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Stabilization status and plans

K. Artoos, C. Collette, R. Leuxe, C.Eymin , P. Fernandez , S. Janssens *. Stabilization status and plans. The research leading to these results has received funding from the European Commission under the FP7 Research Infrastructures project EuCARD. Outline. Requirements Review status 2012

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Stabilization status and plans

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  1. K. Artoos, C. Collette, R. Leuxe, C.Eymin, P. Fernandez, S. Janssens* Stabilization status and plans The research leading to these results has received funding from the European Commission under the FP7 Research Infrastructures project EuCARD

  2. Outline • Requirements • Review status 2012 • Plans for 2013, objectives • Manpower & collaboration status

  3. Requirements • Ground motion • External forces • Flexibility of magnet 3992 CLIC Main Beam Quadrupoles: A. Samoshkin Stability (magnetic axis): Nano-positioning Type 4: 2m, 400 kg Type 1: 0.5 m, 100 kg

  4. Other requirements • Stiffness-Robustness • Applied forces (water cooling, vacuum, power leads, cabling, interconnects, ventilation, acoustic pressure) • Compatibility alignment • Transportability/Installation • Available space • Integration in two beam module • 620 mm beam height • Accelerator environment • -High radiation • Stray magnetic field • Positioning • -Steps of tens of nm +/- 1 nm

  5. Review status 2012 • MBQ Stabilisation Main linac Req.: 1.5 nm r.m.s. Collocated pair Type 1 Seismometer FB max. gain +FF (FBFFV1mod): 7 % luminosity loss (no stabilisation 68 % loss) Courtesy J. Snuverink, J. Pfingstner et al. X-y proto

  6. Inertial Reference mass Stef Janssens Courtesy J. Snuverink et al. “Comparison of new absolute displacement sensors”, C. Collette et al. , ISMA 2012 C. Collette

  7. X-y prototype: Nano positioningResolution, precision, accuracy Capacitive sensor 3 beaminterferometer Actuators equipped with strain gauges Optical ruler

  8. X-y positioning: Studyprecision, accuracy and resolution • The precisionrequired (0.25 nm): • demonstratedwithopticalrulers • in a temperature stable environment • for simultaneous x and y motion. • Absoluteaccuracy: • calibratedwithin 10-8 m • Tests in a temperatureunstableenvironmentwillbe made(ISR re installation)

  9. X-y Positioning: roll • 2 legs 3 d.o.f. > parasitic roll • Measured with 3-beam interferometer • ~3 μm lateral movement > ~7 μrad rotation • Early simulations suggest~100 μrad/0.5% luminosity loss (J. Pfingstner) 1&2 Parasitic roll

  10. 2013 Build three “best available design” MBQ modules Type 1 ISR Type 1 CLEX Functional performance testing + development time: Study and try assembly Requires controlled stable environment (Temperature, Vibrations, Access) Demonstration feasibility + ultimate performance Water cooling + powering magnet Test module location not adapted for this. Magneticmeasurements and fiducialisation Type 1 Test module withdummymagnet Integration in test module, connections to other modules, robust show case, transport, … Demonstration alignment and stabilization but not representative for CLIC tunnel Type 4 ISR Type 4 Test module MBQ modules upgradable (bolted together, no welds). K.Artoos, Stabilisation WG , 21th February 2013

  11. Type 1 and Type 4 mechanical design FE simulations are done expected (good) results Production plans finished end of next week Vertical mode: ~315 Hz Lateral mode: ~139 Hz K. Artoos, R. Leuxe, C. Eymin

  12. Combination of fast positioning and stabilization • Combining positioning and stabilization: • Making error to requested position R as small as possible • Additional displacement measurement for low frequency to DC • Sensors separated in bandwidth • integrator at low frequency to eliminate drift • Simulations function > To be implemented on x-y prototype Stef Janssens

  13. Communication with Control Center Labview communication program between magnet and simulated control room Signals out: New position Gain FF/FB Filter positions Signals in: Transfer function (every 5 s) Rel./abs. Position Error signals Signals out: Geophone/position signals SDI signal for DIG_POTS Signals in: CS signals for DIG_POTS CLK signals for DIG_POTS New position X/Y

  14. Preparation test modules and CLEX:Two type 1 MBQ and one Type4 • Flexural joints machined. Actuators with amplifiers and sensors delivered January 2013. • Electronic boards under construction, • Design Type 1 and type 4 mechanical support ongoing (80% ready) • Demonstrators T1 and T4 planned for April 2013. • Issue: Reduction manpower stabilisation MME in 2013 EUCARD deliverable

