STABILISATION WP STATUS CTC DECEMBER 2012 The research leading to these results has received funding from the European Commission under the FP7 Research Infrastructures project EuCARD

Outline K.Artoos, CTC December  Manpower & collaboration status  Review status 2012  MBQ stabilisation and Nano-positioning status  Final focus status  Other  Plans for 2013, objectives

Manpower + collaboration status 3 K.Artoos, CTC December 2012 CERNS.Janssens (PhD > Fellow) 100% K.Artoos (100% > 50%) M. Esposito (50%, 12/2012) P. Fernandez Carmona (August 12) Designers: R. Leuxe, C. Eymin (jobs) MBQ stabilisation + nano-pos. Sensor development LAPP/ Symme A.Jeremie, G.Deleglise 30% L.Brunetti, J.Allibe (=> July 2013) G.Balik (=> Sept. 2014), J.P. Baud 50% SYMME: B.Caron Final focus stabilisation Sensor development ASL (ULB)Chr. Collette + Master students “Brains back to Brussels” Grant until end 2013 (might be extended) Controller design MBQ & Final Focus Sensor R&D Networking CEA/IRFUF. Ardellier Desages, M. Fontaine, N. Pedrol Margaley (K contract finished) Optical measurement methods Calibration absolute reference To be streamlined at CLIC workshop

 LAPP/Symme Budget:  EuCARD will end soon and not in EuCARD2, ANR on ATF2 just ended, CERN White-Paper finished so no more outside resources available; IN2P3 Budget will probably be reduced again after 30% cut last year; Marie-Curie PACMAN, only a few months of a PhD (if it passes)  LAPP/Symme Space:  will move soon in Maison de la Mecatronique => about the same space available as now, but nearer to SYMME 4 Manpower + collaboration status (2)  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

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

Inertial Reference mass 6 No stabilization68% luminosity loss Inertial ref. mass 1Hz (V3mod)11% Inertial ref. mass 1Hz + HP filter (V3)3% Inertial ref. mass 7 Hz (V3 mod 1)Orbit fb optimised V3: 0.7% K.Artoos, CTC December 2012 Courtesy J. Snuverink et al. Stef Janssens C. Collette “Comparison of new absolute displacement sensors”, C. Collette et al., ISMA 2012

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

X-y prototype Nano positioning Resolution, precision, accuracy 8 Capacitive sensor 3 beam interferometer Optical ruler Actuators equipped with strain gauges

Comparison sensors 9 M. Esposito, IWAA 2012 Fermilab SensorResolutionMain +Main - Actuator sensor0.15 nmNo separate assemblyResolution No direct measurement of magnet movement Capacitive gauge0.10 nmGauge radiation hardMounting tolerances Gain change w.  Orthogonal coupling Interferometer10 pmAccuracy at freq.> 10 HzCost Mounting tolerance Sensitive to air flow Orthogonal coupling Optical ruler0.5*-1 nmCost 1% orthogonal coupling Mounting tolerance Small temperature drift Possible absolute sensor Rad hardness sensor head not known Limited velocity displacements Seismometer (after integration)< pm at higher frequenciesFor cross calibration

X-y positioning: Study precision, accuracy and resolution 10 The precision required by beam dynamics for nano positioning (0.25 nm) was demonstrated with optical rulers in a temperature stable environment and for simultaneous x and y motion. Absolute accuracy can be calibrated within m. Tests in a temperature unstable environment will be made (ISR re installation)

11 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 -integrator at low frequency to eliminate drift -Simulations function -> To be implemented on x-y prototype Stef Janssens

Controller Electronics 12 Hybrid Second generation  2 d.o.f.  Position input terminal  Switchable (displacement/velocity)  Manual or Digital gain/filter control  Improved radiation hardness (choice components  Tested for SEU and induced noise at H4HIRRAD  FPGA control digital part started P. Fernandez Carmona H4IRAD test stand No damage nor SEU after 18 Gy Test not complete Report to be finalized Piezo amplifier not radhard

Preparation test modules and CLEX: Two type 1 MBQ and one Type4 13 Flexural joints machined. Actuators with amplifiers and sensors to be delivered January Electronic boards in construction, 80% of components received Second generation electronics built (more radhard) tested at H4IRRAD Design Type 1 and type 4 mechanical support ongoing (70% ready) Demonstrators T1 and T4 planned for April Issue: Reduction manpower stabilisation MME in 2013 EUCARD deliverable

