1. The Large Hadron Collider
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The Large Hadron Collider
CMS
Atlas
Point 5 – CMS
CERN
R = 4.5 km E = 7 TeV
2 proton rings housed in one tunnel
Completion: 2007…
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LHC

2. 11/18/2018
LHC radius
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LHC

3. 11/18/2018
1000 dipole magnets
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LHC

4. Experiment’s Solenoid
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Experiment’s Solenoid
Used to bend trajectory of charged particle’s produced in collision  i.e. Determine their momenta
B 
In this case, it is a cosmic-ray muon traversing the muon detectors, calorimeters, and the silicon tracker
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LHC

5. 11/18/2018
Eq.2
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LHC

6. The CMS Superconducting Solenoid
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The CMS Superconducting Solenoid
Provides bending power to measure charged particle momenta (a big showstopper if it didn’t work) 6m
B=4T
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LHC

7. Life in a Magnetic Field…
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Life in a Magnetic Field…
Chain following field line
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LHC

8. Helium clouds… Fast dump of 17.5 kA (3.5T field) in 3 minutes
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Helium clouds…
Fast dump of 17.5 kA (3.5T field) in 3 minutes
700m3 of helium released (about $10,000…)
Not seen: 6mm distortion of disks with 10g force when magnet is on
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LHC

9. Major Milestone for CMS Expt.
2000 ton solenoid and central steel yoke, lowered 100m, 10 hours, 20 cm clearance, and a slight sway….
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LHC

10. It Fits!
Some tourists
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LHC