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Magnetic disturbance

R

Robert Macy

Jan 1, 1970
0
The old dirty trick was somebody walking in with one of them super-magnets.
Magnetic stripe cards erased, CRT monitors changing color...
I do not think there is a natural magnetic effect that big,
unless you are located over an underground railway (tube).

Mains fluctuations?

I once took one of those super space magnets [so strong they can make
a Canadian dime stand on its edge through your hand] and held it close
to my old [favorite] monitor and wow what great color changes. only to
find the effects became permanent! not even ON/OFF cycling did a
thing. Then I remembered how energetic the fields from my cheap pencil
sharpener were, held it close to the screen, sharpened a pencil, and
voila! degaussed the nickel layer on the monitor making the color
better than before! whew! I was very looky I didn't permanently bend
or break that film, too.
 
J

John S

Jan 1, 1970
0
The old dirty trick was somebody walking in with one of them super-magnets.
Magnetic stripe cards erased, CRT monitors changing color...
I do not think there is a natural magnetic effect that big,
unless you are located over an underground railway (tube).

Mains fluctuations?

I once took one of those super space magnets [so strong they can make
a Canadian dime stand on its edge through your hand] and held it close
to my old [favorite] monitor and wow what great color changes. only to
find the effects became permanent! not even ON/OFF cycling did a
thing. Then I remembered how energetic the fields from my cheap pencil
sharpener were, held it close to the screen, sharpened a pencil, and
voila! degaussed the nickel layer on the monitor making the color
better than before! whew! I was very looky I didn't permanently bend
or break that film, too.

I got myself into the same situation years ago. I finally thought to use
my big Weller soldering gun as a degausser.
 
M

Mr Stonebeach

Jan 1, 1970
0
Superconducting NMR magnets are in a different league altogether. I know
of one where the outer shell has a dent from snatching the end of a
passing scaffold pole from outside the building.

Indeed. A colleaque of mine from Uni Genova told once how his
CRT computer screen bent and distorted like the clocks in the
"Persistence of Memory" every now and then, at the time his office
was above the big hall where some large magnets were tested. I think
those magnets were sections going to the Compact Muon Solenoid.

Regards,
Mikko
 
B

Bill Sloman

Jan 1, 1970
0
solar flares cause massive disturbances to the earth's magnetic field.

If your e-beams are low speed, circa 10-20kV and the run path is long,
it doesn't take much field to deflect the beam over 100nm down at the
target, which in today's geometries is HUGE!

It can be worse. In the 1980's Cambridge Instruments sold an electron
beam microfabricator to GE in the US, to a lab on the east coast. The
installation was doing fine until it came to final acceptanace tests,
when the patterns being written onto the silicon wafters started
showing intermittent step shifts of about half a micron - 500nm - and
nobody could work out why.

In a final desperate attempt to solve the problem our senior engineer
was flown over to America. He was a technology history buff and was
impressed when he got to the GE lab - it was an old building, and the
lift they used to get him up the electron beam microfabricator on the
first floor was a real antique, dating back perhaps 100 years, which
relied on hydraulic pressure to go up and down.

The cylinder which formed the floor of the lift was a very large
chunk of magnetic iron. When the lift was at the first floor, it
changed the magnetic field at the electron beam microfabricator enough
to shift the beam on the specimen by 500nm.

The solution to the problem was not to allow the lift to move while a
pattern was being written. The electron beam microfabricator sold for
a couple of million dollars, so there was quite a lot of money hanging
on the correct diagnosis.
 
R

rickman

Jan 1, 1970
0
??350hz?? Rather oddball powerline frequency..

Maybe it's on an airplane and the generator is running a bit slow...?

Rick
 
J

Jamie

Jan 1, 1970
0
Martin said:
They are. Or rather the planet has a pretty huge magnet inside it and
the solar wind can buffet it enough to cause trouble for sensitive gear.
More so in the US and Canada than in Europe since magnetic North is on
your side of the planet.

Any geomagnetic record for your neck of the woods would show if it was
from a CME event. This one goes back a few days

http://www.n3kl.org/sun/noaa.html

Place to look next time it happens.