Analytical & FE results 14 M. Esposito, IWAA 2012 Fermilab Hz k h [N/ μm] Vt k v [N/ μm] 4-bar mode θ mode Vertical mode f [Hz]shapef [Hz]shapef [Hz]shape Without xy guide Analytical Ansys classic Ansys WB With xy guide Analytical Ansys classic Ansys WB Type 1 MBQ with xy guide k h =69 [N/ μ m] k v =227 [N/ μ m] 119 [Hz] 303 [Hz] 319 [Hz] Longitudinal stiffness Without xy guide 0.03 N/ μm With xy guide (pins totally fixed on 1 end) 278N/ μm With xy guide (pins fixed to steel plates) 48 N/ μm Longitudinal mode Without xy guide 3.4 Hz With xy guide (pins totally fixed on 1 end) 280 Hz With xy guide (pins fixed to steel plates) 65 Hz “Development of advanced mechanical systems for stabilization and nano-positioning of clic main beam quadrupoles”, IWAA2012

Andrea JEREMIE CTC 12/12/12 15 RMS ground at 4 Hz: 5 nm RMS on foot at 4Hz: 0,6nm RMS ratio: 8,3 Attenuation up to 50dB between 1,5-100Hz 1,5Hz-100Hz 0,6 nm 5 nm For all tests done, limited by sensor noise Final Focus stabilisation

16 Final Focus Stabilisation K.Artoos, CTC December 2012  [C. Collette et al. “Control strategies for the final focus of future linear particle collider” Nuclear Instruments and Methods in Physics Research, Section A Vol. 684 (August 2012), pp. 7-17]  Test set-up with carbon cables and IFF C. Collette et al. Presentation MDI this Friday

17 CMS synchronous Final focus ground motion measurements Other subjects: M. Guinchard Equipment available and validated Organise access, availability people ATF2 Ground motion measurements Cabling sensors done Noise tests long cables done DAQ programming done Electronics powering done All sent to LAPP Preparation displacement measurements 0.2 µm 12 mm K.Artoos, CTC December 2012

18 K.Artoos, CTC December 2012 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) High stiffness actuators (done) * Collocated sensor-actuators Characterization existing systems ? Study pre-isolator Final Focus High load high range high resolution actuators * Construction electronics Implementation of custom digital slow control Construction mechanics: flexural joints, monolithic, machining, assembly,… Displacement sensors and their implementation Development Radiation hard components

19 K.Artoos, CTC December 2012 Budget 2013 Purchase 12 piezo actuators with amplifiers 68 kCHF (Delivery 15 th January) Usinage + achat Type 1 TM, Type 1 ISR, Type 4 ~80000 CHF Travelling KEK, installation GM measurements, Transport equipment (stay 2 weeks 2-3 people): 30 kCHF Instrumentation optical rulers 20 kCHF Components mounting electronics 20 kCHF Subcontracting : Inertial mass : 150 kCHF ? Study pre-isolator: 100 kCHF Budget estimation to be completed with information from collaborations

SPARES 20 K.Artoos, CTC December 2012

Five R&D themes : 21 K.Artoos, CTC December Performance increase → Reach requirements from higher background vibrations + include direct forces → Increase resolution (Final focus) 2.Compatibility with environment → Radiation, magnetic field, Operation, Temperature 3.Cost optimization → Standardize and optimize components, decrease number of components, simplify mounting procedures,… 4.Overall system analysis → Interaction with the beam-based orbit and IP feedback to optimise luminosity Integration with other CLIC components → Adapt to changing requirements 5.Pre-industrialization → Ability to build for large quantities

22 Extra slide: Measured slew rate of actuator

23 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, REG , 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) P. Fernandez Carmona, RadWG meeting, Geneva, 17 January 2012

24 Controller electronics: Hybrid 2 analogue chains + positioning offset Local electronics ADCs digitize signals For remote monitoring Communication to remote control center with optical fiber K.Artoos, CTC December 2012 SPI P. Fernandez Carmona (until end of August)

X-y Positioning 25 1&2 Parasitic roll M. Esposito, IWAA 2012 Fermilab

26 Inertial reference mass proto (v3): With interferometer/with capacitive gauge K.Artoos, CTC December 2012