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<!--HTML-->Antiproton target used for the AA (antiproton accumulator). The first type of antiproton production target used from 1980 to 1982 comprised a rod of copper 3mm diameter and 120mm long embedded in a graphite cylinder that was itself pressed into a finned aluminium container. This assembly was air-cooled and it was used in conjunction with the Van der Meer magnetic horn. In 1983 Fermilab provided us with lithium lenses to replace the horn with a view to increasing the antiproton yield by about 30%. These lenses needed a much shorter target made of heavy metal - iridium was chosen for this purpose. The 50 mm iridium rod was housed in an extension to the original finned target container so that it could be brought very close to the entrance to the lithium lens. Picture 1 shows this target assembly and Picture 2 shows it mounted together with the lithium lens. These target containers had a short lifetime due to a combination of beam heating and radiation damage. This led to the design of the water-cooled target in a titanium alloy body <A href="http://weblib.cern.ch/format/showfull?uid=519512&base=OBJOBJ&sysnb=0000166"> (see object AC-020).</A>

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These documents represent the filing system of Christopher Llewellyn Smith during his period as Director-General of CERN. They cover all aspects of CERN's activities, and include: relations with the Delegations relations with Administrative Sector, Accelerator and Technology Sector, and Computing and Research Sector minutes of Directorate, Management Board meetings, etc... minutes of scientific committees and other committees meetings conferences correspondence documents concerning official visits personnel matters concerning appeals, early retirements, policy, recruitment... * DG working files

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