Status Report on the Alignment Activities at SLAC Catherine Le Cocq, Brian Fuss, Robert Ruland Stanford Linear Accelerator Center, Stanford, CA, USA The Stanford Linear Accelerator Center is operated by Stanford University for the U.S. Department of Energy.

Metrology Department Goals Support SLAC physics experiments. Guide all surveying and mapping efforts at SLAC. Promote accelerator alignment technologies inside and outside the laboratory. http://www.slac.stanford.edu/grp/met 11-12-02 Catherine Le Cocq

Current Experiments Future Developments PEP II http://www.slac.stanford.edu/accel/pepii E158 http://www.slac.stanford.edu/exp/e158 SPEAR 2 http://www-ssrl.slac.stanford.edu Future Developments SPEAR 3 http://ssrl.slac.stanford.edu/spear3 LCLS http://www-ssrl.slac.stanford.edu/lcls GLAST http://www-glast.stanford.edu NLC http://www-project.slac.stanford.edu/lc/nlc

SLAC/SSRL Site SPEAR LCLS PEP II e- injector ESA FFTB NLCTA BSY ESB Not to scale! 11-12-02 Catherine Le Cocq

PEP II & BABAR 2000 2002 Stations 604 359 Points 3636 3507 Tracker Triplets 13699 10446 Height Differences 1109 1311 Unknowns 15140 12679 2000 2002 D m 30 50 h m / D 40 v m / D 100 h m 11-12-02 Catherine Le Cocq

SPEAR: Mapping-Fiducialization-Assembly 11-12-02 Catherine Le Cocq

Future 11-12-02 Catherine Le Cocq Clean Room Tower Grid Far hall Undulator Far hall Near hall Clean Room Tower Grid 11-12-02 Catherine Le Cocq

Instrumentation Studies Classical Surveying Instruments Trackers / Total Stations Leveling Gyrotheodolites Others Devices: Offset Tilt Straightness… 11-12-02 Catherine Le Cocq

Model / Software Developments Network Analysis: LEGO Approximate Coordinates Determination New Type of Observation Error Checking Visualization Tool: SIMS Software Packaging: WinGEONET Others: Refraction Studies 11-12-02 Catherine Le Cocq

Mapping Effort X_global Z_SLAC Y_global X_SLAC Z_global ITRF2000 GPS: 3 Leica SR-530 receivers X_global Z_SLAC Y_global X_SLAC Z_global ITRF2000 -2703115.873 -4291767.294 3854247.829 NAD83 -2703115.209 -4291768.558 3854247.785 SLAC 60.54993 -2.41754 * Epoch of ITRF2000 and NAD83: 2002.36 GIS: MicroStation v8 with GeoGraphics 11-12-02 Catherine Le Cocq

Conclusion 11-12-02 Catherine Le Cocq