BLM crosstalk studies on the CLIC two-beam module

The Compact Linear Collider (CLIC) is a proposal for a future linear e⁺- e⁻ collider that can reach 3 TeV center of mass energy. It is based on a two-beam acceleration scheme, with two accelerators operating in parallel. One of the main elements of CLIC is a 2m long two-beam module where power from a high intensity, low energy drive beam is extracted through Power Extraction and Transfer Structures (PETS) and transferred as RF power for the acceleration of the low intensity, high energy main beam. One of the potential limitations for a Beam Loss Monitoring (BLM) system in a two-beam accelerator is so-called "crosstalk", i.e signals generated by losses in one beam, but detected by a monitor protecting the other beam. This contribution presents results from comprehensive studies into crosstalk that have been performed on a two-beam module in the CLIC Test Facility (CTF3) at CERN. (author)