New generation of very low noise beam position measurement system for the LHC transverse feedback

Abstract Recent studies showed that the transverse feedback system noise floor in Large Hadron Collider (LHC) must be reduced by at least factor of two order to operate machine with large beam-beam tune shift as foreseen High Luminosity (HL) LHC. Also, future suppress LHC Crab Cavity relies on improved performance beam position measurement system. An upgrade program was launched lower during Long Shutdown II. A new generation, very low module developed and tested beam. Innovative methods RF receiver, digital signal processing, thorough optimization every element chain from pickup kickers allowed achieve a significant reduction floor. This unprecedented opens also possibilities for auxiliary instruments, using data feedback. The paper presents system, notable implementation details measured performance.