e-Beams Systems Update

1. e-Beams Systems Update David Schultz • People • ARR • Linac Installation • Undulator Production • MMF Operations • CR Impact

2. New responsibilities in Linac and Undulator • Jose Chan is the new Control Account Manager for LCLS Injector and Linac Systems, taking over from Eric Bong. • Geoff Pile is the new Control Account Manager for Undulator Systems at ANL, taking over from Steve Milton.

3. Injector Accelerator Readiness Review • Safety Assessment Document • The LCLS SAD for Injector Commissioning was approved Jan. 24th. • Accelerator Readiness Review (ARR) • The ARR for Injector Commissioning was held October 31st. • The committee (in part) reconvened March 14th. • The four pre-start items were cleared by the time the ARR report was released. • Four comments from the SSO were also addressed. • Approval to commission was given April 4th.

4. Injector Accelerator Readiness Review

5. Injector Commissioning First electrons from the gun 4/5/07 • Injector Commissioning is underway. • Commissioning has been impeded by faulty hardware • Problems with quality of fabrication and installation of diagnostics • Instituted an RFI sign-off sheet, requiring approval from physics, engineering, controls, and metrology. Courtesy P. Emma

6. 2007 Commissioning Sector 21 Sector 20 Laser stopper BLM BC1 LX L1 Ins/SAB Wall See P. Emma’s talk

7. Installation Schedule 250 MeV 4.30 GeV 13.6 GeV 6 MeV 135 MeV Linac-X L =0.6 m Linac-0 L =6 m rf gun L0-a,b BTH west Linac-1 L 9 m Linac-2 L 330 m Linac-3 L 550 m 25-1a 30-8c 21-3b 24-6d ...existing linac 21-1 b,c,d undulator L =130 m X BC2 L 22 m BC1 L 6 m DL2 L =275 m 2007 down Now commissioning SLAC linac tunnel research yard

8. LCLS Installation and Commissioning Time-Line June 29, 2007 rmb DRAFT X-Ray tunnel/FEH Install X-Rays in FEH LTU/Und/Dump FEE/NEH Install First Spont. Light CF Early Occupancy X-Ray Systems Checkout - Commission e- beam & Photon Systems Checkout CD-4b CD-4a S O N D J F M A M J J A S O N D J F M A M J J A S O N D J F M A M 2007 2008 2009 2010 PPS PPS Photon Flux Measurements Controls checkout Re-commission Inj/BC2 to SL2 Operations LTU/Und/FEE Commissioning NEH Operations Linac/BC2 Commissioning linac/BC2 Install FEL Commissioning

9. ’07 Downtime Installation • Sept., Oct., Nov. 2007, a very tight schedule. • Installation of BC2 and L3, not L2. • Installation to support BTH-West • Cable plant installation through the BSY • Coordinated through the AD downtime schedule • IRR held March 16th. • All hardware is RFI or in the shop. • Cable plant inst. schedule is tight. • Scheduling and coordination between the different disciplines will be vital. See breakout talks

10. ’08 Installation LTU/Undulator/Dump • Readiness milestone for Early Occupancy installation held constant at Nov. 1, 2007 • Begin installation with: • Metrology • Beamline supports • Cable plant • Installation scheduling coordinated by R. M. Boyce • Installation contracts need to go to bid this summer. • Designs are being completed to support this. See breakout talk

11. Undulator Systems Components • Beam Finder Wire parts are in fabrication. • Wire card a SLAC responsibility, design underway. • RF Beam Position Monitor in production. • Body fabrication is in procurement. • First 3-BPM test results look promising, tests are ongoing • Vacuum Chamber – next slide • These systems are all near the critical path. • Quadrupole magnets’ 1st article in measurement at ANL. • Support/Mover system fabrication award made. • WPM/HLS FDR was held March 22nd • Production moving forward See G. Pile’s talk

12. Undulator vacuum chamber - 1 • As described last October, two competing designs were carried to the prototype stage, SS ‘4-Weld’ and Al ‘Clamshell’. • A review of Undulator Vacuum Chamber Design Options, was held Feb. 22nd • Permeability was a significant concern, and measurements and simulations were presented at the review • The 4-Weld design was selected to remain the baseline. • Recent measurements of the undulator field inside the SS vacuum chamber have raised concerns. • Physics requirements on field variations have been refined. • Short scale field variations cannot be measured with sufficient accuracy to remove doubt. • No satisfactory QA process for permeability is in hand. • The project needs to pursue other alternatives.

13. Undulator vacuum chamber - 2 The following course of action is being pursued: • Stainless steel design • Production has been stopped • Al extrusion design • Fastest option to a full scale prototype, and production • Accelerate machining trials & internal polishing tests • Cu tube design • Develop to the prototype stage as an option for 800eV operations. • Al clamshell design • Pursue polishing trials on existing chamber samples See breakout talks

14. Undulator Magnetic Measurement • All 40 undulators are at SLAC. • The MMF is in production mode, but behind schedule. • 6 undulators finished magnetically, but not RFI. • Undulators need support shims which have been redesigned and are being remade. • Production rate of 1 per week has been demonstrated. • “Exceptional” cases continue to be a problem. Adjusting the gap at the rough tuning stage requires a larger-than-specified range of wedge spacers. A broader range of spacers are on order. See breakout talk

15. CR Impact • Uncertainty as to which programs could continue and which needed to be deferred. • Led to lost efficiency and lost time. • Procurements were put on hold until the impact of the CR was resolved. • Linac and Controls • BC2, L3 2007 installation was held to schedule. • LTU, Und., Dump schedules set to accomplish CD-4a. • Additional manpower is needed to recover lost time. • Additional costs are needed to speed procurements.

16. CR Impact • Undulator work at ANL • The transfer of funding to ANL was slowed until the impact of the CR was resolved. • Significant procurements at ANL were put on hold. • Delays in ANL deliveries results in delays to Undulator assembly at SLAC • Undulator assembly and installation is on the CD-4a critical path • Additional manpower and costs are needed to recover lost time.

20. Issues • The ’07 downtime Linac installation schedule is very tight. • The schedule shows completion of installation • Hardware availability is being closely monitored • Controls checkout (last) is at risk. • The Undulator vacuum chamber design is changing • This is on the critical path. • A task force has been formed to manage the parallel options being pursued. • Cost and schedule plans for these options are developed. • The MMF is in production. • Have not yet sustained production throughput.