You might want to make a simple magnetic disturbance monitor to
determine independent of your kit if there is a magnetic storm.
I was in work today and spent about 2 hours zeroing the sensor array
around each vault to get proper readings at the computer. What ever
happen the other day sort of corrected it self as for the E-Beam,
but the sensor array we have hanging around each vault did not fully
come back into zero alignment for what ever reason.

The sensors are something we constructed as a way to detect the
surroundings with in the critical areas of the E-beam to keep people,
metal objects and equipment from being place in proximity of the vault.

If you disturb the area around too much in the area where the E-beam
is housed, it will cause the beam to steer off and if bad enough cause
heating in the aperture, which isn't a good thing because it can also
cause .001" thick titanium window to heat unevenly and thus start a leak.

Heating of the aperture can propagate up the drift tube and bellows
which all have gaskets that leak when slightly aggravated.

So, we try to force the system to shut down at the slightest hiccup so
there won't be hours or lost time and repair work.

Jamie
 
J

Jamie

Jan 1, 1970
0
rickman said:
Maybe it's on an airplane and the generator is running a bit slow...?

Rick
It's quit obvious I meant Mhz, but you guys can play all you wish :)

And btw, is any one having issues when posting not reading ? It seems
lately if I post a message either a replay or new post, my ISP or who
ever is not responding and it times out, however, If I post message very
soon after I down load them, it seems that it goes through. It's almost
like they are putting me to sleep for uplinks?

The message I get is "There is no response from the news server, check
name, pass word etc."

When this happens, if I hit the send again, then most of the time it'll
work, but some times it may do a time out again.. It's very frustrating
because this software does not seem to have parameter to set the time ou
t to a much shorter wait.

I suppose I should be using a newer reader instead of this dinosaur.

Jamie
 
J

Joerg

Jan 1, 1970
0
Jamie said:
Once in a great while, we have a series of events where our machines
with beam scanning functions in them will all be steered out of place
enough to trigger alarms and shut the units down.

It does take a lot of magnetic disturbance to force these out of
alignment, but there is no other equipment adjacent, on the roof nor in
the ground. This area of operations are on ground level cement slab and
the roof is tin with nothing but static vents. Power feed transformers
are far away.. There was no near by strikes which has never cause this
in the passed.

The strange thing is, we had to wait ~ 20 mins for a restart because we
kept on getting an error in steering, on all the machines, then it
finally cleared up..

All these machines are independent of each other..

Is there any geological events that can take place to cause this in the
ground or maybe solar charge of some kind? It's almost like some one was
hanging a large magnet over our plant.

Do all of your employees know about the fact that they should not have
anything magnetic on them? I mean all, includings secretaries, janitor
crews, etc.

Reason I say that is that there are people who believe that slapping
magnetic patches onto aching joints or other body areas has a healing
effect.
 
R

rickman

Jan 1, 1970
0
It's quit obvious I meant Mhz, but you guys can play all you wish :)

Yes, in fact, I read MHz without noticing the typo until hifi-tek
posted. I just couldn't resist... lol

What is really bizarre is the response you got from that one guy. WOW!
I hope I never meet him in person.

And btw, is any one having issues when posting not reading ? It seems
lately if I post a message either a replay or new post, my ISP or who
ever is not responding and it times out, however, If I post message very
soon after I down load them, it seems that it goes through. It's almost
like they are putting me to sleep for uplinks?

The message I get is "There is no response from the news server, check
name, pass word etc."

When this happens, if I hit the send again, then most of the time it'll
work, but some times it may do a time out again.. It's very frustrating
because this software does not seem to have parameter to set the time ou
t to a much shorter wait.

I suppose I should be using a newer reader instead of this dinosaur.

Jamie

Is it a short term thing or has this been going on for a while?

Rick
 
R

rickman

Jan 1, 1970
0
Do all of your employees know about the fact that they should not have
anything magnetic on them? I mean all, includings secretaries, janitor
crews, etc.

Reason I say that is that there are people who believe that slapping
magnetic patches onto aching joints or other body areas has a healing
effect.

The magnets they use for that are usually the rubber, refrigerator type
that are barely magnetic. I can't imagine they will mess up this
equipment unless they are pretty close to it. I assume the vault itself
has restricted access.

