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CLIC Stabilization (Linac and FF)

CLIC Stabilization (Linac and FF). Input for a list of actions A basis for this afternoon discussions !. Tasks (Draft) (see also next talk: FP7 WP3 Task2). Demonstrate 1nm quadrupoles stability above 1Hz (Linac) Demonstrate 0.1nm stability above 5Hz (Final Focus)

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CLIC Stabilization (Linac and FF)

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  1. CLIC Stabilization (Linac and FF) Input for a list of actions A basis for this afternoon discussions ! C. Hauviller

  2. Tasks (Draft)(see also next talk: FP7 WP3 Task2) • Demonstrate 1nm quadrupoles stability above 1Hz (Linac) • Demonstrate 0.1nm stability above 5Hz (Final Focus) • Differences compared to previous studies • 0.1 nm is beyond what we have shown • apply stabilization in an accelerator environment • achieve 1nm with realistic equipment (a complete system), not simple elements on a special table • verify performance with (two) different methods • Characterize vibrations/noise sources in an accelerator • Compatibility with alignment • Sensitivity to relaxed specifications C. Hauviller

  3. Actions list (1)Apply to quadrupole stabilization (series production) and to final focus (technological limit). • Characterize vibrations/noise sources in an accelerator (CERN, DESY,…) • Overall design • Compatibility of linac supporting system with stabilization (including mechanical design): eigenfrequencies, coupling between girders, coupling of mechanical feedback with beam dynamics feedback,… (CERN, LAPP, DESY,…) • Integration of all the final focus features: types of supporting structures, coupling with vertex detector, forward detectors,… (LAPP, CERN,…) C. Hauviller

  4. Actions list (2) • Sensors • Develop and test sensors (Industry, ULB, INSALyon, CERN, LAPP) • Calibrate by comparison. Use of interferometer (OXFORD). Use of other techniques. Create a reference test set-up (at CERN?). • Actuators • Understand the behavior of the CERN table. Acquire a second one with dimensions better adapted to the final focus. • Develop and test various damping techniques (passive and active) (LAPP, CERN,…) • Feedback • Develop methodology to tackle with multi degrees of freedom (large frequency range, multi-elements) (CERN,…) • Apply software to various combinations of sensors/actuators and improve resolution (noise level) (LaVista, CERN, …) C. Hauviller

  5. Actions list (3) • Overall system analysis • Stability, bandwidth,… (CERN, LaVista) • Faults analysis and tolerance (CERN, LaVista) • Sensitivity to relaxed specifications (e.g. factor 2 or 5) • Integrate and apply to linac (e.g. CLEX) and final focus prototypes (e.g. ATF2) (LAPP, OXFORD, CERN, PSI, DESY,…) C. Hauviller

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