AA, view into the tank for the stochastic precooling kicker

The kicker for the fast stochastic cooling of the freshly injected antiprotons was installed in this tank. A shutter shielded the deeply cooled antiproton stack from the violent action of the precooling kicker. The injection orbit is to the left, the stack orbit far to the right. After several seconds of precooling (in momentum and in the vertical plane), the shutter was opened briefly, so that by means of RF the precooled antiprotons could be transferred to the stack tail, where they were subjected to further cooling in momentum and both transverse planes. The fast shutter, which had to open and close in a fraction of a second, was an essential item of the cooling scheme and a mechanical masterpiece. See also 7910267, 8002234.