Location

European Gravitational Observatory (site of the Virgo interferometer), Cascina (route description)

Program

Monday 13 October (seminar room)

10:00-13:00

• Introduction (Swinkels)
  
• Overview of Virgo super-attenuators (Boschi)
  
• Overview of Virgo payload, local control, hierarchical control (Majorana)
  
• Overview of LIGO HEPI/ISI/SUS and hierarchical control (Kissel)
  

13:00-14:00 lunch

14:00-18:00

• Overview of KAGRA suspensions(Sekiguchi)
  
• Overview of Nikhef-type minitowers/EIB (Van Heijningen)
  
• Overview of Hanover 10m suspensions (Mow-Lowry)
  

Tilt compensation

• Inertial damping, tilt control (Ruggi)
  
• Tilt sensing with gyroscopes, advanced control techniques (Boschi)
  

Tuesday (seminar room)

9:00 - 13:00

• New tilt meter at LHO (similar to LIGO-G1400848) (Kissel)
  

global control tricks

• Hanover suspension platform interferometer (Köhlenbeck)
  
• Global vs local damping (similar to LIGO-G1200774) (Shapiro)
  

sensing/damping of excited modes

• discussion about payload damping: with top stage (LIGO) vs with mirror actuators (Virgo)
  
• violin mode monitor (Sorazu)
  
• active violin mode damping at LIGO
• mirror/violin mode studies at Virgo (Swinkels)
  

13:00-14:00 lunch

14:00-18:00

• site visit (Swinkels/...)
  

noises

• charging issues (Sorazu)
  
• thermal issues (Hammond)
  

mechanical modeling

• Octopus (Ruggi)
  
• SimMechanics (Boschi)
  
• Mathematica (Sekiguchi)

Wednesday + Thursday

• work in groups
• present quick status update

Friday (morning only)

• present final results of group work
• discuss workshop report, future workshops
  

Participants

• Takanori Sekiguchi (KAGRA)

• Brett Shapiro (Stanford)
• Jeff Kissel (LHO)
• Arnaud Pele (LLO)
  
• Sebastien Biscans (MIT)
  

• Bas Swinkels (EGO)
  
• Maddalena Mantovani (EGO)
  
• Paolo Ruggi (EGO)
  
• Joris van Heijningen (Nikhef)
• Giles Hammond (Glasgow)
• Borja Sorazu (Glasgow)
• Valerio Boschi (Pisa)
• Loic Rolland (LAPP)
• Gabriele Vajente (CalTech)
• Flavio Travasso (Perugia)
• James Lough (GEO)
• Alessio Rocchi (Roma Tor Vergata)
• Ettore Majorana (Roma Sapienza)
• Sina Köhlenbeck (Hannover)
• Conor Mow-Lowry (Hannover)