1. ATF2 Layout/Optics (v3.6) Existing ATF Extraction Line
Coupling Correction /
Emittance Diagnostics
FONT
nBPM (KEK)
nBPM (SLAC)
Compton / laserwire
Existing ATF Extraction Line
ODR
Mark Woodley, SLAC
3rd ATF2 Project Meeting, December 18-20, 2006

2. 3rd ATF2 Project Meeting, December 18-20, 2006
Mark Woodley, SLAC
3rd ATF2 Project Meeting, December 18-20, 2006

3. 3rd ATF2 Project Meeting, December 18-20, 2006
Version 3.6 Changes
Andrei’s latest FF optics with reduced U3224
EXT skew quadrupoles for vertical dispersion correction
octupoles will be removed
Cherrill’s latest designs for FF magnets (coming soon)
and other things that come out of this meeting …
Tracking Results
Program σy*(rms) σy*(sig) εy Δεy
nm nm nm %
MAD
ELEGANT
TURTLE
DIMAD
LUCRETIA
SAD
Mark Woodley, SLAC
3rd ATF2 Project Meeting, December 18-20, 2006

4. 3rd ATF2 Project Meeting, December 18-20, 2006K2
BH3
BH2
6.0 m
BH1
septa K1
BH1,2 (SHI “H”) strengths same as existing EXT
BH3 (SHI “C”) has 110% of present strength
Mark Woodley, SLAC
3rd ATF2 Project Meeting, December 18-20, 2006

5. 3rd ATF2 Project Meeting, December 18-20, 2006
K1(+)
K2(+)
possible location for
1 μm laserwire
σy = 1.4 μm
Mark Woodley, SLAC
3rd ATF2 Project Meeting, December 18-20, 2006

6. 3rd ATF2 Project Meeting, December 18-20, 2006
EXT Diagnostic Section (v3.6) SQ SQ SQ SQ WS WS WS WS WS
0.5
2.7
1.25
1.25
0.8
0.8
0.8
0.8
1.25
2.2
1.25
3.8
3.8
3.8
– x
– y
90°
180°
90°
90°
11°
17°
28°
42°
28°
σ (μm)
80.6
10.0
154.6
6.8
86.3
12.1
152.3
6.8
87.4
11.7
shield
wall
8 < σx/σy < 23
Mark Woodley, SLAC
3rd ATF2 Project Meeting, December 18-20, 2006

7. 3rd ATF2 Project Meeting, December 18-20, 2006
Mark Woodley, SLAC
3rd ATF2 Project Meeting, December 18-20, 2006

8. 3rd ATF2 Project Meeting, December 18-20, 2006
Mark Woodley, SLAC
3rd ATF2 Project Meeting, December 18-20, 2006

9. 3rd ATF2 Project Meeting, December 18-20, 2006
Mark Woodley, SLAC
3rd ATF2 Project Meeting, December 18-20, 2006

10. 3rd ATF2 Project Meeting, December 18-20, 2006
2nd order dispersion
Mark Woodley, SLAC
3rd ATF2 Project Meeting, December 18-20, 2006

11. 3rd ATF2 Project Meeting, December 18-20, 2006
chromaticity (EXT)
Mark Woodley, SLAC
3rd ATF2 Project Meeting, December 18-20, 2006

12. 3rd ATF2 Project Meeting, December 18-20, 2006
beam size (μm)
Parameters
energy = 1.3 GeV
γεx = 5×10-6 m
εx = 2×10-9 m
γεy = 3×10-8 m
εy = 1×10-11 m
σz = 8 mm
σδ = 0.08 %
βx* = 4 mm
βy* = 0.1 mm
σx* = μm
σy* = 34 nm
Mark Woodley, SLAC
3rd ATF2 Project Meeting, December 18-20, 2006

