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Beam StabilityWBS U1.03.02.02
and
SPX DiagnosticsWBS U1.03.03.08
Glenn DeckerGroup LeaderAPS Accelerator System Division Diagnostics
DOE Lehman CD-2 Review of APS-Upgrade4-6 December 2012
Outline
Beam Stability Technical Motivation WBS Scope – Beam Stability Staff / Org Chart Requirements Design Interfaces Risks ES&H Cost Schedule SPX Diagnostics
2
DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012
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APS orbit correction system has a lot of out-of-date hardware.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.
3
DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012
Beam Stability and SPX Beam Diagnostics Project Scope and WBS Level 4U1.02.03.08, U1.03.02.02, & U1.03.03.08
4
DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012
k$Labor Nonlabor TOTAL
U1 1,851 5,779 1,040 568 9,296 02.01.03 - Diagnostics R&D 80 1 - 16 98 03.02.02 - Beam Stability 1,333 5,482 935 541 8,292 03.03.08 - SPX Diagnostics 437 296 104 10 906
DIRECT (k$)WBS
ESCALATION ($k)
DIV OH + ANL G&A ($k)
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.
5
DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012
Beam Stability Org ChartWBS U1.03.02.02
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DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012
Existing APS Beam Position Monitoring – One Sector
7
*PUE = Pickup Electrode** AM/PM = Amplitude toPhase conversion
***
(Bergoz)
DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012
Beam Stability ScopeWBS U1.03.02.02
8
*Note that GRID XBPM mechanical assemblies are in WBS 1.05.02 Front End Upgrades.
Item Scope Expected Improvement
New BPM electronics and data acquisition
80 high-resolution rf BPMs,80 Bergoz rf BPMs,70 ID photon BPMs,70 BM photon BPMs
Factor of 2, AC noise floor.
New hard x-ray BPM systems*
14 units installed in new front ends
Factor of 2, long-term pointing stability
Real-time feedback system
Complete replacement with modern components
Extend closed-loop bandwidth from 60 to 200 Hz; reduce AC beam motion by a factor of 4.
BPM mechanical motion sensing
Install for 14 GRID XBPMs and 68 rf BPMs
Factor of 2, long-term drift
DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012
RF BPM ElectronicsWBS U1.03.02.02.01.01, U1.03.02.02.01.02
9
G. Decker, BIW10
nm rm
s
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 Acquisition
WBS 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
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.
12
S5 S1Undulator(s)
XBPM1
Corrector-B
Corrector-A
PHC-AB
"Stray Radiation"
Decker Fan
EM(18.6 m) (25 m)& Dipole Fan
PHC-CD
PS2(22 m)
BeWindow
IM1 IM2XBPM2XBPM1
PHC = Pinhole CameraIM = Intensity MonitorPS = Photon ShutterEM = Exit Mask
Next-Generation X-ray BPM SystemWBS U1.05.02
DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012
GRID-XBPM
Real-time Feedback System UpgradeWBS U1.03.02.02.02
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)
13
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
Existing System Upgraded System
DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012
Real-time Feedback System Upgrade cont’dWBS U1.03.02.02.02
14
APS RTFB ESD ICMS APS_1431171DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012
Director's CD-2 Review of the Advanced Photon Source Upgrade Project 11-13 September 2012
15
First Fast Feedback Simulation Results
Integrated Spectrum
Feedback Off*
Feedback On
Raw Horizontal Spectrum
*Feedback off data derived from measured beam spectrum
SynchrotronTune
360 Hz fromMain RF
BPM Mechanical Motion SensingWBS U1.03.02.02.03
16
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
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)
18
DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012
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.
19
DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012
Beam Stability ES&HWBS U1.03.02
20
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
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 th e‐ ‐ ‐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 …
21
DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012
Beam Stability Value EngineeringWBS U1.03.02
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.
22
DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012
An APS-designed LCLS-style cavity BPM with fixed antenna has been constructed.
Antenna
Cavity
Pickup
Beam Stability and SPX Beam Diagnostics Project Scope and WBS Level 6U1.02.03.08, U1.03.02.02, & U1.03.03.08
23
DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012
k$
Labor Nonlabor TOTALU1 1,851 5,779 993 672 9,296
02 - RESEARCH & DEVELOPMENT (R&D) - Accelerator Systems 80 1 - 16 98 02.01 - Accelerator Systems R&D 80 1 - 16 98
02.01.03.08 - Diagnostics R&D 80 1 - 16 98 03 - ACCELERATOR SYSTEMS 1,770 5,778 993 656 9,198
03.02 - Storage Ring Technical Components 1,333 5,482 935 541 8,292 03.02.02 - Beam Stability 1,333 5,482 935 541 8,292
03.02.02.01 - BPM Electronics (40) 215 1,824 187 115 2,341 03.02.02 - ACWP 23 - - 5 28 03.02.02.01.01 - ID RF BPM's 55 1,154 117 53 1,379 03.02.02.01.02 - Bergoz Upgrade 46 80 9 13 147 03.02.02.01.03 - X-Ray BPM Electronics 91 590 62 43 786
03.02.02.02 - Realtime Feedback Upgrade (1) 632 558 170 179 1,540 03.02.02.03 - BPM Mechanical Motion Sensing (34) 349 3,100 556 200 4,204 03.02.02.04 - Integration & Installation - Beam Stability 137 - 22 48 207
03.03 - Short Pulse X-ray 437 296 58 115 906 03.03.08 - Diagnostics System 437 296 58 115 906
03.03.08 - ACWP 79 - 1 17 96 03.03.08.01 - Vertical Beam Size Monitor 114 148 20 32 313 03.03.08.02 - Wire Positioning Monitors 139 88 22 37 287 03.03.08.03 - Beam Arrival Time Monitor 106 60 16 29 210
ESCALATION ($k)
DIV OH + ANL G&A
($k)WBS
DIRECT (k$)
Beam Stability and SPX Beam Diagnostics Project Obligation ProfileU1.02.03.08, U1.03.02.02, & U1.03.03.08
24
DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012
Beam Stability and SPX Beam Diagnostics Summary ScheduleU1.02.03.08, U1.03.02.02, & U1.03.03.08
25
DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012
Beam Stability and SPX Beam Diagnostics BOE Contingency U1.02.03.08, U1.03.02.02, & U1.03.03.08
26
DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012
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
27
DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012
Beam Stability Summary
28
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
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
29
DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012
SPX Diagnostics Scope of WorkWBS U1.03.03.08
30
DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012
Beam Arrival Time MonitorWBS U1.03.03.08.03
31
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
Beam Arrival Time Jitter Power Spectral Density
32
SynchrotronTune
360 Hz fromMain RF
60 Hz
στ = 2.1 ps = rms jitter, 0.3 Hz to 3 kHz
Note: the rms bunch length for 24-singlets fill pattern is 33.5 ps.
στ(ω) = Square Root of reverse-integrated power spectral density
DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012
Application of Phase Detector to Tilt Measurement*
33
Transient excitation of tiltusing a fast vertical kicker** * N. Sereno et al., BIW2012
**W. Guo, PRST-AB 10, 020701 (2007)
Vertical Bunch Position
Phase Detector Output
Vertical / Longitudinal Tilt
DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012
Wire Position Monitor Test StandWBS U1.03.03.08.02
34
Courtesy of Bob Lill
DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012
High-Resolution Beam Size MonitorWBS U1.03.03.08.01
35
DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012
High-resolution (9 microns rms) beam size monitor to be installed at unused bending magnet radiation port.
Bandwidth > 1 Hz
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
36
DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012