Most Powerful Solenoid Magnet
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3 Novembe r 2008 D.Acosta 1 Most Powerful Solenoid Magnet 18kA, 3.8T solenoid 3m radius, 15m length 2.5 GJ stored energy Can be discharged in a controlled fast dump in several minutes Tested successfully in 2006 and 2008 Effect of significant in-situ fringe fields necessitated additional securing of objects B
description
B. Most Powerful Solenoid Magnet. 18kA, 3.8T solenoid 3m radius, 15m length 2.5 GJ stored energy Can be discharged in a controlled fast dump in several minutes Tested successfully in 2006 and 2008 Effect of significant in-situ fringe fields necessitated additional securing of objects. - PowerPoint PPT Presentation
Transcript of Most Powerful Solenoid Magnet
3 November 2008
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Most Powerful Solenoid Magnet 18kA, 3.8T solenoid 3m radius, 15m
length 2.5 GJ stored energy Can be discharged in
a controlled fast dump in several minutes
Tested successfully in 2006 and 2008
Effect of significant in-situ fringe fields necessitated additional securing of objects
B
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CMS Completed!August 25, 2008 – 16 years after its Letter of Intent
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Ready for the LHC
Some issues here
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Huge Toroidal Magnet System
B
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Sept.10, 2008
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Large Hadron Collider, near Geneva, Switzerland
CERN
CMSGeneva
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A Proton Collider (“Atom smasher”)
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The Large Hadron Collider (LHC) 7 TeV on 7 TeV proton-proton collider, 27km ring
7 times higher energy than the Tevatron at Fermilab Aim for 5 TeV for 2008
100 times higher design luminosity than Tevatron (L=1034cm-2s-1)
1232 superconducting 8.4T dipole magnets @ T=1.9ºK Largest cryogenic structure, 40 ktons of mass to cool
4 experiments ATLAS, CMS ALICE, LHCb
Start Date:Sept. 10,2008
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Uniform Circular motion
7 TeV8 T
3 km
prqB
pBr
B
v
r
Actually about 4.5km with straight sections included
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LHC Tunnel and Dipole Magnets
15 m long magnets with unique single structure for 2 beams
Cooled with superfluid helium
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The Real Tunnel
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The Excitement of First LHC beams!
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Beam Splash Event
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UF Celebration in the CMS Control Room, 11pm
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Unfortunately… An major malfunction on Sept.19, 2008 means that
we’ll be restarting once again in Sept. 2009
Electrical arc vaporized beam pipe, released tons of helium, leading to chain reaction of forces…
Some Misconceptions about the LHC
Geneva tabloid
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The LHC will create mini-black holes that will destroy the Earth
If more dimensions exist to allow their production, Hawking radiation will cause them to decay immediately
Collisions at energies above the LHC have occurred in our atmosphere over eons, so any BHs that are stable have been benign
See also: J. Ellis et al., “Review of the safety of LHC collisions”,J. Phys. G: Nucl. Part. Phys. 35 (2008) 115004
Doomsday scenarios…
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This is a work of fiction
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http://cern.ch
But the CERN laboratory has been very supportive of the upcoming movie (and offering clarifications…)
![MuCool Superconducting Solenoid Quench …...Index Terms— Superconducting solenoid, Magnetic field, Quench, 3D simulations, Test Stand. I. INTRODUCTION HE MUCOOL experiment [1] magnet](https://static.fdocuments.net/doc/165x107/5e92b2bd1d72c02008514bd1/mucool-superconducting-solenoid-quench-index-termsa-superconducting-solenoid.jpg)
