The SPEAR3 Upgrade Project at SLAC

1. The SPEAR3 Upgrade Project at SLAC Catherine Le Cocq, Brian Fuss, Michael Gaydosh Alignment Engineering Group SLAC

2. SPEAR History • 1972: Commissioning as a 2.4 GeV colliding beam facility. • 1974: Upgrade to 4 GeV. • 1991: Completion of a dedicated electron injector.SPEAR2 operates routinely at 2.3 GeV as a synchrotron radiation source. • IWAA97: “Re-Visiting SPEAR After 25 Years” poster by M. Pietryka and all. • 1997: Initial upgrade proposal. • 1999: Start of SPEAR3 upgrade project. • 2004: 3 GeV 100 mA operations. SLAC-SSRL-SPEAR 3 dedication event of January 29, 2004: “The project was completed three months ahead of schedule, and within its $58M budget.” IWAA2004

3. IWAA2004

4. SPEAR3 Goals • 3 GeV injection energy (increase from current 2.3 GeV). • 18 nm-radian beam emittance (reduction from 160 nm-radian). • 100 mA stored beam initially (same as SPEAR 2) with future increases towards 500 mA. IWAA2004

5. SPEAR3 Lattice • 18 magnet girders: • 14 standard cells • 4 matching cells • 18 straight sections: • 12 are 3.1 m • 4 are 4.7 m • 2 are 7.6 m • 234.126 m storage-ring circumference IWAA2004

6. Standard Cell Part 1 IWAA2004

7. Standard Cell Part 2 IWAA2004

8. Standard Cell Part 3 IWAA2004

9. SPEAR3 Magnets Summary • 36 gradient dipoles: • 28 full-length and 8 3/4 lenghth • 94 quadrupoles: • 4 different lengths: 0.60, 0.50, 0.35 and 0.2 m • 72 sextupoles • 2 different lengths: 0.25 and 0.21 m • 72 dipole correctors • 2 injection dipoles • 2 injection quadrupoles • 1 septum magnet IWAA2004

10. SPEAR3 Beamlines The 7 Insertion Devices beamlines stayed in the same position. The 4 bend magnets beamlines had to be moved. Here are their SPEAR3 characteristics with respect to the center of the upstream straight. IWAA2004

11. SPEAR3 Timeline • Network 0 • April SPEAR2 removal • May to mid June Floor construction • June 13 to 19 New monuments • Network 1 • June 26 – July 3 Mark templates • Network 2 • July 18 – August 1 Support plates • August to November Installation • Network 3 • November 17 to 23 Final alignment • December Commissioning • 2004 Network IWAA2004

12. Network 0 Description IWAA2004

13. Network 0 Composition • Booster TC2002 Survey: 9/2001 • BTS TC2002 Survey: 3/2002 • Building 130 Tracker Survey: 7/2002 • SSRL Tracker Survey: 9/2002 • SPEAR Ring Tracker Survey: 11/2002 • SSRL BL0 TC2002 Survey : 2/2003 IWAA2004

14. X X Z Z From SPEAR2 To SPEAR3 SPEAR2 Z offset = 90000 m X offset = 70000 m Y offset = 2000 m H O = 0.0 m 22 floor SPxxx3D SPEAR3 Z offset = 6000 m X offset = 3000 m Y offset = 500 m H O = 75.791 m 38 floor SMxxFx IWAA2004

15. Network 1 • Purpose: Give values to the new SPEAR3 monuments. • Description: • 166 points: • 121 ring monuments including 34 new floor and 4 old floor • 45 SSRL and BTS monuments • 46 laser tracker stations • 611 triplet observations: • Distances: 30 µm • Horizontal angles: 50 µm / D • Vertical angles: 50 µm / D • 144 height differences: 50 µm • Comment: • sigma a posteriori: 0.628621 (distance: 0.859524, horizontal angle: 0.450801, vertical angle: 0.563869, height difference: 0.782653) • Weighted datum IWAA2004

16. Network 2 • Purpose: Check the new floor stability before the alignment of the support plates. • Description: • 152 points: • 121 ring monuments • 31 SSRL and BTS monuments • 47 laser tracker stations • 676 triplet observations: • Distances: 30 µm • Horizontal angles: 40 µm / D • Vertical angles: 50 µm / D • 123 height differences: 50 µm • Comment: • sigma a posteriori: 0.825995 (distance: 0.832926, horizontal angle: 0.900147, vertical angle: 0.671085, height difference: 0.967139) • Free datum IWAA2004

17. Network 3 • Purpose: Assign new values to the SPEAR3 monuments before fine tuning all necessary magnets and vacuum chambers. • Description: • 368 points: • 122 ring monuments: 38 floor, 33 aisle, 50 wall and 1 ceiling • 45 SSRL monuments • 201 magnet TB • 40 laser tracker stations • 636 triplet observations: • Distances: 40 µm • Horizontal angles: 40 µm / D • Vertical angles: 50 µm / D • 303 height differences: 60 µm • Comment: • sigma a posteriori: 1.046304 (distance: 0.891794, horizontal angle: 0.802313, vertical angle: 1.206194, height difference: 1.245124) • Mixed datum with further 3-parameter transformation IWAA2004

18. HRLS105 HRLS100 HRLS090 SM14F5 SM05F5 HRLS010 HBL8N10 Datum Controlling Points HRLN025 IWAA2004

19. First Conclusion • December 11, 2003: first complete turn of an injected electron bunch around the ring. • By December 15, 2003: the RF system was operational and SPEAR 3 started accumulating beam up to 2 mA. • January 22, 2004: the stored current reached 100 mA (maximum current allowed for operation this year). • March 8, 2004: BL 9 was opened with first users March 15. • By end of March 2004: BL 10, BL 11, BL 6 and BL 5 were opened and ready for users. Extract from the SPEAR 3 Upgrade Project Close-out Report from April 2004: “Measurements of beam line parameters indicated that the SPEAR 3 optical performance goals were achieved.” IWAA2004

20. 2004 Network • Purpose: Map the whole ring as part as the 2004 Summer/Fall downtime. • Description: • 950 points: • 143 monuments: 37 floor, 32 aisle, 45 wall, 1 ceiling, 11 others and 17 SSRL points used for height only. • 807 magnet TBs • 44 laser tracker stations • 1809 triplet observations: • Distances: 40 µm • Horizontal angles: 50 µm / D • Vertical angles: 50 µm / D • 270 height differences: 50 µm • Comment: • sigma a posteriori: 0.938286 (distance: 1.287779, horizontal angle: 0.825724, vertical angle: 0.589023, height difference: 0.996919) • Mixed datum, offset between the 2 trackers IWAA2004

21. Floor Monuments ChangesNovember 2003 – October 2004 IWAA2004

22. Floor Monuments ChangesJuly 2003- November 2003 IWAA2004

23. Network Weak Spot BL11 ID IWAA2004

24. Magnet X as-built IWAA2004

25. Magnet Y as-built IWAA2004

26. Final Conclusion Next beam to beamlines will be Monday, October 18, at 6:00AM IWAA2004