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

Takanori SekiguchiALPS Report, Dec. 26th, 2013 1

Prototype Test of Type-B

Takanori Sekiguchi

KAGRA F2F MEETINGFeb. 2015

Takanori SekiguchiALPS Report, Dec. 26th, 2013 2

• Overview of SAS prototype test• Payload prototype test• Status & plan of full type-B test

Contents

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Prototype Test Status

Assembly Performance

Pre-isolator

GAS filter

Payload

Full System Undergoing TBD

Pre-isolator

GAS filter

Payload

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Payload Prototype Test

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Payload Prototype Test in NAOJPurpose:• Check the assemblability

and feasibility• Test the local control using

OSEMs

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Structure of payload

Bottom Filter

Intermediate Mass/Intermediate Recoil Mass

Mirror / Recoil Mass

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(Rough) Assembly ProcedureSuspend mirror & RM

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(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

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(Rough) Assembly ProcedureSuspend IM from BF

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Tuning masses(weight control & balancing)

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Screw to change the suspension point

Tuning pitch frequency~0.2 Hz

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(Rough) Assembly ProcedureSuspend IRM

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IRM (without OSEMs)Suspended by 3 wires

Screws for changing suspension points

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Cable clip

Cabling of electrical wires

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• Compensation masses to get enough weight for GAS filter

Feedback to the design• Separate OSEM parts for easier

assembly

… and so on.

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Control Test

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OSEMUnit of a shadow sensor and a coil-magnet actuator

(Current Design)

LED

PD

flag

coil

magnetlens

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OSEMCalibration results of shadow sensors of 4 prototype units

Sensitivity: ~6.5 V/mm

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OSEMShadow sensor noise

~ 5e-10 m/√Hz @ 10 Hz

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OSEMActuation force by an OSEM actuator

~1.7 [N/A]

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Actuator Diagonalization (Mirror)

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.

1st guess

(Actuator Diagonalization)

1

2

3

4

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Actuator Diagonalization (IM)

Z

6 DoFs we want to sense with 6 sensors:

1st guess

X

Y

5

6

78

9 10

6 actuators we use to actuate 6 DoFs:

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Implementation in Digital SystemMEDM Screen for type-B SAS control (under development)

Sensor Matrix Actuator Matrix

Signal Flow

Signals from shadow sensors

ActuationSignals

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Transfer functions (Mirror)

Pitch

Yaw

Length

White noise is injected to virtual actuators

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Transfer functions (IM)

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Damping ControlDamping servo is applied to the 6-DoF motion of IM and 3-DoF motion of the mirror

Derivative filter(viscous damping)

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In-loop performanceOSEM signal of IM longitudinal motion

OSEM signal of IM yaw motion

3 μm 0.6 μm

30 μrad 2 μrad

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Optical LeverOptical levers to monitor mirror angles / displacement

1W SLD

Half Mirror

QPD2

QPD1 Collimator

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Out of loop performanceOptical lever signals about mirror pitch motion

Optical lever signals about mirror yaw motion

35 μrad 13 μrad

50 μrad 12 μrad

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Full Type-B Test

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Full Type-B Test@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

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Current Status• Vacuum system preparation• Height of the chamber is to be checked

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Current Status• Cleaning and remanufacturing of IP base• Finished on Jan. 28

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Current Status• Vacuum pod for geophone (seismometer) manufactured• Assembling and cabling should be done

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Current Status• An assembly frame is designed.

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Schedule• According to KAGRA schedule, prototype test is to

be finished until the end of March.

• Extremely tight!

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Main Tasks

• 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 KAGRAViolet: Time-consuming tasks

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We need your help!!

• We call for KAGRA-shift

• This prototype test is an absolutely important stepin considering installation procedure of actual system, and getting more realistic plan/schedule of VIS installation

39

iKAGRA schedule 2014 2015　 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12Fabry-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　 　　 　　 　　 　　 　　 　　 　　 　　 　　

Xarm commissioning 　 　　 　　 　

Full 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

procurementBS 　　　　　　　　　　　　　　　　　　　 　

Michelson commissioning 　 　　 　　 　　 　　 　　 　　 　　 　　 　　

Michelson commissioning　 　

Observation 　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　Obs.　

Schedule of VIS installation: iKAGRA

Dec 2015 operation

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END

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Appendix

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Close Loop TF