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Beam Stability WBS U 1.03.02.02 and SPX Diagnostics WBS U 1.03.03.08

Beam Stability WBS U 1.03.02.02 and SPX Diagnostics WBS U 1.03.03.08. Glenn Decker Group Leader APS Accelerator System Division Diagnostics DOE Lehman CD-2 Review of APS-Upgrade 4-6 Decem ber 2012. Outline. Beam Stability Technical Motivation WBS Scope – Beam Stability Staff / Org Chart

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Beam Stability WBS U 1.03.02.02 and SPX Diagnostics WBS U 1.03.03.08

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  1. Beam StabilityWBS U1.03.02.02andSPX DiagnosticsWBS U1.03.03.08 Glenn Decker Group Leader APS Accelerator System Division Diagnostics DOE Lehman CD-2 Review of APS-Upgrade4-6 December 2012

  2. Outline • Beam Stability Technical Motivation • WBS Scope – Beam Stability • Staff / Org Chart • Requirements • Design • Interfaces • Risks • ES&H • Cost • Schedule • SPX Diagnostics DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  3. Beam Stability Technical MotivationWBS U1.03.02.02 • APS orbit correction system has a lot of out-of-date hardware. • Modernization of select beam position monitoring and feedback systems will benefit the entire APS user community. • With over 15 years of operational experience, the upgrade is tailored to the noise spectrum and lattice specific to APS. DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  4. Beam Stability and SPX Beam Diagnostics Project Scope and WBS Level 4U1.02.03.08, U1.03.02.02, & U1.03.03.08 DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  5. Beam Stability RequirementsWBS U1.03.02.02 • APS-U Beam Stability Physics Requirement Document APS_1428984 • Based on 5% of transverse beam dimensions up to 200 Hz and 10% up to 1 kHz. DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  6. Beam Stability Org ChartWBS U1.03.02.02 DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  7. Existing APS Beam Position Monitoring – One Sector ** * (Bergoz) *PUE = Pickup Electrode ** AM/PM = Amplitude to Phase conversion DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  8. Beam Stability ScopeWBS U1.03.02.02 *Note that GRID XBPM mechanical assemblies are in WBS 1.05.02 Front End Upgrades. DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  9. RF BPM ElectronicsWBS U1.03.02.02.01.01, U1.03.02.02.01.02 nm rms G. Decker, BIW10 DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  10. State-of-the-art Commercial Solution I-Tech Libera Brilliance+WBS U1.03.02.02.01.01 • Noise floor approaching 2 nm / √Hz • Long-term drift 200 nm p-p / 24 hours* • Integrated User FPGA support for feedback system development • Planned for small-aperture insertion device vacuum chambers for best source point control * Guenther Rehm, Diamond Light Source, EPAC 2008 DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  11. BPM Electronics APS BSP-100 Data AcquisitionWBS U1.03.02.02.01.02 • Eight channels/board, 88 MS/sec sampling. Altera FPGA processing. • One second (262144 samples) turn-by-turn beam history for machine studies / fault diagnosis. • Demonstrated noise floor < 10 nm / √Hz. • Used for ongoing broadband BPM upgrade (programmatic). • Planned for Bergoz rf BPM and legacy photon BPM data acquisition upgrade. DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  12. Next-Generation X-ray BPM SystemWBS U1.05.02 GRID-XBPM • Grazing incidence allows access to extremely high beam power (two U3.3 undulators at up to 150 mA). • X-ray fluorescence reduces stray radiation background signals significantly. • Use of two two-pixel (above, below midplane) pinhole cameras allows two independent measures of vertical x-ray beam position. • Inboard / outboard difference provides measure of horizontal beam position. • The upstream position monitor is referred to as the Grazing-Incidence Insertion Device X-ray Beam Position Monitor (GRID-XBPM). • Subject of Bingxin Yang’s talk to follow. PHC = Pinhole Camera IM = Intensity Monitor PS = Photon Shutter EM = Exit Mask DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  13. Real-time Feedback System UpgradeWBS U1.03.02.02.02 Existing System Upgraded System • Maximum 160 BPMs, 38 fast correctors • Sample rate 1.537 kHz • Based on 15-year-old digital signal processors, reflective memory • 3 dB BW = 60 Hz (H), 100 Hz (V) • Maximum approx. 500 BPMs, 70 fast correctors, 250 slow correctors • Sample rate Frev / 14 = 19.4 kHz • Based on extremely high-speed FPGA data protocols • Access to phase detectors, beam tilt monitors supporting SPX • Interfaced to main and SPX low-level rf (LLRF) systems • 3 dB BW > 200 Hz (correctors only), 1 kHz (w/ lord feedback) • Full-time FPGA expert (R. Lipa) hired into Diagnostics Group April 2012 DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  14. Real-time Feedback System Upgrade cont’dWBS U1.03.02.02.02 APS RTFB ESD ICMS APS_1431171 DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  15. First Fast Feedback Simulation Results Raw Horizontal Spectrum Synchrotron Tune Integrated Spectrum 360 Hz from Main RF Feedback Off* Feedback On *Feedback off data derived from measured beam spectrum Director's CD-2 Review of the Advanced Photon Source Upgrade Project 11-13 September 2012

