CTF3

LPI was primarily used to inject electrons and positrons into the CERN accelerator complex, to be ultimately delivered to Large Electron–Positron Collider (LEP).

This page provides a general description of the facility with references to its main experimental program.

[1] The facility implemented and demonstrated the feasibility of a scaled version of the CLIC Drive Beam: a 1.2 μs-long electron beam (bunched at 1.5 GHz, and with 4 A mean current) was generated and accelerated up to ~135 MeV in a ~80 m-long LINAC by using fully loaded accelerating structures powered by ~40 MW, 3 GHz RF pulses.

[8] The facility served as test bed for other CLIC related R&D, for example: In December 2016, while CTF3 was ending its operation, it was decided to transform the Probe Beam in a new general purpose R&D facility under the name of CERN Linear Electron Accelerator for Research, or CLEAR.

Thanks to its ease of operation and versatility, the Probe Beam was used also for activities not directly connected to CLIC.

CTF3 layout
Layout of the CLIC Test Facility at CERN (CTF3) showing its main parts. The beam path is identified by solid red lines. Accelerating structures, both longitudinal and transverse, are identified by green blocks on the beam path, while blue blocks represent Power Extraction and Transport Structures (PETS).
View of the CERN Linear Electron Accelerator for Research (CLEAR) beamline seen from the end of the line beam dump .