RF systems are essential along the modern linear accelerators.
ESS will be the world’s most powerful pulsed neutron source based on a linear pulse accelerator (Linac) which accelerates a proton beam of 62.5 mA current to an energy peak of 2000 MeV.
The ESS linac includes a normal conducting or warm linac section composed of an RFQ (Radio Frequency Quadrupole), a MEBT (medium Energy Beam Transport) with three bunchers cavity type, and 5 DTL (Drift Tube Linac) tanks. Then, the superconducting section start with the spokes cavities to continue with medium and high beta cavities.
The normal conducting linac will be powered by nine power sources (one for the RFQ, three for the bunching cavities in the medium energy beam transport and five power sources for the five drift tube tanks) operate at 352.21 MHz and have to provide the RF power required for a proton beam of 62.5 mA of peak current for over a beam pulse length of 2.86 msec, at a pulse repetition rate of 14 Hz.
The RF system can be defined as all the components and subsystems needed to generate and deliver RF power to the cavities between the wall power plug and the cavity coupler. The complete chain includes modulators, amplifiers, RF distribution system, low Level RF system, local interlock and control system.
Engineering & Technology
How to arrive
- Simulation and Modelling
- Experimental Characterization
- Control design