CTF3 (CERN)

The CLIC Test Facility 3 (CTF3) at CERN aims to demonstrate the feasibility of the Compact Linear Collider.

It primarily consist in a scaled version of the CLIC drive beam: a 4 A, 1.5 GHz, ~120 MeV, 1.2 μs beam is a generated in a fully loaded linac. The so-called delay loop and combiner ring are then used to compress the beam pulse into a 140 ns, 28 A, 12 GHz pulse.

In parallel a 200 MeV probe-beam is generated by the so-called CALIFES injector.

The two beams are then used to demonstrate the two-beam acceleration in the Two-Beam-Module installed into the CLEX area: the drive beam is decelerated in special Power Extraction and Transfer Structures (PETS), and the power produced used to accelerate the probe-beam with a gradient up to 145 MeV/m.