  16. BPM Mechanical Motion SensingWBS U1.03.02.02.03 • Commercially-available capacitive motion sensors have sub-nm resolution. • Mechanical Design using invar supports integrated into GRID support system, pending for insertion device vacuum chamber monitoring. DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  17. BPM Mechanical Motion Sensing Cont’dWBS U1.03.02.02.03 DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  18. Beam Stability Required InterfacesWBS U1.03.02 • Feedback system interface control documents to be written: • Monopulse rf BPMs, Bergoz (narrowband) rf BPMs, Libera BPMs • Existing x-ray BPM electronics • GRID xBPM system data acquisition electronics • Steering corrector power supply controller • EPICS, including enumeration of process variables and their functions • Timing, including the APS event system • SPX diagnostics in sector 5 • Main 352 MHz low-level rf • SPX 2815 MHz low-level rf • The APS machine protection system (MPS) DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  19. Beam Stability RisksWBS U1.03.02 • No major risks • Beam stability could be temporarily degraded. • Single vendor for high-resolution rf BPMs possible concern. • Estimates and designs have been refined since last CD-1 review. • First high-power GRID XBPM tests completed, reducing technical risk substantially. DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  20. Beam Stability ES&HWBS U1.03.02 • Integrated Safety Management System (ISMS) • APS-U Project follows Argonne’s ISMS program requirements • Argonne Integrated Safety Management System (ISMS) Description recently revised and submitted to DOE ASO • Describes framework for integrating ESH requirements with mission objectives • References Argonne LMS procedures which implement specific portions of the ISMS • All electrical safety practices will be adhered to. • Diagnostics has its own designated electrical equipment inspector (NRTL). • The APS work request system will be used for work planning and control. DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  21. Response to Review Committee Recommendations • Machine Advisory Committee – Accelerator Physics 5/18 - 5/19 2012 (MAC 2012) “We recommend using the opportunity of this upgrade to move to an integrated, state‐of‐th­e‐art (orbit feedback) system and not to remain constrained by limitations of existing legacy systems. We caution that this is a significant manpower effort and suggest thinking about collaborations with other light sources (US or elsewhere).” • Response: A cell controller board has been borrowed from NSLS-II for evaluation, and feedback simulation efforts have been initiated in collaboration with NSLS scientists. In addition, a workshop on feedback is being planned. • MAC 2012 “…the beam-based feedback systems for SPX need further thought and detailed simulations. Ideally these systems would be integrated into the overall feedback system.” • Response: The present design is planned to be interfaced to both the main rf and SPX rf systems. • CD-2 Director’s Review 9/11 - 9/13 2012 “The cost estimates for … mechanical motion sensors may benefit from value engineering.” • Response: See next slide … DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  22. Beam Stability Value EngineeringWBS U1.03.02 Antenna • Evaluation of alternative methodologies for mechanical motion sensing are being explored with programmatic funding: • A nano-positioner and capacitive proximity sensor have been procured for evaluation. • The APS-developed BSP-100 data acquisition module is being used in as many applications as possible. Cavity Pickup • An APS-designed LCLS-style cavity BPM with fixed antenna has been constructed. DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  23. Beam Stability and SPX Beam Diagnostics Project Scope and WBS Level 6U1.02.03.08, U1.03.02.02, & U1.03.03.08 DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  24. Beam Stability and SPX Beam Diagnostics Project Obligation ProfileU1.02.03.08, U1.03.02.02, & U1.03.03.08 DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  25. Beam Stability and SPX Beam Diagnostics Summary ScheduleU1.02.03.08, U1.03.02.02, & U1.03.03.08 DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  26. Beam Stability and SPX Beam Diagnostics BOE Contingency U1.02.03.08, U1.03.02.02, & U1.03.03.08 DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  27. Work between CD-2 and CD-3 • Work Remaining for CD-3 • Perform first article GRID XBPM in-tunnel tests. • Finalize GRID-XBPM electronics and data acquisition design. • Complete real-time feedback hardware component selection. • Ramp up feedback simulation efforts in collaboration with BNL. • Perform mechanical motion sensing system mechanical design and prototype. • Finalize all ESDs and ICDs. • Beam Stability Electronic Systems Design Review DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  28. Beam Stability Summary • Beam Stability upgrade preliminary design is complete. • Beam Stability Physics Requirement Document drives • BPM and real-time feedback system design • SPX stability requirements • ID field quality specifications • The cost is $8,292k • We are ready for CD2. DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  29. Other Diagnostics-Related Activities • 1.03.03.08 SPX Diagnostics1.02.01.03.08 SPX0 Diagnostics (descoped)1.05.02.11 Next-Generation X-ray BPM System for HHL1.05.02.12 Next-Generation X-ray BPM System for CU DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  30. SPX Diagnostics Scope of WorkWBS U1.03.03.08 DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  31. Beam Arrival Time MonitorWBS U1.03.03.08.03 • Technology based on existing APS linac s-band phase detector system. • Interface uses APS BSP-100 data acquisition. • Specifications not too demanding – a fraction of the bunch length. DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  32. Beam Arrival Time Jitter Power Spectral Density 60 Hz 360 Hz from Main RF Synchrotron Tune στ= 2.1 ps = rms jitter, 0.3 Hz to 3 kHz στ(ω) = Square Root of reverse-integrated power spectral density Note: the rms bunch length for 24-singlets fill pattern is 33.5 ps. DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  33. Application of Phase Detector to Tilt Measurement* Vertical Bunch Position Phase Detector Output Vertical / Longitudinal Tilt Transient excitation of tilt using a fast vertical kicker** * N. Sereno et al., BIW2012 **W. Guo, PRST-AB 10, 020701 (2007) DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  34. Wire Position Monitor Test StandWBS U1.03.03.08.02 Courtesy of Bob Lill DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  35. High-Resolution Beam Size MonitorWBS U1.03.03.08.01 • High-resolution (9 microns rms) beam size monitor to be installed at unused bending magnet radiation port. • Bandwidth > 1 Hz DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  36. SPX Diagnostics SummaryWBS U1.03.03.08 • New diagnostics have all been demonstrated: • Beam arrival time (BAT) monitor • Wire position monitor • Repurposing of existing s-band phase detectors to direct tilt monitoring • We are ready for CD2 DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

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