1. Robert Ruland Installation Alignment -Magnetic Measurements – Fiducialization ruland@slac.stanford.edu April 7-8, 2005 FAC Meeting 1 Installation Alignment, Magnetic Measurements and Fiducialization Robert Ruland Organization Installation Alignment Error Budget Ab-initio Alignment for BBA Conventional Global Straightness Magnetic Measurements Status of Magnetic Measurements Facility (MMF) Location, Construction Schedule Lay-out Test Bench Acquisition Status Test Stands Development Status Fiducialization Pointed Magnet Fixture Development CMM Acquisition Status Monitoring Systems Organization Installation Alignment Error Budget Ab-initio Alignment for BBA Conventional Global Straightness Magnetic Measurements Status of Magnetic Measurements Facility (MMF) Location, Construction Schedule Lay-out Test Bench Acquisition Status Test Stands Development Status Fiducialization Pointed Magnet Fixture Development CMM Acquisition Status Monitoring Systems

2. Robert Ruland Installation Alignment -Magnetic Measurements – Fiducialization ruland@slac.stanford.edu April 7-8, 2005 FAC Meeting 2 Organization

3. Robert Ruland Installation Alignment -Magnetic Measurements – Fiducialization ruland@slac.stanford.edu April 7-8, 2005 FAC Meeting 3 Undulator Alignment Tolerance Undulator The measured values for K eff shall be within ± 0.0005 (i.e., ± 0.015%) of the design values (LCLS Undulator Requirements PRD 1.4 – 001) 1.5*10 -4 correlates to 70 µm in Y, about 180 µm in X Quadrupoles 3 µm in X and Y over ~140 m Ab-initio alignment for BBA ~150 µm, desired 80 µm

4. Robert Ruland Installation Alignment -Magnetic Measurements – Fiducialization ruland@slac.stanford.edu April 7-8, 2005 FAC Meeting 4 Alignment Approach Global alignment of 70 µm very tough Instead will use BBA quads as alignment references for undulator segments Quadrupole and undulator segments are rigidly coupled by “cradle” mounting system, undulator segments follow quads BBA will align quad – undulator segment units to 3 µm level over undulator system length 70 µm tolerance is “reduced” from global (~140 m length) to relative (cradle) Relative alignment can be done on CMM in MMF

5. Robert Ruland Installation Alignment -Magnetic Measurements – Fiducialization ruland@slac.stanford.edu April 7-8, 2005 FAC Meeting 5 Undulator – to – Quad Tolerance Budget

6. Robert Ruland Installation Alignment -Magnetic Measurements – Fiducialization ruland@slac.stanford.edu April 7-8, 2005 FAC Meeting 6 Ab-initio Alignment Conventional alignment methods, Total Station, Laser Tracker, Digital Leveling yields ~200 µm Adding additional observations should yield position uncertainty of less than 100 µm Absolute measuring hydrostatic level measurements (ultra-sound sensor) Absolute measuring stretched wire measurements (optical wire detection)

7. Robert Ruland Installation Alignment -Magnetic Measurements – Fiducialization ruland@slac.stanford.edu April 7-8, 2005 FAC Meeting 7 Installation Alignment Workflow Will use standard installation alignment approach. Requirement: All components use registration features to preserve pre-alignment Install and measure alignment network Install floor anchors and foot plates Align foot plates to better than 0.5 mm Install granite tables onto foot plates Re-measure alignment network Align undulator mechanical supports and cams of mover system Install cradles Install Monitoring System: HLS and WPM Align Cradles Straightness measurements: Alignment Stretched Wire System, Portable HLS Align Cradles

8. Robert Ruland Installation Alignment -Magnetic Measurements – Fiducialization ruland@slac.stanford.edu April 7-8, 2005 FAC Meeting 8 LCLS Magnet Measurements Facility Proposed Location: Bldg 81, about 0.8 km away from tunnel Sufficient power for HVAC & test equipment Ground motion and vibration measurements did not indicate potential problems Manageable space constraints Construction Schedule T1 Aug 04 (Engineering) T2 Dec 04 (Final Construction Drawings) T3 May 05 (Construction Start) Beneficial Occupancy February 2006

9. Robert Ruland Installation Alignment -Magnetic Measurements – Fiducialization ruland@slac.stanford.edu April 7-8, 2005 FAC Meeting 9 Layout Floor plan divided into three functional areas Magnetic Measurements (± 0.1º C) Fiducialization and Assembly (± 1º C) Storage (± 2.5º C) Full set of specs: LCLS-TN-04-1 Z. Wolf, R. Ruland, "Requirements for the Construction of the LCLS Magnetic Measurements Laboratory“.LCLS-TN-04-1 Test stand lay-out is driven by requirement to match the Earth Magnetic Field conditions in lab to Undulator Hall, i.e. azimuth and gap orientation need to be identical

