Meetings

We will start 9:30 in the big seminar room (103) at AEI.

Program

• Daniel Brown: Hands-on session on Finesse with radiation pressure
• Sean Leavey: Mini-tutorial on AEI10m single arm test auto-alignment design
• Emil Schreiber: Commissioning workshop report / tutorial on modern controls

LUNCH break

• Anamaria Effler: On aspects of aLIGO ISC
• Jan-Simon Hennig: Optical Layout for the Glasgow Sagnac Speed Meter
• Harald/Hartmut: ISC in GEO, i.e. what sidebands are resonant where and from what PDs and demodulations the error signals for all the lengths are obtained
• Conor Mow-Lowry: Inertial and position control of the AEI Seismic Attenuation System with blended sensors
• Grant Meadors: Offline substraction of MICH from DARM for LIGO data (https://dcc.ligo.org/LIGO-G1400344)
• Time for discussions on ET-Control work (related to Aspera proposal)

Finish around 5pm.

Title: GEO Sensing and Control meeting

Community: Virgo - LSC

Password: inflation

The next meeting will take place on the 6th of December 2012. We will start at 9:30am in the seminar room in the Applestrasse.

Program (morning session)

• Michael Born: CDS tutorial
• Christoph Affeldt: Matching-Magic in RF circuitry (postponed due to illness)
• John Macarthur: Local Readout experiment
• Conor Mow-Lowry: Blended Sensor technique (postponed due to illness)
• Kate Dooley: Tutorial about alignment systems presentation

Lunch break. reconvene at 2pm

• Sean Leavey: Control for smart grid applications
• Tobin Fricke: Intro to state based modeling
• Dirk Schuette: Guided discussion on alternative suspension controls
• Small group time: Small group tutorials and/or working on hot topics:
  1. How to get a TF out of Optcikle?
  2. Small Finesse tutorial
  3. Feedback-loop design tutorial
• Plenum: See how we got on in the small groups.

Finish at 5pm.

Title: GEO-ISC meeting

Description: 7th meeting of the GEO sensing and control group

Community: Virgo - LSC

Password: isc_nikolaus

The meeting will start at 09:30 in the big Seminar room (103) at AEI Hannover.

• Welcome (Stefan)
• TUTORIAL: INTRODUCTION TO BASIC CONTROL (Michele Heurs), ⇐ this is a 1.5-2h tutorial aimd at folks with less experience in control techniques.
• Quantization noise (Tobin Fricke)
• Request for favorite resources

LUNCH BREAK, restart at 2pm

• Classical Pendulum Control: Geo-style vs Modal Damping (Tobias Westphal)
• AEI-10m Reference Cavity longitudinal control (Fumiko Kawazoe)
• MISO control schemes. Adaptive filtering and Wiener filtering (Mirko Prijatelj)
• Introduction to Neural Networks (Holger Wittel)
• Plans on table-top experiments towards Newtonian noise subtraction (Frank Brueckner)

We plan to be finished at leastet at 5pm.

Title: GEO-ISC meeting

Description: 6th meeting of the GEO sensing and control group

Community: Virgo - LSC

Password: isc_hannover

This meeting will be hold together with the GEO-SIM group. We intent to start on Monday morning and finish by Monday evening.

For the morning agenda please see GEO-SIM wiki.

The ISC meeting will start at 13:30 in the big Seminar room at AEI Hannover.

• Possible choices for the GEO-HF EOMs (Christoph Affeldt)
• Discussion and Decision on GEO-HF EOMs (Stefan, all). — Relevant background information can be found on the LIGO DCC.

