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Bartington Instruments Ltd. UK |
DUAL
Model JR-6 / JR-6A SPEED SPINNER MAGNETOMETERS
The world's most sensitive and accurate
instrument for measurement of remanent magnetization
of rocks based on classical (non-cryogenic)
principle. Two rotation speeds are available,
the higher one enabling the maximum sensitivity
to be reached, and the lower one enabling
the soft specimens to be measured.
Instruments enable measurement even of very
weakly magnetic sedimentary rocks including
limestone.
Operating Principles
Rock specimen rotates at a constant angular
speed in the pick-up unit inside a pair
of Helmholtz coils. In the coils an AC voltage
is induced whose amplitude and phase depend
on magnitude and direction of the remanent
magnetization vector.
Typical JR-6 / JR-6A Applications
Palaeomagnetism: The changes of Earth's
magnetic field in geological history can
be investigated through the measurement
of rock's remanent magnetization and the
investigation of its stability. These data
are also applicable to dating the age of
rocks, to solving some tectonic problems
or particular terrains (rotations of terrains,
microplates), to dating the developments
of mineralizations of ore deposits and to
many geological problems.
Archaeo-magnetism: The changes of
the Earth's magnetic field in human history
can also be investigated. These investigations
are mostly applicable to dating archeological
materials.
Magnetometry: In the interpretation
of ground or airborne magnetometric measurements
it is useful to know whether the rock's
magnetization is due to its induced or remanent
component. Investigation of remanent magnetization
can help to solve this problem.
Mineralogy: Using special capsule
enabling smaller irregular specimens to
be measured, impurities of ferromagnetic
grains in para- or diamagnetic minerals
can be investigated.
Model JR-6 / JR-6A Duel Speed Spinner
Magnetometer
Spinning
Sample inside the coil
Model LDA-3A : AF- Demagnetizer system
The LDA-3A AF Demagnetizer serves for demagnetizing
tumbling or static specimen by alternating
magnetic field.
The demagnetization process is microprocessor-controlled
and automated. One only sets up the demagnetization
parameters, fixes the specimen into the
specimen holder, and inserts the holder
into the demagnetization coil. The rest
of the demagnetizing process is performed
automatically following the pre-set parameters.
Triple mu-metal shielding provides an effecive
protection of the specimen from the Earth's
magnetic field. The electrical current for
producing the demagnetizing alternating
field is derived from the electrical net
current, filtered in such a way that all
the higher harmonic components that may
produce parasitic magnetizations are effectively
attenuated.
Microprocessor Controlled Demagnetization
Process, Two-axis Tumbling of Specimen
AMU-1 Enables Anhysteretic Magnetizing for
Investigation of Anisotropy of Remanence
Model
LDA - 3 AF De-Magnetizer
Click
to more
Mag-01
& Mag-01H Single Axis Fluxgate Magnetometers
Grad601
Single & Dual Sensor Magnetic Gradiometers
Magnetic
Susceptibility Instrumentation
Magnetic
Field Analysis and Data Acquisition system
Defence/Aerospace
Magnetometers
Grad-03-500M
Three-axis Marine Gradiometer
The
MFK1 Kappabridges
DUAL
Model JR-6 / JR-6A SPEED SPINNER MAGNETOMETERS
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