LIGO-G A-M April 5, 2006 Interferometer Sensing and Control (ISC) Cost and Schedule Breakout Presentation NSF Review of Advanced LIGO Project Richard Abbott CIT

LIGO-G A-M April 5, ISC Description & Deliverables At a Total Cost of $7.426M, the ISC system provides the hardware and software for: » Sensing and controlling interferometer length –Radio Frequency (RF) detectors 4.1 ($268k) –RF Readout Chain 4.2 ($179k) –RF Signal Source ($159k) –ISC Signal Conditioning Electronics ($327k) –Real-time Processing & Networking ($469k) –ISC Analog-to-digital Converters (ADCs) ($657k) –Real-time Software 4.4 ($412k) –Diagnostic and Supervisory Software 4.5 ($303k) –Seismic Platform Interferometer 4.9 ($577k) » Optical Alignment systems –Alignment Sensing & Control (ASC) detectors ($506k) –ASC RF Demodulation ($194k) –Video Monitoring System ($401k)

LIGO-G A-M April 5, ISC Description & Deliverables (cont.) » Readout signals used to search for gravity waves –DC Readout detectors ($140k) –ISC Sensing Tables ($1.314M) –Output Mode Cleaner ($303k) » Reconfiguring parts of the vacuum envelope ($740k) –Vacuum Detection Infrastructure 4.8 ($740k) » Fabrication Testing and Validation 4.7 ($473k) In Process Spares included in deliverable costing

LIGO-G A-M April 5, ISC Work Breakdown Structure (WBS Dictionary Available at

LIGO-G A-M April 5, ISC Cost by WBS

LIGO-G A-M April 5, ISC Schedule Highlights

LIGO-G A-M April 5, ISC Staffing Profile

LIGO-G A-M April 5, ISC Major Milestones

LIGO-G A-M April 5, Subsystem Cost Estimating Basis Cost estimating reliant on extrapolation from initial LIGO experiences due to custom nature of electronics » Wherever possible, representative quotes taken from industry –PCB manufacturing facilities (PCB Express) –Circuit board stuffing (Screaming Circuits) –Huntington Vacuum etc. for standard vacuum parts –Accuglass Vacuum connections Estimates for LIGO designed electronics based on repackaging of existing designs wherever applicable Travel » Estimated based on LIGO 1 experience and extrapolated to Advanced LIGO complexity

LIGO-G A-M April 5, ISC Risks and Concerns Staffing availability » Schedule assumes personnel familiar with LIGO designs » Possible mitigation in improved standards for documentation and written processes » Training of personnel to expand their roles » Use of outside testing facilities Quality Control » Historically, this is a point of weakness » Efforts to mitigate include –Better test procedures –Use of unbiased outside testing facilities –Better pier review process

LIGO-G A-M April 5, Safety Practices Laser Safety » Laser safety practices will be in accordance with standing approved LIGO laser safety practices Electrical Safety » Systems with hazardous electrical voltages such as photo- diode bias supplies will be designed and used in accordance with approved LIGO electrical standards and procedures