Break

• Modern controls for quantum optical systems (Maximillian Wimmer).
• LG33 mode experiments at the Glasgow 10m-interferomete (Borja Sorazu).
• The AEI-10m SubSQL interferometer with tunable stability (Christian Graef).
• Next meeting etc (Stefan, all)

Title: GEO SIM and ISC meetings

Description: Meetings of the GEO Simulation and the GEO Sensing and Control meetings

Community: Virgo - LSC

Password: geo_meeting

The meeting will start at 13:30 and take place in the main seminar room of the AEI Hannover. The talks will vary in length between 15 and 30 minutes

• Towards the SPI (Katrin Dahl)
• Steering mirror action-what they should and what they can do (Fumiko Kawazoe)
• Length sensing and optical design aspects for the AEI-10m (Christian Graef)
• Discussion on the starting configuration of the AEI-10m (Stefan Hild, all)

Break

• GEO-HF high power operation (Christoph Affeldt)
• Control of squeezed light in GEO-HF (Hartmut Grote)
• Suspension Parameter Sensitivity Analysis (Ken Strain)
• Drag-free control on Lisa Pathfinder (Martin Hewitson)
• Standard Quantum Limit from a different perspective (Tobias Westphal)
• Michelson interferometer with 3-port grating coupled arm cavities (Michael Britzger)

The morning GEO Sim talks can be found on the GEO SIM Wiki.

Title: GEO SIM and ISC meeting

Description: Meetings of the GEO Simulation group and the GEO sensing and control group

Community: Virgo - LSC

Password: GEO-May

The meeting will take place in the main seminar room of the AEI Hannover.

All talks will be between 15 minutes and 1 hour or so and we should have plenty of time in between for discussions …

Morning session (9:30 -12:00)

• Mirko Prijatelj: GEO600 - The output mode cleaner
• Holger Wittel: Gravel-mining and GEO600 - the need for active seismic isolation
• Andre Thuering: Noise and Control issues for Filter Cavities
• David Rabeling: Impedance matching locking (for advanced Virgo?)

Afternoon session: (13:30 - 16:30)

• Matt Edgar: Optical Spring measurements in the Glasgow 10m interferometer
• Fumiko Kawazoe: Servo design for the AEI-10m reference cavity
• Christian Graef: Length sensing for the AEI-10m sub-sql interferometer (Video)
• Daniel Brown : Simulating gratings with the FDTD method
• Paul Fulda: Interferometric sensing and control with LG33 modes

14th of December. AEI Hannover. 9:30 to 17:00

Combined meeting of GEO-SIM and GEO-ISC (Main Seminar Room)

10:00 - 10:15 Welcome and News (Andreas + Stefan)

10:15 - 10:45 Electrostatic actuators for the AEI-10m main test masses (Holger)

10:45 - 11:45 Autoalignment design of the AEI-10m refernce cavity (Fumiko)

11:45 - 12:30 Start of the review process (all)

lunch break

14:30 - 15:00 Dynamical signal recycling tuning of GEO 600 (Dimitry)

coffee break

15:30 - 16:15 Optickle simulation tool for high power interferometers (Maddalena)

16:15 - 16:45 Optickle Hands-on-session: Creating a simple Optickle simulation from scratch (postponed to dedicated workshop)

16:45 - 17:15 Optickle Problem-session: Discuss our Optickle Problems … (postponed to dedicated workshop)

17:15 - 17:20 Close out

If you want to use Optickle on your own computer during the hands-on sessions please use this verison of Optickle

A draft of the agenda can be found here.

Welcome and Introduction to the meeting (Stefan Hild)

Future ISC chellenges in GEO-HF (Hartmut Grote)

Future ISC challenges in the Glasgow 10m (Bryan Barr)

Future ISC challenges for the AEI-10m sub-SQL-ifo (Stefan Hild)

Violin Mode Detector (Nick Lockerbie)

ISC group from the simulation groups perspective (Andreas Freise)

Digital vs Analog control at the beginning of the 2010 decade (Martin Hewitson)

Overview of the ALIGO CDS (Christian Graef)

Experience with CDS for control of the GEO600 OMC (Mirko Prijatelj)

Sensing and Control of the AEI-10m reference cavity (Fumiko Kawazoe)