Existing ATF extraction line plus final focus optics

1
Existing ATF extraction line plus final focus
optics

• November 30, 2004

2
Blue dashed- existing extraction line Red new
final focus
version from Shigeru Kuroda
3
Existing ATF extraction line (converted from SAD
to MAD by Mauro Pivi) Note a need to include
sextupole errors in bends (M.Woodley)
4
Extraction FF FF optics with IP bx,y
13.5,0.1mm, hx 0.072 rad, L2m.
5

• Bandwidth, etc., shown on the next slides
  obtained with MAD and tracking done with TURTLE
• The FF optics was optimized with SAD
• There maybe some differences between these codes
  (to be checked!), so, the bandwidth results are
  preliminary!
• Mauro Pivi and Toshiyuki Okugi are working on
  cross check with SAD

6
Original existing extraction line FF
7
2nd order dispersion zeroed y-chromaticity
minimized at the exit of extraction line (see
further below)
8
Bandwidth obtained by TURTLE tracking of
(extractionFF) when 2nd order dispersion
y-chrom. zeroed at the exit of extraction line
Note again, that there may be difference of
tracking with Turtle and SAD, and possibly that
tracking with SAD will show better bandwidth.
Need to check this !
9
Blue dashed- existing extraction line Red new
final focus
another possible version
10
Existing extraction line
Final bend is not used
11
2nd order dispersion in the existing extraction
line
2nd order dispersion zeroed y-chromaticity
minimized at the exit of extraction line with
three sextupoles (marked with red)
12
Existing extraction FF FF optics with IP bx,y
4,0.1mm, hx 0.14 rad, L1m.
13
(No Transcript)
14
Bandwidth of (extractionff) obtained by TURTLE
tracking
Note that extraction line apertures were
increased. Extraction line probably would not
pass the beam with 1 without losses (due to
large dispersion).
15
Optics status

• Two versions of FF optics were combined with
  existing extraction line optics
• Two more versions need to be produced
• extraction line going to GLCTA are FF

16
just a possible name