Advanced LIGO Subsystem DescriptionsagendaPre-stabilized laser (PSL)Pre-stabilized laserPSL: program status, progress & changes since 2006PSL: changes & progress since 2006PSL: recommendations from 2006 reviewPSL: near term plans and project readinessInput OpticsIO: program status, progress & changes since 2006Slide 11IO: recommendations from 2006 reviewIO: near-term plans and project readinessCore Optics ComponentsCOC: development status, progress & changes since 2006Slide 16COC: recommendations from 2006Slide 18COC: near term plans and project readinessAuxiliary Optics Subsystem (AOS)AOS: development status, progress & changes since 2006Slide 22AOS: recommendations from 2006AOS: near term plans and project readinessInterferometer Sensing & Control (ISC)ISC: development status, progress & changes since 2006Slide 27ISC: recommendations from 2006Slide 29ISC: near term plans and project readinessSystems Engineering (SYS)SYS development status, changes & progress since 2006Recycling cavity geometryRecycling cavity geometry: status & plansParametric InstabilitiesParametric Instabilities: 2006 statusParametric instabilities: progress since 2006Parametric instabilities: plansSYS: recommendations from NSF 2006 ReviewSYS: near term plans and project readinessData Acquisition, Diagnostics, Networking & Supervisory Control (DAQ) SubsystemDAQ development status, changes & progress since 2006Slide 43DAQ: recommendations from 2006 reviewDAQ: near-term plans and project readinessData Computing System (DCS)DCS program status, changes and progress since 2006DCS: recommendations from 2006 reviewSlide 49DCS: near term plans and project readinessSeismic Isolation Subsystem (SEI)SEI development status, changes and progress since 2006SEI: recommendations from 2006SEI: near term plans and project readinessSuspension Subsystem (SUS)SUS development statusSlide 57SUS: changes and progress since 2006SUS: recommendations from 2006SUS: near term plans and project readinessFacility Modifications & Preparation (FMP)Ultra-High Vacuum (UHV) Preparation & CleanlinessSlide 63FMP development status, changes and progress since 2006FMP: recommendations from 2006FMP: near term plans and project readinessInstallation (INS) WBS FunctionsBasic StrategyINS Procedure Development & Training at the MIT LASTI FacilityInstallation Tooling Developed to DateInstallation Tooling Developed To Date (continued)INS: recommendations from 2006SummaryLIGO-G070372-00-MAdvanced LIGO Subsystem Descriptions NSF Review of Advanced LIGO Project5 June 2007Dennis Coyne, CaltechPeter Fritschel, MIT2LIGO-G070372-00-MagendaPre-Stabilized Laser (PSL)Input Optics (IO)Core Optics Components (COC)Auxiliary Optics System (AOS)Interferometer Sensing & Controls (ISC)Systems Engineering (SYS)Data Acquisition, Diagnostics, Networking & Supervisory Control (DAQ)Data Computing System (DCS)Seismic Isolation (SEI)Suspensions (SUS)Facility Modifications & Preparation (FMP)Installation & System Test (INS)3LIGO-G070372-00-MPre-stabilized laser (PSL)High power laser: 180 WattsLaser frequency pre-stabilization & frequency actuationPre-mode cleaner for spatial clean-up and high-frequency filteringDiagnostic toolsLaser power stabilizationLaser safety measuresFacility infrastructure »Laser and laser diode enclosures»Instrument racks, crates, power supplies»Supervisory controls & DAQ interfacingSupplied by Max Planck Inst. / AEISupplied by LIGO Lab4LIGO-G070372-00-MPre-stabilized lasermediumpowerstagehighpowerstageNPROreferencecavityAOMpre-modecleanerto interferometermaster oscillatoroscillatoramplifierisolatorMedium and high power stages made by Laser Zentrum Hannover (LZH)Enhanced LIGO lasers are first 2 stages of the AdLIGO laser5LIGO-G070372-00-MPSL: program status, progress & changes since 2006 AEI funding is approved, contract between AEI & LZH in placeFully staffed: 7 people @ LZH, 4 @ AEILZH labs renovated»Clean, temperature stable environment for laser assemblyFirst NPROs for the observatories arrived»Innolight Mephisto: undergoing characterizationFirst Enhanced LIGO prototype laser (35 W) to be delivered to LIGO in summer 2007»First observatory laser near end of yearMOU between AEI and LIGO Lab is in preparationFront-end (medium power stage) changed from oscillator to amplifier6LIGO-G070372-00-MPSL: changes & progress since 2006Laboratory prototype: design improvements & characterization»Front-end changed to amplifier»Resonator design optimized»Critical components identified and upgraded»Improved beam quality»Improved injection locking»Noise performance characterized»Current state: 150 W output power, 85% in TEM00 mode, operates 8-10 hrs continuously every dayFunctional prototype: being built now»Improved laser head design»Improved pumping design (higher efficiency)»Two new heads tested in a standing wave resonator: 90 W TEM00Overall development plan:Laboratory prototypeFunctional prototypeEngineeringprototypedemonstrate conceptsdemonstrate specsfit / form / functionNowComplete integration tests & begin production: Sep 20097LIGO-G070372-00-MPSL: recommendations from 2006 reviewThe Panel encourages the German team to continue their effort and suggest that they share problems of added noise in photodiodes with researchers at NIST that face similar issues.»power stabilization effort continued, stabilization of 35W laser »photodiode characterization and tests ongoing»contact between B. Willke and L. Hollberg at ASSP conference on photodiode research»contact initiated by T. Carruthers between AEI and NRL on high power photodiodesThe Panel suggests the AEI/LIGO Laboratory monthly meetings be formalized with formal meeting minutes.»bi-weekly telecon meetings with minutes on the PSL Wiki8LIGO-G070372-00-MPSL: near term plans and project readinessDiagnostic breadboards»3 being built to allow reliable, reproducible and comparable tests of laser parameters at AEI, LZH & LIGOPre-mode cleaner development»First version designed, parts on order»Design (finesse = 50) based on thermal loading experiments at Stanford»Options for next version: sealed housing (vacuum); longer cavity for increased RF filteringPreliminary design complete: Dec 2007Final design complete: Sep 20099LIGO-G070372-00-MInput OpticsElectro-optic modulators for phase modulationContinuous variable attenuationOptical isolation & delivery of IFO reflected beamMode matching to