7 rps

·        Measuring range up to 12500 Am^-1

·        Sensitivity 2 x 10-6 Am^-1 (high speed)

·        Automatic change of the holder position

·        Full computer control

JR-5A Spinner Magnetometer

·        Rotation speed 89.3 rps

·        Measuring range from 1.6 mAm^-1 to 1600 Am^-1

·        Sensitivity 2.4 x 10^-6 Am^-1

·        Automatic change of the holder position

·        Measurement computer control

KLY-4S CS-3

·        Bulk susceptibility measurement sensitivitivity 2 x 10^-8 SI

·        Anisotropy of Magnetic Susceptibility (AMS) measurement sensitivitivity 1.2 x 10^-8 SI

·        Low temperature range from 81 K to 293 K

·        High temperature range from 293 K up to 1073 K

·        Measurement in variable magnetic fields from 3 A/m to 450 A/m, RMS-values

·        Full computer control