Speaker
Description
The injector 2 cyclotron is the second accelerator stage of the high intensity proton accelerator (HIPA) at PSI. In this cyclotron protons are accelerated from 870keV to 72MeV. The beam current is up to 2.4mA DC. The injector 2 is built as a separated sector cyclotron with 4 sector magnets and 4 sections for cavities. The main acceleration is done by two 50MHz cavities. From the initial design two cavities on the 3rd harmonic frequency for flat-toping are installed. Now day those flattop cavities are used as additional accelerating cavities.
Several years ago an upgrade program started to replace the 150MHz cavities by 50MHz for a higher energy gain per turn. This will lead to lower extraction losses and some freedom for higher beam currents. On the other hand the 40 years old LLRF and amplifier systems will be replaced by this upgrade.
During the shutdown this year the first new cavity was installed as vacuum chamber. Until the next shutdown in 2019 the new LLRF and amplifier system will be built and commissioned, to operate the new cavity. This talk will give an overview of the ongoing project with a closer look at the cavity test results.