13. 3rd ATF2 Project Meeting, December 18-20, 2006
TABLE 1: existing ATF EXT quadrupoles
power supply maximum currents from N. Terunuma (April 22, 2005)
a note on names: the "quad name" column names the location in the beam line;
the "magnet name" column names the physical magnet that presently resides at
each location; the "power supply" column names the power supply whose cables
come to that location
quad magnet magnet power Imax KLmax notes
name name type supply p.s. @ 1.3 GeV
QD1X QD1Xmag Hitachi 2 QD1Xps
QD2X QD2Xmag Hitachi 2 QD2Xps
QF1X QF1Xmag Hitachi 2 QF1Xps
QK0X QK0Xmag ECUBE skew QK0Xps e-4
QS1X QS1Xmag ECUBE skew QS1Xps e-4
QF2X QF2Xmag Hitachi 1 QF2Xps
QD3X QD3Xmag Hitachi 5 QD3Xps
QF3X QF3Xmag Hitachi 5 QF3Xps
QF4X QF4Xmag Hitachi 5 QF4Xps
QS2X QS2Xmag ECUBE skew QS2Xps e-4
QD4X QD4Xmag Hitachi 5 QD4Xps use Imax = 100 amps
QD5X QD5Xmag Hitachi 5 QD5Xps
BH4X
QF5X QF5Xmag Hitachi 5 QF5Xps
QK1X QK1Xmag IDX skew QK1Xps e-2
QD6X QD6Xmag Tokin QD6Xps
QK2X QK2Xmag IDX skew QK2Xps e-2
QD7X QD7Xmag Hitachi 5 QD7Xps
QK3X QK3Xmag IDX skew QK3Xps e-2
QF6X QF6Xmag Hitachi 5 QF6Xps
QK4X QK4Xmag IDX skew QK4Xps e-2
QD8X QD8Xmag Hitachi 4 QD8Xps
QF7X QF7Xmag Hitachi 4 QF7Xps
QD9X QD9Xmag Hitachi in series with QD8X
magnetic measurements data file Imax
ATF$MAG:MAG_KI_Q_HITACHI_1.FOR
ATF$MAG:MAG_KI_Q_HITACHI_2.FOR
ATF$MAG:MAG_KI_Q_HITACHI_4.FOR
ATF$MAG:MAG_KI_Q_HITACHI_5.FOR
ATF$MAG:MAG_KI_Q_TOKIN_3393.FOR
ATF$MAG:MAG_KI_Q_IDX_SKEW.FOR
ATF$MAG:MAG_KI_Q_ECUBE_SKEW
Mark Woodley, SLAC
3rd ATF2 Project Meeting, December 18-20, 2006

14. 3rd ATF2 Project Meeting, December 18-20, 2006
TABLE 2: ATF2 EXT quadrupoles and sextupoles (“version 3.6")
name magnet magnet power Imax KLmax KL NOTEs
name type supply p.s.
SF1X S FFTB sextupole
QF1X QD3Xmag Hitachi 5 QD3Xps
QS1X e new magnet?
QD2X QF3Xmag Hitachi 5 QF3Xps
SD2X S FFTB sextupole
QF3X QF4Xmag Hitachi 5 QF4Xps
QF4X QD4Xmag Hitachi 5 QD4Xps
SD3X S FFTB sextupole
QD5X QD5Xmag Hitachi 5 QD5Xps
QS2X e new magnet?
QF6X QF5Xmag Hitachi 5 QF5Xps
SF4X S FFTB sextupole
QF7X QD1Xmag Hitachi 2 QD1Xps
QD8X QD7Xmag Hitachi 5 QD7Xps
QF9X QF6Xmag Hitachi 5 QF6Xps
QK1X QD6Xmag Tokin QD6Xps convert old QD6X?
QD10X IHEP
QF11X IHEP
QK2X QK2Xmag IDX skew QK2Xps e
QD12X IHEP
QF13X QD8Xmag Hitachi 4 QD8Xps
QD14X QF7Xmag Hitachi 4 QF7Xps
QF15X QD9Xmag Hitachi in series with QF13X
QK3X QK3Xmag IDX skew QK3Xps e
QD16X IHEP
QF17X IHEP
QK4X QK4Xmag IDX skew QK4Xps e
QD18X IHEP
QF19X IHEP
QD20X QD2Xmag Hitachi 2 QD2Xps
QF21X QF1Xmag Hitachi 2 QF1Xps
note: QF2X (Hitachi 1) and one IHEP quadrupole are left over
Mark Woodley, SLAC
3rd ATF2 Project Meeting, December 18-20, 2006

15. 3rd ATF2 Project Meeting, December 18-20, 2006
Version 3.6 Issues
BH3 (Sumitomo Heavy Industries type “C”) … can it run at 110% of it’s present strength?
need to get another FFTB “1.38S3.00” sextupole from SLAC for EXT
cavity BPMs on EXT quads with no movers (QD18X, QF19X, QD20X, QF21X)?
kicker cables (kickers are 8.2 m / 35 ns further apart)
compact laserwire package design (laserwire chamber + wire scanner + BPM(s))
where to put: KEK BPM triplet, nanoBPM, FONT4, ODR, … ?
MAD deck for FF is still sketchy … need to put in BPMs, movers, etc.
need to do more misalignment/correction and performance simulations (including realistic wire scanner resolutions, extraction channel errors, … )
Mark Woodley, SLAC
3rd ATF2 Project Meeting, December 18-20, 2006

16. 3rd ATF2 Project Meeting, December 18-20, 2006
Version 3.6 Deck Issues
differences between MAD and SAD
“split bend disease”
SURVEY (layout) differences … which coordinates to use for initial magnet alignment? (differences at the few hundred micrometer level … )
earth’s curvature following or laser straight? (vertical difference is same order as alignment tolerances)
differences in tracking results (probably not significant)
different decks (or LINE definitions) for different purposes? (i.e. a special SURVEY deck, a special tracking deck, … )
other issues?
Mark Woodley, SLAC
3rd ATF2 Project Meeting, December 18-20, 2006

17. 3rd ATF2 Project Meeting, December 18-20, 2006
Mark Woodley, SLAC
3rd ATF2 Project Meeting, December 18-20, 2006