Identity area
Reference code
Title
Date(s)
- 1974 (Creation)
Level of description
Extent and medium
Object
Context area
Repository
Archival history
Immediate source of acquisition or transfer
Content and structure area
Scope and content
This magnetic focusing horn was used for the AA (antiproton accumulator). Its development was an important step towards using CERN's Super Proton Synchrotron as a proton - antiproton collider. This eventually led to the discovery of the W and Z particles in 1983. Making an antiproton beam took a lot of time and effort. Firstly, protons were accelerated to an energy of 26 GeV in the PS and ejected onto a metal target. From the spray of emerging particles, a magnetic horn picked out 3.6 GeV antiprotons for injection into the AA through a wide-aperture focusing quadrupole magnet. For a million protons hitting the target, just one antiproton was captured, 'cooled' and accumulated. It took 3 days to make a beam of 3 x 10^11 -, three hundred thousand million - antiprotons.
Appraisal, destruction and scheduling
Accruals
System of arrangement
Conditions of access and use area
Conditions governing access
Public
Conditions governing reproduction
Language of material
Script of material
Language and script notes
Physical characteristics and technical requirements
15 000 CHF
Finding aids
Allied materials area
Existence and location of originals
Available, 282.
Existence and location of copies
Related units of description
Notes area
Note
Focusing horn and antiproton target fixed onto the same holder.
