1. ATF/TTF Instrumentation March 19, 2007 Last report: January 22, 2007
Juan Cruz, Justin May, Doug McCormick, Steve Molloy, Janice Nelson, Tonee Smith, John Wray
19 March 2007

2. Projects Overview ATF DR BPM Upgrade ATF2 Magnet Movers
ATF2 Cavity BPMs
TTF HOM BPM
Bunch Length Monitor
19 March 2007

3. ATF RingBPM Project
Low Emittance Tuning considered very high priority R&D objective
No milestones decided by ART yet
From DR R&D mini-workshop in Frascati March 5-7, low emittance tuning section
Kiyoshi Kubo gave talk about ATF emittance tuning
After explaining the history of ATF’s low emittance tuning
19 March 2007

4. ATF RingBPM Project
Conclusions about previous emittance tuning efforts
From Kubo’s summary
19 March 2007

5. ATF RingBPM Project Trip Feb 13 – Mar 3 Summary of February 2007 trip
Tonee and Janice plus 6 from Fermilab:
Charlie Briegel, Dennis Nicklaus, Peter Prieto, Ron Rechenmacher, Duane Voy, Manfred Wendt
SLAC/FNAL collaboration is now very strong with frequent group meetings and communication
Manfred plans to send 6 again in May
Summary of February 2007 trip
4 ET modules (8 BPMs)
Optimized filter settings for ETs
Tested Calibration System
Perform limited BBA (on 8 BPMs) and beam studies to confirm system performance
19 March 2007

6. ATF RingBPM progress Demonstrated three measurement modes
Raw Data
Turn-by-Turn data
injection, extraction, or multi-thousand turn closed orbit data available upon request from EPICS
Narrow-Band
heavily averaged, high resolution data written every pulse
Optimized preliminary digitizer performance
Flexible FNAL timing module allowed on the fly changes to clock frequency
minimum ET decimation reduced by factor of 2 (at least)
One multiple-module problem solved
“improved” VME hardware requires modification for older modules (like ETs)
Another multiple-module problem under study
Sent a crate to FNAL for testing
19 March 2007

7. ATF RingBPM Project Lifetime measurement/resolution tests
Echoteks
19 March 2007

8. ATF RingBPM Project
Resolution measurement (P Emma method – orbit fitting difference orbits)
ET BPMs: / mm
ATF BPMs: / mm
19 March 2007

9. ATF RingBPM Project BBA data for 4 quads over two days Bowtie fits:
ET BPMs only vs. ATF BPMs only
19 March 2007

10. ATF RingBPM Project Y BBA (um) ET +/- ATF QF2R.10 343.38 6.44 15.15
17.10
316.49
34.40
174.00
QF2R.11
112.68
2.99
300.89
55.70
107.87
5.16
-89.69
165.00
QF2R.12
-72.69
5.07
85.70
-91.84
14.20
QF2R.13
1.19
323.00
37.20
-82.01
54.50
19 March 2007

11. Future Plans May trip (1-19ish)
6 from Fermi for RingBPM
Tonee, Justin and Doug going for ATF 2 test stand install
Bring 5 more modules (18 BPMs total)
Set up a second crate in the other arc
Try different calibration schemes & better optimize the filtering
Do more beam tests
Prepare hardware/software for outfitting ½ the ring in time for Fall startup
Funding & availability of ETs still uncertain
Both Japanese and US asking for money to fully outfit the ring (100 BPMs)
Finish hardware/software for rest of the ring soon thereafter (Spring 2008)
Project finishable pre-ATF2 (Oct 08)
19 March 2007

12. ATF2 Mover & QBPM Software
Magnet Movers and BPMs
Movers and BPM front-ends are delivered
Code development and testing in progress for mover control and calibration
Have hardware for one test stand available in ESB
Software core designed to be extensible and interfaced from a variety of sources
BPM code being developed in collaboration with RHUL, using lessons learned from NanoBPM
19 March 2007

13. TBD TBD (Japanese here tomorrow)
Form of deliverables (libraries, executables, databases)
Interaction between mover calibration procedure and magnet installation (during beam-line construction)
Interaction between mover database (and code) and decks
19 March 2007

14. ATF2 Test Stand coming soon
Will have a magnet mover with a ATF2 quad and cavity BPM in extraction line
Develop software for readout of BPM and control for magnet mover
Development of first-pulse operation scheme
Test stand installation predicted for May 1st.
Goals for May ’07 trip
Install magnet mover control cables & camac system
Install downmix electronics for QBPM on test stand, the Pohang prototype QBPM, and the reference cavity
Test calibration procedure and reverse-alignment (determine magnet<->pedestal alignment by mover response)
Thorough testing
19 March 2007

15. NanoBPM Use nanobpm system to test QBPM software In May:
Make the software more turn-key
19 March 2007

16. ATF Schedule FY07-FY09
19 March 2007

17. TTF Hom Results Trip in Jan. ’07
Readout fully integrated with TTF control system
Resolution & multi-bunch measurment
Using narrowband processing system
Process three pulses, third with no beam
Subtract propagated second pulse from third pulse
RMS of residual from linear fit to multi-step corrector bumps with saturated pulses cut
19 March 2007

18. TTF HOM Results (cont.) 19 March 2007 STDev = 4.387 um

19. Sample Results
19 March 2007

20. Bunch Length Monitor
Building for LCLS (with an eye towards its applicability to ILC)
300 GHz installed in ESA
Tests ongoing
19 March 2007

21. Summary ATF RingBPM ATF2 Movers ATF2 QBPMs
Successful installation of FNAL system for 8 BPMs
Exciting plans for trip in May: more people, more modules, more crates, more BPMs.
ATF2 Movers
(still) Ready for installation – 1 in May
ATF2 QBPMs
Exciting plans for May: hardware install, start software testing
19 March 2007

22. Summary (cont.) NanoBPM TTF HOM Bunch Length Monitor
Plans for enabling non-expert operation
TTF HOM
January 2007 trip amazingly successful
Bunch Length Monitor
Amplifier fabrication under way, will be ready for beam in March
19 March 2007

23. First Pulse Operation
19 March 2007

24. First Pulse Operation
19 March 2007

25. First Pulse Operation
19 March 2007