10. Robert Ruland Installation Alignment -Magnetic Measurements – Fiducialization ruland@slac.stanford.edu April 7-8, 2005 FAC Meeting 10 MMF Set-up Magnetic Measurements Undulator Test Bench #1 (8 m) final gap setting, final tuning Undulator Test Bench #2 (4 m) – existing prototyping procedures, software development, initial gap setting Hall Probe Calibration System Test magnet and NMR system Quad Integrated Field Strength Bench Stretched Wire Quadrupole Fiducialization Platform Vibrating Wire Pointed-Magnet Fixture Calibration Bench Fiducialization & Assembly Fiducialization CMM 4.5 m Quadrupole Fiducialization Platform Vibrating Wire mounted on CMM BPM, Diagnostics Fiducialization Assembly Cradle Assembly Bench Vacuum Chamber Alignment Bench Granite table with Height Gauge Undulator Segment / Cradle Storage At least 2 Und. Segments in MM lab (0.1º C) At least 2 Und. Segments in F&A lab (1º C) 8 Cradles, quads, BPMs, Vacuum chamber and misc. supports in F&A lab (1º C) About 20 undulator segments / cradles in storage area (2.5º C) Magnetic Measurements Facility Requirements, PRD 1.4 - 002

11. Robert Ruland Installation Alignment -Magnetic Measurements – Fiducialization ruland@slac.stanford.edu April 7-8, 2005 FAC Meeting 11 Undulator Test Bench Status 8m Magnetic Measurements Test Bench (MMTB) Implementation Schedule Evaluating RFP responses Award expected for early May delivery to coincide with MMF BO in Febr. 06 Installation, commissioning, MMF ready for measurements 5/30/06 Are using 5m bench obtained from APS for developing procedures and software (bench is being outfitted with equivalent hardware as 8m bench. Will be using 5m bench for preliminary gap setting during production

12. Robert Ruland Installation Alignment -Magnetic Measurements – Fiducialization ruland@slac.stanford.edu April 7-8, 2005 FAC Meeting 12 Undulator Fiducialization & Cradle Alignment Will use Coordinate Measurement Machine (CMM) for mechanical fiducialization measurements and alignment of components on cradle Specs: 2µm +L/350 accuracy, 4.5m x 1.2m x 1.0m volume Min 1500kg load capacity RFP being issued, due mid May Award expected for early June Delivery to coincide with BO of MMF

13. Robert Ruland Installation Alignment -Magnetic Measurements – Fiducialization ruland@slac.stanford.edu April 7-8, 2005 FAC Meeting 13 Undulator Fiducialization Status Proposed Method: Pointed Magnet Fixture Step 1: measure offset between undulator axis and pointed-magnet reference fixture on MM Bench Step 2: Measure pointed-magnet reference fixture wrt undulator fiducials on CMM Test measurements show an accuracy of 10 µm in X and 5 µm in Y See LCLS-TN-05-10 Y. Levashov and Z. Wolf, “Tests of coordinate transfer from magnetic to mechanical reference for LCLS undulator fiducialization”, in preparation

14. Robert Ruland Installation Alignment -Magnetic Measurements – Fiducialization ruland@slac.stanford.edu April 7-8, 2005 FAC Meeting 14 Quadrupole Fiducialization Status Finding the axis Will use Vibrating Wire prototype set-up. It promises better yaw and pitch resolution than pulsed wire. Implementation based on setup by Dr. Temnykh from Cornell Completed prototype setup for permanent magnets. Routinely achieved repeatabilities even in environment with wide temperature swings of better than 5 µm Test stand being re-designed for electro magnets Transfer onto quadrupole fiducials Use Wire Finders (developed for VISA) to locate wire and reference to its tooling balls Use Coordinate Measurement Machine (CMM) to transfer information from WF to Quad fiducials. Vibrating Wire system will be mounted onto optical table which can be set-up on undulator fiducialization CMM

15. Robert Ruland Installation Alignment -Magnetic Measurements – Fiducialization ruland@slac.stanford.edu April 7-8, 2005 FAC Meeting 15 Integrating Monitoring Systems into Cradle / Support System Since the cradle needs to be easily removable, we cannot attach the monitoring systems to it. Hence, both WPM and HLS need to be mounted to support table. However, the mounting has to be accomplish in a way which will force the sensors to follow the cradle motion

16. Robert Ruland Installation Alignment -Magnetic Measurements – Fiducialization ruland@slac.stanford.edu April 7-8, 2005 FAC Meeting 16 Hydrostatic Level System 3 rd generation sensors with: Improved stability Changed interface from RS485 to TCP/IP over 10BaseT with POIP

17. Robert Ruland Installation Alignment -Magnetic Measurements – Fiducialization ruland@slac.stanford.edu April 7-8, 2005 FAC Meeting 17 HLS Stability and Resolution

18. Robert Ruland Installation Alignment -Magnetic Measurements – Fiducialization ruland@slac.stanford.edu April 7-8, 2005 FAC Meeting 18 Stretched Wire system

19. Robert Ruland Installation Alignment -Magnetic Measurements – Fiducialization ruland@slac.stanford.edu April 7-8, 2005 FAC Meeting 19 WPM Stability and Resolution

20. Robert Ruland Installation Alignment -Magnetic Measurements – Fiducialization ruland@slac.stanford.edu April 7-8, 2005 FAC Meeting 20 END of Presentation