CLIC

The Compact Linear Collider (CLIC) study is an international collaboration working on a concept for a machine to collide electrons and positrons (antielectrons) head-on at energies up to several Teraelectronvolts (TeV). This energy range is similar to the LHC’s, but using electrons and their antiparticles rather than protons, physicists will gain a different perspective on the underlying physics.

CLIC conceptual drawing

CLIC conceptual drawing

The aim is to use radiofrequency (RF) structures and a two-beam concept to produce accelerating fields as high as 100 MV per meter to reach a nominal total energy of 3 TeV, keeping the size and cost of the project within reach.

The two-beam acceleration scheme envisioned in CLIC was extensively studied in the Two-beam Test-stand (TBTS), part of the CLIC Test Facility CTF3 at CERN. A high frequency electron beam (the drive beam) is sent to a Power Extraction Structure (PETS). The PETS transfers the extracted beam energy into an RF structure where it is used to accelerate the so called probe beam. Beam stability, beam loss issues as well as PETS and RF structures will be studied in this set-up.

Two-beam test-stand

RF Breakdown studies for CLIC

After the successful start of the LHC accelerator at CERN, we expect many years of discoveries that could lead to better understanding of the universe. Accelerator physicists however continue to plan for future facilities where more detailed studies of particle physics secrets can be done at higher energies. CLIC, the Compact Linear Collider, is the proposed successor to the LHC. In the CLIC particles are accelerated by a very strong electric field. Unfortunately, large electric fields can lead to vacuum discharges which in turn can affect the particle beam and lead to reduced performance of the CLIC accelerator. Studies of the physics behind vacuum discharges and its effect on the beam is therefore an important issue we are investigating in Uppsala.

 

DC cryogenic system
Electrodes

Further information

The official CLIC webpage

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