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120 tonnes of liquid helium in use at the Large Hadron Collider, cooling 36'000 tonnes of superconducting magnets to just 1.9 degrees above absolute zero. The cryogenic valves were designed for the needs of CERN to develop valves for use with the very low temperature of liquid helium.

The crystals used in CMS’s electromagnetic calorimeter may look like simple bricks of glass, but they are in fact mostly metal and are heavier than steel! Lead tungstate crystal with a touch of oxygen in this crystalline form is highly transparent and scintillates when electrons and photons pass through it. This means it produces light in proportion to the particle’s energy. CMS contains nearly 80’000 such crystals, each of which took two days to grow. This technology developed at CERN has applications in medical imaging, for example improving cancer diagnosis. The Compact Muon Solenoid (CMS) is a general-purpose detector at the Large Hadron Collider (LHC).

Notes on a book by Cyril Bailey. Ancient Greece, mathematics.Notes

Notes and calculations.Calculations

Equations to be made on slides. Regularization, vacuum polarization, spin zero particles.Notes

[MISSING ?]Manuscript

Notes on Lorentz groups.Notes