"Flat-Fish" vacuum chamber for the ISR

The "Flat-Fish" vacuum chamber was a very special one for the ISR beam intersection I4, inside the Split-Field Magnet. Technical descriptions are given with pictures <a href="https://cds.cern.ch/record/969139">7802042</a> and <a href="https://cds.cern.ch/record/917322">7712182</a>. There were several generations of this chamber. This picture was taken during the last year of ISR operation. See also <a href="https://cds.cern.ch/record/917238">7510230X</a>, <a href="https://cds.cern.ch/record/917479">7511123X</a>, <a href="https://cds.cern.ch/record/969137">7802039</a> and <a href="https://cds.cern.ch/record/969138">7802041</a>. A flat-fish type vacuum chamber was also used at I8, inside the Open Axial Field Magnet (OAFM, experiment 807 on large transverse momentum collision products), see <a href="https://cds.cern.ch/record/969287">7901358</a>.