Status Report on the Alignment Activities at SLAC

1. 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.

2. 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 Catherine Le Cocq

3. Current Experiments • 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

4. SLAC/SSRL Site SPEAR LCLS PEP II e- injector ESA FFTB NLCTA PEP II e+ injector BSY ESB Not to scale! Catherine Le Cocq

5. PEP II & BABAR Catherine Le Cocq

6. SPEAR: Mapping-Fiducialization-Assembly Catherine Le Cocq

7. Future Far hall Undulator Near hall Clean Room Tower Grid Catherine Le Cocq

8. Instrumentation Studies • Classical Surveying Instruments • Trackers / Total Stations • Leveling • Gyrotheodolites • Others Devices: • Offset • Tilt • Straightness… Catherine Le Cocq

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

10. Mapping Effort • GPS: 3 Leica SR-530 receivers * Epoch of ITRF2000 and NAD83: 2002.36 • GIS: MicroStation v8 with GeoGraphics Catherine Le Cocq

11. Conclusion Catherine Le Cocq