3 November 2008 D.Acosta 1 Most Powerful Solenoid Magnet u 18kA, 3.8T solenoid u 3m radius, 15m length u 2.5 GJ stored energy u Can be discharged in a.

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Presentation transcript:

3 November 2008 D.Acosta 1 Most Powerful Solenoid Magnet u 18kA, 3.8T solenoid u 3m radius, 15m length u 2.5 GJ stored energy u Can be discharged in a controlled fast dump in several minutes u Tested successfully in 2006 and 2008 u Effect of significant in- situ fringe fields necessitated additional securing of objects B

3 November 2008 D.Acosta 2 CMS Completed! August 25, 2008 – 16 years after its Letter of Intent 2 Ready for the LHC Some issues here

3 November 2008 D.Acosta 3 Huge Toroidal Magnet System B

3 November 2008 D.Acosta 4 Sept.10, 2008

3 November 2008 D.Acosta 5 Large Hadron Collider, near Geneva, Switzerland CERN CMS Geneva

3 November 2008 D.Acosta 6 A Proton Collider (“Atom smasher”)

3 November 2008 D.Acosta 7 The Large Hadron Collider (LHC) n 7 TeV on 7 TeV proton-proton collider, 27km ring u 7 times higher energy than the Tevatron at Fermilab l Aim for 5 TeV for 2008 u 100 times higher design luminosity than Tevatron (L=10 34 cm -2 s -1 ) n 1232 superconducting 8.4T dipole T=1.9ºK u Largest cryogenic structure, 40 ktons of mass to cool n 4 experiments u ATLAS, CMS u ALICE, LHCb n Start Date: Sept. 10, 2008

3 November 2008 D.Acosta 8 Uniform Circular motion B v r Actually about 4.5km with straight sections included

3 November 2008 D.Acosta 9 LHC Tunnel and Dipole Magnets u 15 m long magnets with unique single structure for 2 beams u Cooled with superfluid helium

3 November 2008 D.Acosta 10 The Real Tunnel

3 November 2008 D.Acosta 11 The Excitement of First LHC beams!

3 November 2008 D.Acosta 12 Beam Splash Event

3 November 2008 D.Acosta 13 UF Celebration in the CMS Control Room, 11pm

3 November 2008 D.Acosta 14 Unfortunately… n An major malfunction on Sept.19, 2008 means that we’ll be restarting once again in Sept Electrical arc vaporized beam pipe, released tons of helium, leading to chain reaction of forces…

Some Misconceptions about the LHC Geneva tabloid

3 November 2008 D.Acosta 16 n The LHC will create mini-black holes that will destroy the Earth u If more dimensions exist to allow their production, Hawking radiation will cause them to decay immediately u Collisions at energies above the LHC have occurred in our atmosphere over eons, so any BHs that are stable have been benign u See also: J. Ellis et al., “Review of the safety of LHC collisions”, J. Phys. G: Nucl. Part. Phys. 35 (2008) Doomsday scenarios…

3 November 2008 D.Acosta 17 This is a work of fiction

3 November 2008 D.Acosta 18 n But the CERN laboratory has been very supportive of the upcoming movie (and offering clarifications…)