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Post Your Cool Pic Here!

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Jrz126

Wed Dec 22 2010, 12:38PM

Registered Member #242 Joined: Thu Feb 23 2006, 11:37PM
Location: Erie PA
Posts: 210

Nice work Dalus! I love the watercooled HS.
Shouldn't be long til first light?

Adam Munich

Thu Dec 23 2010, 04:31AM

Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242

Not a pic, but cool nonetheless.

Dalus

Thu Dec 23 2010, 12:22PM

Registered Member #639 Joined: Wed Apr 11 2007, 09:09PM
Location: The Netherlands, Herkenbosch
Posts: 512

Jrz126 wrote ...

Nice work Dalus! I love the watercooled HS.
Shouldn't be long til first light?

Thanks, first light should be somewhere next year.

Killa-X

Thu Dec 23 2010, 04:12PM

Registered Member #1643 Joined: Mon Aug 18 2008, 06:10PM
Location:
Posts: 1039

I took about a hour if not more undoing over 100 screws taking apart my capacitor bank of 16 that I got on ebay. To make this system work as 450+450, for 900V, I have to undo the clamps and turn the caps. So I'm using this to clean the dust off, polish the metal plate, and so forth. Caps are 450V 2400uF each. Mallory.

Not sure why but something about a stack of capacitor looked cool enough for me to want to post it here

[Edit: Image size]

Adam Munich

Sat Dec 25 2010, 03:05AM

Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242

Hg is dense; it puts so much pressure on the glass it traps air. At least that's my hypothesis.

Conundrum

Sun Dec 26 2010, 02:34PM

Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062

interesting stuff, including EL sheet illuminated with uv, innards of RC car, colour wheel from DLP and a Â£1 microSD adaptor.

-A

Dalus

Sun Dec 26 2010, 07:13PM

Registered Member #639 Joined: Wed Apr 11 2007, 09:09PM
Location: The Netherlands, Herkenbosch
Posts: 512

allmost done

Fabio

Sun Dec 26 2010, 07:17PM

Registered Member #122 Joined: Fri Feb 10 2006, 12:55PM
Location: Milano Italy
Posts: 148

Hi All!

Some days ago i was invited to Geneve for visiting the CERN, this was a GREAT OCCASION to see and take photos of something of really exiciting!

I'm not sure if a pic of a magnetic dipole of the Large Hadron Collider could be considered "cool".........
.........if not, just add some superfluid liquid helium to cool it down to 1,7KÂ° and it will surely become a "really, really, really cool pic"

weeeeee..... this is me with a super electromagnet used for testing purposes, note the brand name!

Test bench for a magnetic dipole for the LHC; a spare dipole is installed over it.

cutaway of a LHC magnetic dipole.
When cooled with superfluid helium (1,7KÂ°) the Niobium-Titanium superconductor coils can be carry up to 17000 amperes without any losses and can generate a magnetic flux up to 8,3 Tesla

LHC spare parts (magnetic dipoles) on test benches

LHC spare parts (resonating cavities)

cutaway of a joint between two dipoles.
a defective solder between two superconductive wires had caused a huge failure of the entire system during the first tests:

-the magnetic field caused by the high current had caused high mechanical stresses on all joints

-a poorly made joint wasn't able to withstand the stresses and suddenly it broke interrupting the electric current on many electromagnets (all wired in series)

- the electromagnets responded to the quickly switch off of the current flow by generating an enormous back EMF causing a really powerful electric arc on the failed solder joint.

-the electric arc caused a quick evaporation of the superfluid helium wich caused an overpressure inside his tube; the safety valves was proved to be undersized and failed to release the helium quickly enough; the result was the tube explosion!!!!!

-since outside the tube there is a long chamber, under high vacuum for thermal insulating purposes, all liquid helium was sucked inside the vacuum chamber where it quickly evaporated again causing a pressure wave inside the vacuum chamber.

-the pressure wave had stripped away the thermal insulating layer that is entangled everywhere and cause huge damages over about 1.6 kilometers of accellerator....... in other words a small defective solder joint caused an enormous mess that required about 1 year to fix!

Now they use the accelerator at reduced power because they haven't no way to test all joints (more than 16000) other than give the full current on the coils and cross the fingers!!!!!!!!!

Trust me, the CERN is a must see place for every coiler, expecially who live in europe!
Anyway, this is a "post your cool pic here" theread, follow these links to see all photos of CERN laboratories!!!!!

Ciao!
Fabio.

Proud Mary

Sun Dec 26 2010, 08:20PM

Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992

Coo, Fabio, I wish I could have seen all that! What a treat!

Andyman

Sun Dec 26 2010, 11:42PM

Registered Member #1083 Joined: Mon Oct 29 2007, 06:16PM
Location: Upland, California
Posts: 256

A semi-gag gift from my uncle this Christmas.
Looks like a normal fuse right?

But look at it with a size reference, and....

It's says "Current Limiting Fuse type EJ-2" rated for 2400 volts and 80,000 amps

it's certainly the largest fuse i've ever seen in my life...

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