헬름홀츠 코일 ( helmholtz coils )
Precise uniform magnetic fields
균일한 자기장을 얻는 특수 제작형 헬름홀츠 코일- 미국 워커사 제품
HELMHOLTZ COILS
The Helmholtz coil system concept, developed over a century ago,
is a system that is normally used to generate magnetic field levels
of specified volume and uniformity. These coils provided scientists
and engineers accurate means to perform numerous experiments
and testing functions that require a known ambient magnetic field.
Helmholtz field generation can be either static, time-varying DC or
AC, depending on applications requirements.
Applications range from cancelling the Earth’s magnetic field for
certain experiments as well as generating magnetic fields for
applications such as determining magnetic shielding effectiveness,
determining the susceptibility of electronic equipment to magnetic
fields, calibration of magnetometers and navigational equipment
and for many bio-magnetic studies, just to name a few.
TYPICAL APPLICATIONS
• Generation of precise-controlled magnetic field
• Magnetometer and Hall probe calibration
• Earth’s field cancellation for zero-field tests
• Calibration for navigational equipment
• Susceptibility measurements
• Magnetoresistance measurement
• CRT adjustments
HELMHOLTZ DESIGN REQUESTS
The combined values of Laboratorio Elettrofisico
experience, reliability, quality and performance has
resulted in the production of many proven AC and DC
Helmholtz coil system designs. Single, Biaxial or Triaxial
Helmholtz Coils with single or multi-pair coil sets, fixed or
rotatable, are offered in round, square or rectangular
configurations.
Field levels from the gamma range (1 gamma = 1 nT = 10–5 G)
to the kilogauss level can be generated with uniformity in
parts per million (ppm) over a specified sample volume.
Information related to any Helmholtz design request
should be provided by completing a list of specifications,
such as:
- Field Volume and the shape and size
- Field orientation (single, double or three axes)
- Field strength
- Field uniformity
- Field frequency (DC or max AC frequency)
- Physical spacing between coils
- Duty Cycle
- Available power source, if any
- Necessary accessories: power source, gaussmeter,
control software, etc.
LE USA Walker LDJ Scientific Inc, 150 years Magnetic Solution.
mis_01_helmholtz_coils.pdf