  15. Manpower + collaborationstatus • CERN Networking with NIKHEF (PhD Stef, TNO, MI Partners, TU Delft,…) • Synergy sensor development with LIGO, VIRGO. Contact Christophe Colette Action CLIC : new collaboration agreements + K contracts

  16. Objectives 2013 at CERN • Build and test 3 MBQ modules with controller hardware • Type 1 ISR + CLEX (precursor PACMAN) • Type 4 ISR + Test module • Type 1 Test module • X-Y guide: • Continue tests stopped in 2012 • Test absolute sensors • Develop and test positioning controller • Test inertial sensors prototypes + stabilisation controller • Vibration measurements module + pulsed dipole correctors • Outsource: • Construction of adapted sensors • (transfer function, AE compatible, noise level) • Collocated sensor-actuators • If time permits: Ground motion measurements around CMS

  17. SPARES S. Janssens, CLIC Workshop, January 2013

  18. Controller Electronics Hybrid Second generation P. Fernandez Carmona • 2 d.o.f. • Position input terminal • Switchable (displacement/velocity) • Manual or Digital gain/filter control • FPGA control digital part started • Improved radiation hardness (choice components • Tested for SEU and induced noise at H4HIRRAD H4IRAD test stand No damage nor SEU after 18 Gy Test not complete Report to be finalized Piezo amplifier not radhard

  19. Objectives 2013 • CERN “team”: Build and test 3 MBQ modules • Type 1 ISR + CLEX (precursor PACMAN) • Type 4 ISR + Test module • Type 1 Test module • Outsource: • Construction of adapted sensors • (transfer function, AE compatible, noise level) (in progress) • High stiffness actuators (done) • Collocated sensor-actuators • Characterization existing systems • ? Study pre-isolator Final Focus (Model (almost) done=>Test beam simulations) • High load high range high resolution actuators • Construction electronics (in progress (soldering components)) • Implementation of custom digital slow control (in progress) • Construction mechanics: flexural joints, monolithic , machining, assembly,… • Displacement sensors and their implementation (in progress) • Development Radiation hard components

  20. Stabilization with Interferometer based geophone Interferometer based geophone built and tested: -Very high sensitivity, high resolution -Wider bandwidth -Proof of concept Measured open loop on x-y guide Stef Janssens Issue: Due to higher bandwidth, actuator slew rate gives instabilities in the loop -> New batch of actuator amplifiers have a higher slew rate

  21. Comparisonsensors S. Janssens, CLIC Workshop, January 2013

  22. Five R&D themes : S. Janssens, CLIC Workshop, January 2013

  23. Extra slide: Measured slew rate of actuator S. Janssens, CLIC Workshop, January 2013

  24. Bill of Materials • Amplifiers • LMP2022MA: Zero Drift, Low Noise, EMI Hardened Amplifier • AD8230YRZ:  Zero-Drift, Precision Instrumentation Amplifier • AD8691AUJZ: Low Cost, Low Noise, CMOS Rail-to-Rail Output Operational Amplifier • Power regulator ICs: TPS76550, REG1117-2.5, TPS72325, UCC284-5 • FLASH Digital potentiometers: AD5231, AD5204 • Diodes: BAV199 • Capacitors: Tantalum • Resistors: Thin film 1% • Potentiometers: Cermet • Digital slow control • National Instruments PXI with DAQmx card • FPGA: Spartan 6 evaluation board (under development) S. Janssens, CLIC Workshop, January 2013

  25. Controller electronics: Hybrid Local electronics ADCs digitize signals For remote monitoring Communication to remote control center with optical fiber 2 analogue chains + positioning offset SPI P. Fernandez Carmona (until end of August) S. Janssens, CLIC Workshop, January 2013

  26. Inertial reference mass proto (v3): With interferometer/withcapacitive gauge S. Janssens, CLIC Workshop, January 2013

  27. Active Stabilization Typical quadrupole jitter tolerance O(1nm) in main linac and O(0.1nm) in final doublet Final Focus QD0 Prototype Luminosity achieved/lost [%] Code Close to/better than target Machine model Beam-based feedback

  28. 3D simulated Kinematics • No loss of translation range for T4 • About 25% of loss of vertical translation range for T1 pitch • About 80% of loss of lateral translation range for T1 yaw M. Esposito, IWAA 2012 Fermilab

  29. Roll simulations

  30. The influence of the orbit feedback is in general small. For the main linac the tolerance for 0.5% lumi loss is about 100urad (already provided by Daniel before). Including also the BDS without the final doublet, since not actuated by the tripot, (dashed pink curve), the tolerance is about 1um. S. Janssens, CLIC Workshop, January 2013

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