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'[TECH] Helmholtz coil manufacturers'
I'm looking to buy a tri-axis helmholtz coil system and having a bit
of difficulty finding manufacturers of such systems with google, The
Ive found a couple, but the majority of the results are technical
papers and links to patent sites. Anyone know of any manufacuturers,
or a better search engine to use? Ive tried globalspec but that
returns nothing at all for "helmholtz"
M. Adam Davis
The second manufacturer there is one that Ive already emailed for more
information, and the first manufacturer site looks like it hasnt been
updated in a while, but I'll try to contact them.
On Tue, Aug 5, 2008 at 12:59 PM, M. Adam Davis <gmail.com> wrote: stienman
M. Adam Davis
Forrest W. Christian
|Are you trying to build a time machine?
Sorry, that was my first impression (meaning a "Helmholtz coil" sounds
like the type of weird concoction which would be part of a time machine
- you know right alongside the flux capacitor), and after looking at the
pictures of the gear and reading the datasheet at
http://www.meda.com/Data_Sheets/hcs01.pdf , I'm not 100% convinced that
a Helmholtz coil isn't the key component in either a time machine or
other similar devices.
After all, anything which includes the following description:
"In the open loop system, fixed currents are passed through the coils to
produce a coarse null in the control volume. The null is trimmed to its
final value under computer control. Precision control currents are added
to the fixed currents to generate accurate and stable uniform fields
within the control volume"
*has* to be from some science-fiction story. Especially when the
features include "Three Square Concentric Orthogonal Helmholtz Coils"
and "±200,000 nT Control Field Range."
So on a more serious note, what exactly do you use a Helmholtz coil
for? In the real world, that is...all of the purposes I could come up
with seem rather esoteric or more easily obtained in another way.
Jonathan Hallameyer wrote:
I had to look it up but it looks like it is simply an arrangement of
coils used to generate a very uniform magnetic field in a volume -
probably for science experiments and possibly medical instrumentation.
On Wed, Aug 6, 2008 at 2:56 AM, Forrest W. Christian <imach.com> wrote: forrestc
That's pretty much what I got from it... I was just wondering if there
was some non-obvious but useful application not in the realm of
scientific experiments as about the only thing I could figure out was
basically what you came up with - some esoteric science experiments and
perhaps testing certain sensors such as electronic compasses and the
like - although it would seem that most apps I can think of would not
require such a complicated device.
That doesn't change the fact that I love the fact that that when you
read the advertising slicks for real versions of this, they sound like
something which some science fiction writer would have just made up.
Sean Breheny wrote:
M. Adam Davis
Nasa has used them to remove magnetic fields from objects (ie, a
residual field on a piece of hardware going into space). You don't
want to go to the red planet and worry about ferrite gunking up your
mechanics or sensors.
You can use the coil to cancel out the Earth's magnetic field, and
then test CRT tubes inside it.
You can test sensitive electronic equipment in a strong varying field
before deploying it to a factory where it'll reside next to a monster
You can construct plasma balls inside it and know they aren't going to
zip around due to external fields (or make them move according to your
You can place atmoic clocks in them to make sure external fields are
compensated for and don't affect the accuracy of the clock.
You can use it with a very sensistive field detector in a closed loop
to enhance the sensitivity or range of the sensor.
On Wed, Aug 6, 2008 at 8:10 PM, Forrest Christian <imach.com> wrote: forrestc
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