Julien Branlard (DESY)
Due to its scale and tight specifications, the European XFEL poses real challenges in the field of low-level radio-frequency (LLRF) control. The implementation of this semi-distributed control system on the microTCA for physics (MTCA.4) platform triggered numerous designs of electronic boards and helped refine the usage of MTCA.4 technology for physics and control systems. This contribution...
Dr Yuji Otake (XFEL Research and Development Division, RIKEN SPring-8 Center, RIKEN)
The X-ray free-electron laser, SACLA, at SPring-8 emits a steady laser with an intensity of 300 uJ at 10 keV, which strongly supported by a highly accurate and stable LLRF system. This LLRF system realizes about a 20 fs short-term temporal stability. However, SACLA still requires operator trimming once a 30 minutes to the rf phase and amplitude of injector cavities. Hence the long-term...
Dr Daniel Valuch (CERN)
The HIE-ISOLDE project is a major upgrade of the ISOLDE and REX-ISOLDE (radioactive nuclear beams) facilities at CERN. The most significant improvement will come from replacing most of the existing REX accelerating structure by a 40 MV superconducting linac based on 32 independently phased superconducting quarter-wave resonators (cavities). The new linac will raise the energy of...
Dr Philippe Baudrenghien (CERN)
In collision, the LHC has so far been operated at 4 TeV/c per beam with up to 0.4 A DC current (per beam) distributed in 1320 bunches at 50 ns spacing. The future is 7 TeV/c, up to 1.1 A DC current and 25 ns spacing (HiLumi LHC). The roadmap to HiLumi LHC includes the installation of Crab Cavities operated at the fundamental accelerating frequency (400.8 MHz), with six cavities per beam at...