1. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 Prototype Test of Type-B 1 Takanori Sekiguchi KAGRA F2F MEETING Feb. 2015

2. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 Overview of SAS prototype test Payload prototype test Status & plan of full type-B test Contents 2

3. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 Prototype Test Status 3 AssemblyPerformance Pre-isolator GAS filter Payload Full SystemUndergoing TBD Pre-isolator GAS filter Payload

4. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 4 Payload Prototype Test

5. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 Payload Prototype Test in NAOJ 5 Purpose: Check the assemblability and feasibility Test the local control using OSEMs

6. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 Structure of payload 6 Bottom Filter Intermediate Mass/ Intermediate Recoil Mass Intermediate Mass/ Intermediate Recoil Mass Mirror / Recoil Mass

7. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 (Rough) Assembly Procedure 7 Suspend mirror & RM

8. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 8 (Dummy) mirror suspended by φ0.2 steel wires Recoil mass suspended by φ0.6 tungsten wires Winches to suspend masses Height measure to check the wire length

9. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 (Rough) Assembly Procedure 9 Suspend IM from BF

10. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 10 Tuning masses (weight control & balancing)

11. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 11 Screw to change the suspension point Tuning pitch frequency ~0.2 Hz

12. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 (Rough) Assembly Procedure 12 Suspend IRM

13. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 13 IRM (without OSEMs) Suspended by 3 wires Screws for changing suspension points

14. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 14 Cable clip Cabling of electrical wires

15. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 Compensation masses to get enough weight for GAS filter Feedback to the design 15 Separate OSEM parts for easier assembly … and so on.

16. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 16 Control Test

17. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 OSEM 17 Unit of a shadow sensor and a coil-magnet actuator (Current Design) LED PD flag coil magnet lens

18. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 OSEM 18 Calibration results of shadow sensors of 4 prototype units Sensitivity: ~6.5 V/mm

19. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 OSEM 19 Shadow sensor noise ~ 5e-10 m/√Hz @ 10 Hz

20. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 OSEM 20 Actuation force by an OSEM actuator ~1.7 [N/A]

21. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 Actuator Diagonalization (Mirror) 21 X Y Z 3 DoFs we want to sense with 4 sensors: 4 actuators we use to actuate 3 DoFs: The actuation matrix D is improved by measurement. 1 st guess (Actuator Diagonalization) 1 2 3 4

22. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 Actuator Diagonalization (IM) 22 Z 6 DoFs we want to sense with 6 sensors: 1 st guess X Y 5 6 7 8 910 6 actuators we use to actuate 6 DoFs:

23. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 Implementation in Digital System 23 MEDM Screen for type-B SAS control (under development) Sensor MatrixActuator Matrix Signal Flow Signals from shadow sensors Actuation Signals

24. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 Transfer functions (Mirror) 24 Pitch Yaw Length White noise is injected to virtual actuators

25. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 Transfer functions (IM) 25

26. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 Damping Control 26 Damping servo is applied to the 6-DoF motion of IM and 3- DoF motion of the mirror Derivative filter (viscous damping)

27. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 In-loop performance 27 OSEM signal of IM longitudinal motion OSEM signal of IM yaw motion 3 μm  0.6 μm 30 μrad  2 μrad

28. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 Optical Lever 28 Optical levers to monitor mirror angles / displacement 1W SLD Half Mirror QPD2 QPD1 Collimator

29. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 Out of loop performance 29 Optical lever signals about mirror pitch motion Optical lever signals about mirror yaw motion 35 μrad  13 μrad 50 μrad  12 μrad

30. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 30 Full Type-B Test

31. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 Full Type-B Test 31 @TAMA West-End Room Full type-B prototype will be assembled and tested in vacuum Overall performance is to be checked by using optical lever

32. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 Current Status 32 Vacuum system preparation Height of the chamber is to be checked

33. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 Current Status 33 Cleaning and remanufacturing of IP base Finished on Jan. 28

34. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 Current Status 34 Vacuum pod for geophone (seismometer) manufactured Assembling and cabling should be done

35. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 Current Status 35 An assembly frame is designed.

36. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 Schedule 36 According to KAGRA schedule, prototype test is to be finished until the end of March. Extremely tight!

37. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 Main Tasks 37 Consider assembly procedure. Do mechanical tuning (leveling, weight control, etc.) Make an assembly manual (for installation of actual system) Manufacture in-vacuum electrical cables Design servo filter in mathematical model Prepare digital system interface Red: Important for KAGRA Violet: Time-consuming tasks

38. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 We need your help!! 38 We call for KAGRA-shift This prototype test is an absolutely important step in considering installation procedure of actual system, and getting more realistic plan/schedule of VIS installation

39. iKAGRA schedule20142015 101112123456789101112 Fabry-Perot-Michelson VIS installation Stack install Stack MC suspension install MC PR2 & PR3 frame/payload procurement PR2 & PR3 IXA & EXA (Xarm cavity) frame/payload procurement IXA & EXA IYA & EYA (Yarm cavity) frame/payload procurement IYA & EYA BS modifying prototype payload procurement BS Xarm commissioning Full commissioning Observation Obs. Michelson VIS installation Stack install Stack MC suspension install MC PR2 & PR3 frame/payload procurement PR2 & PR3 IXA & IYA EXA & EYA frame/payload procurement EXA & EYA BS modifying prototype payload procurement BS Michelson commissioning Observation Obs. Schedule of VIS installation: iKAGRA Dec 2015 operation 39

40. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 40 END

41. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 41 Appendix

42. Takanori Sekiguchi ALPS Report, Dec. 26th, 2013 Close Loop TF 42