LIGO-G M May 31-June 2, 2006 Input Optics (IO) Cost and Schedule Breakout Presentation NSF Review of Advanced LIGO Project David Reitze UF

LIGO-G M May 31-June 2, Input Optics Description & Deliverables The Input Optics conditions the light from the Pre-Stabilized Laser and sends it on to the main interferometer optical system Scope includes: » Power control into interferometers » Provide phase modulation of the input light –Electro-optic modulation –Routing optics, diagnostics (photodiodes, optical spectrum analyzers) » Filter spatially and temporally the light into the interferometer –transmission through the mode cleaner » Provide optical isolation as well as distribution of interferometer diagnostic signals –Faraday isolators –In vacuum non-suspended mirrors and optomechanical components » Mode match the light to the interferometer –beam-expanding telescope mirrors –CO2 laser and beam routing optics Scope also includes labor and travel for IO fabrication, assembly and testing at sites IO deliverables are met when all components are delivered to the site, assembled, tested, and past a ‘readiness’ check. $3.35 M $368k$847k$1.98 M

LIGO-G M May 31-June 2, Subsystem Work Breakdown Structure

LIGO-G M May 31-June 2, Subsystem Detailed Schedule Detailed schedule is available on Project website »

LIGO-G M May 31-June 2, Subsystem Schedule Highlights IO not on critical path

LIGO-G M May 31-June 2, Subsystem Milestones FABRICATION DEVELOPMENT

LIGO-G M May 31-June 2, Project Subsystem Interfaces Management » design and fabrication by UF –Lots of experience from initial LIGO » Oversight by Carol Wilkinson, LIGO Lab –Lab reviews of Input Optics –Travel to NSF reviews, sites, Caltech, MIT (LASTI) Optical » TO: Core Optics -IO Mirrors delivered to Core Optics for metrology » FROM: Core Optics -IO Mirrors delivered from Core Optics after metrology Mechanical » FROM: Suspensions –SUS designs and fabricates suspension and delivers to IO for assembly Electronic » FROM: ISC –ISC provides RF signals to modulators –ISC provides power control software –Mode cleaner length and alignment servo designed and built by ISC –ISC fabricated symmetric port (REFL) beam stabilization servo –ISC fabricates servo for adaptive mode matching (if needed) –ISC fabricates servo for active jitter suppression into mode cleaner (if needed)

LIGO-G M May 31-June 2, Subsystem Cost Estimating Used cost estimating approach based on initial LIGO » Capital equipment and M&S –Catalog prices for ‘off-the-shelf’ optical, mechanical, and diagnostic components Vendors: CVI Laser, New Focus, Newport, … –Vendor quotes for specialized components Suspended mirrors, beam routing (super)mirrors Vendors: Corning (blanks) Subcontracts: General Optics (polishing), REO (optical coatings), IAP (Faraday rotator), Raicol (modulator crystals) –Engineering estimates for UF ‘home-built’ opto-mechanics and electronics Escalated from LIGO 1 experience » Labor rates –Hours estimated based on LIGO 1 experience and extrapolated complexity to Advanced LIGO e. g. – 800 hrs/IFO to assemble and test mode cleaner and MMT suspensions before installation as opposed to 400 hrs in LIGO 1  triple suspension more complex » Travel –Estimated based on LIGO 1 experience and extrapolated complexity to Advanced LIGO

LIGO-G M May 31-June 2, Subsystem Cost by WBS Level 4

LIGO-G M May 31-June 2, Subsystem Staffing Profile

LIGO-G M May 31-June 2, Major Safety Issues for the Input Optics High laser power  180 W from laser » Overall Strategy: Project wide laser safety plan in place for LIGO Laboratory –under modification for Advanced LIGO Handling and transport of heavy components » e.g., Assembled mode cleaner triple suspensions » Mitigation: design robust ergonomic assembly and transportation tooling

LIGO-G M May 31-June 2, Subsystem Risks and Concerns Cost and Schedule risk: Damage to IO components during processing, metrology, and assembly » Spares built into procurement processing » Laser damage mitigated by LIGO Laser Safety Plan Schedule risk: Adaptive MMT optically complex and not prototyped at system (eg, LASTI) level » Added value, but not essential to AdvLIGO » Accelerate design; pursuing alternatives (ring heaters for MMT mirrors Schedule risk: Faraday isolator doesn’t meet vacuum requirements » Alternative vendors (Electro-optic Technologies)