Identity area
Reference code
Title
Date(s)
- 1980 (Creation)
Level of description
Extent and medium
Object
Context area
Repository
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Content and structure area
Scope and content
<!--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>
Appraisal, destruction and scheduling
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Public
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Language and script notes
Physical characteristics and technical requirements
32 cm 10 cm
Finding aids
Allied materials area
Existence and location of originals
Available, 33.
Existence and location of copies
Related units of description
Notes area
Note
Targets designed and made by C. Johnson and M. Frauchiger, CERN
