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The Intersecting Storage Rings (ISR) was the world's first hadron collider. It operated from 1971 to 1984 and held the record luminosity for hadron colliders till 2004. The ISR hosted the first superconducting quadrupole magnets. The ISR low-$\beta$ quadrupole magnets were part of a luminosity upgrade program. The coils were wound using a rectangular Cu/Nb-Ti wire, enamel insulated, and were epoxy impregnated. Glass-epoxy bands kept the coils together in the quadrupole configuration and withstood the electromagnetic forces.

The Hadron-Elektron-Ringanlage (HERA) collided protons with energies up to 920 GeV with electrons or positrons with energies up to 27.5 GeV. It operated from 1992 to 2007, probing the internal structure of the proton. Many of the features of the HERA superconducting magnets became standards for later projects. The HERA ring was installed in a 6.3 km tunnel at Deutsches Elektronen-Synchrotron (DESY) Laboratory, Hamburg (Germany).

Pauli's withdrawal of "On the Isospingroup in the Theory of Elementary Particles". Renounce to publish a common paper with Heisenberg on the subject.Manuscript

W. Heisenberg wrote to H. Kita about some mathematical problems he encountered (wrong sign in an equation and possibility of omission of a term in a conventional derivation of the Bethe-Salpeter equation). See also 1/530.Letter

Calculations by Källén (Lorentztransformation, Hilbert-space I and II, Lagrangefunktion).Calculations

Calculations.Calculations

Pauli make some comments and reflections on the situation in the quantum theory of fields.Manuscript

Notes by W. Pauli.Notes

Calculations related to a letter from Heisenberg, 15th March [1958].Calculations

Calculations.Calculations