One of my friends used to sell magnets for health. She claimed that she
cured people with them and truly believed in them. They cost a lot of
bucks too and were pretty worthless magnets. It is amazing how easy it
is to fool otherwise intelligent people with a little techno-babble.

Rick
 
J

Jamie

Jan 1, 1970
0
Joerg said:
Do all of your employees know about the fact that they should not have
anything magnetic on them? I mean all, includings secretaries, janitor
crews, etc.

Reason I say that is that there are people who believe that slapping
magnetic patches onto aching joints or other body areas has a healing
effect.

The education and common sense level of those that apply for jobs
these days are amazingly low. But we need to have business as usual.

There is generally no problem with those that operate the equipment,
it's those that aren't usually in that area, like material handers,
brain dead salary, people on tour and the general no nothing grease
monkeys and contractors.

The best one's are the truck drivers when they drop a load or back
straight into a vault wall. Cracks in the containment walls are not
generally a good thing.

Jamie
 
J

Jamie

Jan 1, 1970
0
rickman said:
Yes, in fact, I read MHz without noticing the typo until hifi-tek
posted. I just couldn't resist... lol

What is really bizarre is the response you got from that one guy. WOW!
I hope I never meet him in person.




Is it a short term thing or has this been going on for a while?

Rick
it's been going on for a while now. I thought it could of been my
network in my house popping up errors but I don't seem to have any
problems with mail or browsing? It's possible the non-tcp protocols
are getting lost due to errors on my end, who knows..

Jamie
 
B

Bill Sloman

Jan 1, 1970
0
The magnets they use for that are usually the rubber, refrigerator type
that are barely magnetic.  I can't imagine they will mess up this
equipment unless they are pretty close to it.  I assume the vault itself
has restricted access.

One of my friends used to sell magnets for health.  She claimed that she
cured people with them and truly believed in them.  They cost a lot of
bucks too and were pretty worthless magnets.  It is amazing how easy it
is to fool otherwise intelligent people with a little techno-babble.

Read up on the placebo effect.

http://en.wikipedia.org/wiki/Placebo
 
G

Gib Bogle

Jan 1, 1970
0
One of my friends used to sell magnets for health. She claimed that she
cured people with them and truly believed in them. They cost a lot of
bucks too and were pretty worthless magnets. It is amazing how easy it
is to fool otherwise intelligent people with a little techno-babble.

Rick

Relatively benign quackery, like homeopathy, in that it does nothing at all.
 
M

Martin Brown

Jan 1, 1970
0
it's been going on for a while now. I thought it could of been my
network in my house popping up errors but I don't seem to have any
problems with mail or browsing? It's possible the non-tcp protocols
are getting lost due to errors on my end, who knows..

Jamie

It is quite common these days at busy times for overworked and under
resourced newservers to respond with go away or not at all.

ISPs can't make money off Usenet and NNTP is expensive in resources.
 
L

legg

Jan 1, 1970
0
Once in a great while, we have a series of events where our machines
with beam scanning functions in them will all be steered out of place
enough to trigger alarms and shut the units down.

It does take a lot of magnetic disturbance to force these out of
alignment, but there is no other equipment adjacent, on the roof nor in
the ground. This area of operations are on ground level cement slab and
the roof is tin with nothing but static vents. Power feed transformers
are far away.. There was no near by strikes which has never cause this
in the passed.

The strange thing is, we had to wait ~ 20 mins for a restart because
we kept on getting an error in steering, on all the machines, then it
finally cleared up..

All these machines are independent of each other..

Is there any geological events that can take place to cause this in the
ground or maybe solar charge of some kind? It's almost like some one was
hanging a large magnet over our plant.
There are many ways to carry out a beam scanning function, so this
isn't really a good way to describe the nature of the victim
equipment. Is it microwave radar, laser, atomic particle - what type
of beam technology is being disturbed?

The different units may be independant, but they will still share
power and probably communications. If they are directed at the same
target, this is also a common factor. If they run on the same
software/firmware revision, in the same time zone, that's also a
commonality. The longer-term effects suggest SW that is not
particularly error tolerant.

If the 'flux differential array sensors' that went screwy at the same
time were indeed multiple and independent of the misbehaving
equipment, then it might mean something. If they're just parts of the
misbehaving equipment, their output is meaningless.

RL
 
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