Turkish Accelerator Center Proton Accelerator Facility (TAC – PAF) is planned to supply a proton beam with the beam power of 1 MW at a final energy of 2 GeV. TAC PAF will be a multi-disciplinary research centre, and could serve as a neutron spallation source, a radioactive ion beam facility, a prototype facility to conduct research into accelerator-driven sub-critical reactors, as well as a number of lower energy facilities for use in medicine and other sciences.
The proposed proton accelerator facility may consist of normal and super conducting linear accelerator parts.


Linear proton accelerator with low energy planned as pre-accelerator will comprise a H+ ion source with the energy of 45 keV and a peak current of 30 to 40 mA, low energy beam transport line (LEBT), 3 MeV energy radio-frequency quadrupole linac (RFQ). The RFQ accelerator is followed by a medium energy beam transport (MEBT) line and some diagnostic elements. The beam of 3 MeV will be accelerated by two drift- tubes (DTL) to 65-MeV energy. Acceleration from 65 MeV up to 150 MeV energy is provided by a SC-spoke cavity followed by two SC-elliptical cavities which aim to provide acceleration up to 250 MeV and  then to 2 GeV.
The project will progress in three stages:

  • Stage 1: a 3 MeV ion-source, Low Energy Beam Transport (LEBT) and a Radio-Frequency Quadrupole (RFQ)
  • Stage 2: a 250 MeV linear accelerator, which could be built in two phases – phase 1 is a 3-65 MeV Drift Tube Linac (DTL) and phase 2 is a MEBT and 65-250 MeV SC-spoke cavity and SC-elliptical cavity
  • Stage 3: a 1 MW proton facility at 2 GeV – a SC-elliptical cavity



Ion source parameters:

Ion Source H+
Current (mA) 30-50
Output energy (keV) 45-65
Repetation rate (Hz) 25-50
Beam pulse length (ms) 1-2