1. A.Jeremie, B.Bolzon, N.Geffroy, C.Girard, (G.Gaillard)
Stable support for FD
A.Jeremie, B.Bolzon, N.Geffroy, C.Girard, (G.Gaillard)
Andrea JEREMIE

2. Outline Measurements on table Work done by G. Durand with drawings
Discussion on table length
Andrea JEREMIE

3. Discussion on table length
Andrea JEREMIE

4. Notice that in this drawing the magnets are not always at same position on the mover
Andrea JEREMIE

5. Marc Woodley’s answer to the design distances
Hi Andrea, In ATF2v3.7Layout.ppt, the dashed lines around magnets represent the approximate extent of the coils; the lengths quoted for the magnets are the core lengths (not the effective lengths).
The center-to-center separations of the magnets are what defines the layout:
QD2AFF -> SF1FF : 4875 mm center-to-center
SF1FF -> QF1FF : 575 mm center-to-center
QF1FF -> SD0FF : 790 mm center-to-center
SD0FF -> QD0FF : 575 mm center-to-center
QD0FF -> IP : 1225 mm center-to-IP -Mark
Andrea JEREMIE

6. ! 10cm too short! QD0 SD0 QF1 SF1 245 310 245+575+790+575+310= 2495
Magnet center to center distances
2400
10cm too short!
Andrea JEREMIE

7. =>Look for longer table
From Marc Woodley’s presentation on July 18
FF: MS2FF and Final Doublet
QC3
QC3
180
180
Sweeping
180 MS
FFTB
2.13
S3.00
SBPM
SBPM
FFTB
2.13
S3.00
SBPM
SBPM
Shintake
100
100
100
100
Honda
76.2
76.2
370
200
370
200
450.1
450.1
MS2FF
SF1FF
QF1FF
SD0FF
QD0FF
S-band BPM outside table but attached on a “heavy” QD0=> no problem of support or does it need an additional support?
S-band BPM outside table on a “light” Sextupole=> how will the S-band BPM be supported?
TMC 2400mm table: first resonant frequency in free-free configuration at 230Hz
=>Look for longer table
Andrea JEREMIE

8. Move back the table? TMC builds a 3000mm table Sweeping Shintake Honda
QC3
QC3
Sweeping
Shintake
180
180
180 MS
FFTB
2.13
S3.00
SBPM
SBPM
FFTB
2.13
S3.00
100
100
100
SBPM
SBPM
100
Honda
76.2
76.2
370
200
370
200
450.1
450.1
MS2FF
SF1FF
QF1FF
SD0FF
QD0FF
Will be able to support everything, but gets into a very crowded zone!!! Problem with Shintake monitor support (that will support the Honda monitor). What about the sweeping magnet support?
Move back the table?
Andrea JEREMIE

9. What can we do if we keep the 2400mm table?
TMC builds a 3000mm table
QC3
QC3
Sweeping
180
180
180 MS
FFTB
2.13
S3.00
SBPM
SBPM
FFTB
2.13
S3.00
Honda
100
100
100
SBPM
SBPM
100
76.2
76.2
370
200
370
200
450.1
450.1
MS2FF
SF1FF
QF1FF
SD0FF
QD0FF
Don’t know anything about what is in the back of FD. What is the MS2? What is the support envisaged? Is there something else in the back?
Longer table has a lower first resonant frequency at 185 Hz thus uncertainty on behaviour when fixed and under load
What can we do if we keep the 2400mm table?
Andrea JEREMIE

10. What we need to define How do we attach the movers to the table?
How do we compensate for the 400mm height difference to the beam?
How do we attach the table to the floor?
We will use a base-plate: take advantage of this extra plate to support the mover sticking out?
Andrea JEREMIE

11. Height compensation + coarse adjustment
Mover T-plate
Base plate
Height compensation + coarse adjustment
Extra support
No possibility of using side of table for attachment
TMC table
Mover base plate
Single base plate
TMC table
TMC table
U-shaped “shelf”
Andrea JEREMIE
Base plate attached with clamps

12. What we need to define How do we attach the movers to the table?
How do we compensate for the 400mm height difference to the beam?
How do we attach the table to the floor?
Not yet defined: use “old” method with coarsely adjustable feet? But at such a height, how is the vibrational behaviour? Need to know how table attached to the floor to know exact compensation value
Andrea JEREMIE

13. What we need to define How do we attach the movers to the table?
How do we compensate for the 400mm height difference to the beam?
How do we attach the table to the floor?
TMC table
Concrete polymer?
Flat steel plate
Floor
Andrea JEREMIE
Bolt plate to floor

14. Rigid mount for Shintake monitor & FF magnets-side view
Andrea JEREMIE
T.Kume

15. Rigid mount for Shintake monitor & FF magnets-top view
Andrea JEREMIE
T.Kume

16. Method for ensuring face contact on floor
Vertical table for mounting interferometer optics
(made of non-magnetic SUS honeycomb core?)
Cover for preventing
LASAR scattering
Horizontal table for mounting vertical table
(made of steel honeycomb core)
Mounting face
Beam
Filler for ensuring face contact
between table and floor
T.Kume
Shim
Floor
Andrea JEREMIE

17. Q-BPM support for FF SX magnets
Height to magnetic center
one SX magnet and
stand is ~279.4mm.
Needs to be 220mm
Height to magnetic center of SX and stand is ~234.5mm, have 2 magnets with these stands.
C.Spencer
Andrea JEREMIE