1. BPM support and beam pipe length FD support status A.Jeremie

2. Schedule This week move all the material to “final” table Sensors come back from CERN July 8 : rare access around LHC! (coherence measurements) Do vibration measurements without water but all the parts July 8 to 11 Do vibration measurements with water July 11 to 18 July 21 to 25 pack everything and prepare transport Team of 3 arrives at KEK for 2 weeks on September 15

3. Once at KEK September-October discussions with Terunuma-san FD surface preparation (KEK or LAPP?) Needs to be ready before we arrive measure quad poletips after transportation (is this needed at this stage if we later open the magnets for BPM installation) Install plates, drill holes in floor and bolt them on floor Install table on plates (need crane) Install movers Install magnets on movers (need crane) (easier to move magnets without the BPMs installed) Open and close magnets for final BPM installation (who?) Adjust position of BPM wr to magnet Adjust magnet position wr to beam position and table (geometry team?) Did we forget something?

4. SBPM position w.r. to magnet

5. SBPM Sextupoles Quadrupoles IP QD0 QF1 SF1SD0 The distance between SBPM and magnet are given from the magnet core to the SBPM “left frame” (see next slide) FD layout

6. The distance between SBPM and magnet are given from the magnet core to the SBPM “left frame” 20mm For the quad, it’s from the “red” core to the SBPM “left frame” 30mm Readout point here at hole or is it at middle of this piece? Distance to readout point: Sextupole=>45.5 (45)mm Quadruploe=>55.5 (55)mm

7. S-band BPM support Adjustable in beam direction Adjustable in height with washers Adjustable transversally on intermediate support (not shown) Al SS What are the requirements for the range (0.5-1mm precision)? Along the beam we let 30mm range even if we later decided on the position of the BPM In height, we use washers In the transverse direction we have two solutions: an easy solution centered with 2mm adjustment or if needed an additional plate with a larger range (?)

8. This is how the BPM is supported We chose to put BPM on the electrical connection side of sextupole

9. Beam pipe length M.Woodely’s slides

10. FD configuration (T.Okugi’s presentation) SBPM QC3 SBPM FFTB 2.13 S3.00 SF1FF QF1FF 100 450.1 200 180 SBPM QC3 SBPM FFTB 2.13 S3.00 SD0FF QD0FF 100 76.2 450.1 200 18076.2 785380785380 2630 Sweeping Honda Shintake IP=> Table=2400 sextupole S-BPM chamber shown as 380 mm flange-to-flange quadrupole S-BPM chamber shown as 785 mm flange-to-flange sextupole S-BPM upstream flange to sextupole pole face shown as 180 mm quadrupole pole face to S-BPM downstream flange shown as 200 mm

11. Woodley’s Dimensioned Sketches using Okugi-san’s original chamber lengths for the S-BPMs

12. scale: 6 inches (drawing) = 1 meter (beamline) FF: SF1FF and QF1FF SBPM QC3 SBPM FFTB 2.13 S3.00 SF1FFQF1FF 76.2 450.1 575 200 180 MSF1FF MQF1FF 311.9 785380 456553.1

13. scale: 6 inches (drawing) = 1 meter (beamline) FF: SD0FF and QD0FF SBPM QC3 SBPM FFTB 2.13 S3.00 SD0FFQD0FF 76.2 450.1 200 180 MSD0FF MQD0FF 311.9 575 450.1 456553.1 785380

14. Woodley’s Dimensioned Sketches new chamber lengths for the S-BPMs that allow for 100 mm bellows module between S-BPMs sextupole S-BPM chamber: 360 mm flange-to-flange quadrupole S-BPM chamber: 755 mm flange-to-flange

15. scale: 6 inches (drawing) = 1 meter (beamline) FF: SF1FF and QF1FF SBPM QC3 SBPM FFTB 2.13 S3.00 SF1FFQF1FF 76.2 450.1 575 200 180 MSF1FF MQF1FF 311.9 755360 4565103.1 100

16. scale: 6 inches (drawing) = 1 meter (beamline) SBPM QC3 SBPM FFTB 2.13 S3.00 SD0FFQD0FF 76.2 450.1 575 200 180 MSD0FF MQD0FF 311.9 755360 4565103.1 100 FF: SD0FF and QD0FF

17. Mover preparation

18. Empty mover for finding “lowest” position: Flat section should show on top

19. Three LVDTs (Linear Variable Differential Transformer) measuring magnet position for mover control There is a “special” mover sextupole V-plate that does not allow positioning of this LVDT=> LVDT attachment modification and glass plates for good surface quality Photo of the “good” V-plate…to show the position of LVDT

20. Preliminary vibration measurements Presented by B.Bolzon at Nanobeam2008

21. Table fixed on one entire face to the floor Integrated RMS of table relative motion to the floor Above 0.2Hz with weight of FD on table: relative motion = 3.5nm  Very good compared to ATF2 tolerances (10nm)!!!  In reality, should be lower because measurement errors of 1% induce relative motion calculation errors of 1.6nm (GM at KEK > 0.2Hz: 164nm)

22. Integrated RMS of sextupole relative motion to the table Vibratory study of an ATF2 sextupole with its supports Between 0.7Hz and 13Hz: inaccurate measurements (low Signal to Noise Ratios and GURALP rocking on the magnet) Above 13Hz: relative motion of 0.26nm  Very good compared to ATF2 tolerances (10nm)!!!

23. Vibratory study of an ATF2 quadrupole with its supports Integrated RMS of quadrupole relative motion to the table Below 2.1Hz: inaccurate measurements (low Signal to Noise Ratio) Above 2.1Hz: relative motion of 2.4nm  Very good compared to ATF2 tolerances (10nm)!!!

24. Pending questions Glass slide refurbishing for LVDTs Suggestion of M.Woodley for the beam-pipe length w.r. to bellow length Position of BPM w.r. to magnet core=> BPM support finalising No answer yet for Benoit’s financing (for his 1 year stay: should have answer in coming weeks) Trouble finding thin shims but still searching (for the moment 0.5mm) Beeswax customs? Prepare customs for sending the material in September Register at KEK for radiation matters (we all had specific medical visits for radiation)

25. Left frame; small diameter Left support; large diameter Center frame Right cap Magnet side Beam pipe side