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This folder contains a list, and the career record, of junior members, in alphabetical order:

This folder contains a list and some documents about guests, in alphabetical order:

This folder contains: Interim Finance Committee (IFC) documents: CERN-IFC-1 to CERN-IFC-51:CERN-IFC-

The THC collection contains documents on the creation of CERN, and about the organisation and activities of the Theory Group in Copenhagen. It includes correspondence, reports and memoranda. The TH collection contains the files of Jacques Prentki, Jacob Maurice and John Ellis on the Theory Division. Jacques Prentki: joined Bernard d'Espagnat, the first CERN theorist in January 1955. He came from Leprince-Ringuet's Laboratory at the Ecole Polytechnique in Paris. He was nominated leader of Theory Division from 1966 to 1969 and from 1976 to 1981. His field of interest was QCD (Qunatum Chromodynamics), and grand unified theories. Maurice Jacob: was head of TH division from 1982 to 1988. A tireless research compaigner, he has also served as President of the French Physical Society in 1985 and as President of the European Physical Society from 1991 to 1993. Maurice also left his mark on scientific publishing, where he worked with leading North Holland/Elsevier journals from 1968 to 1985. His field of interest was particle physics, space physics, physics and society. * John Ellis: joined CERN in 1973. He was the leader of the TH Division from 1989 to 1993. John Ellis published over 700 scientific articles in particle physics and related areas of cosmology and astrophysics. His research interests included the possible experimental consequences and tests of new theoretical ideas such as gauge theories of strong and electroweak interactions, grand unified theories, supersymmetry, and string theory. He was awarded the Maxwell Medal of the Institute of Physics in 1983 and was elected a fellow of the Royal Society in 1985. Honorary Doctorate, University of Southampton, 1994. It includes administrative, personnel, technical subjects (correspondance, notes, reports, documents on rules and regulations, staff recommandations, fellows and visitors, PS improvement programme…)

This collection contains working files and correspondence. It includes correspondance with Jon Magne Leinaas about some articles: Electrons as accelerated thermometers" written by Jon Magne Leinaas and John Stewart Bell in July 1982 – CERN-TH-3363 The Unruh effect in extended thermometers in July 1984 - CERN-TH-3948 * The Unruh effect and quantum fluctuations of electrons in storage rings in June 1986 – CERN-TH-4468 The collection also contains transparencies of the Symposium on quantum physics in memory of John Stewart Bell, New aspects of Bell's Theorem held at CERN, 2-3 May 1991. The participants were A. Shimony, J. M. Leinaas, K. Gottfreid, H. Rauch, A. J. Leggett, A. Aspect, G. C. Ghirardi, and R. Jackiw To see Videos and transparencies of participants http://cds.cern.ch/record/226299 There are also a few photos, one VHS cassette and some punched cards.

Before the days of electronic detectors, visual techniques were used to detect particles, using detectors such as spark chambers and bubble chambers. This plexiglass lens was used to focus the image of tracks so they could be photographed.