The RF (Radio Frequency) system on ALICE (Accelerators and Lasers in Combined Experiments) is designed to provide the required accelerating gradient for two Superconducting Radio Frequency (SRF) cryomodules, and for a normal conducting buncher cavity. Each SRF cryomdule has 2 identical cavities operating at 1.3 GHz and are powered by 5 Inductive Output Tubes (IOTs). Booster cavity 1 is powered by 2 e2v IOT116LS IOTs, booster cavity 2 has a CPI CHK51320W IOT, linac cavity 1 has an e2v IOT and linac cavity 2 has a Thales TH713 IOT. The RF power to the buncher cavity is provided by a single 2.5 kW solid state amplifier provided by microwave amplifiers.

Additionally the RF system incorporates an analogue Low Level RF (LLRF) system which is designed to set the phase and amplitude of the RF in the normal-conducting Buncher cavity and the super-conducting booster and linac cavities, to required levels and also to maintain the phase and amplitude at these levels in the presence of external noise sources. These can be phase changes due to cavity detuning, reduction in gradient due to accelerating beam, cryomodule microphonics etc.