1. Final Focus Optics Test at ATF
Shigeru KURODA

2. Goal Test of the Local  Correction Optics
Experience of Construction & Tuning FF system
Test of LC FF Instrumentation
e.g. nanoBPM
Beam Jitter control at nanometer level by active mover, kick, measuring the beam position at nanometer level nanoBPM at IP
Optional Laser facility

3. Merit High quality ATF DR beam is available. E=1.54 GeV x=3×10-6 m
x:y=100:1
=0.1% Gaussian Beam

4. Optics & Geometry *x=10mm  *y=0.1mm :Similar to LC FF
Length:s=36.6 m :construction in the hall is possible

5. Performance Tracking with 1000 particles
x=1e-9 m, y=1e-11 m
→ x =3.76m  y =35 .

6. Local Correction Same order of  cancelled locally
(GLC magnets are divided into two parts→two adjacent piles shows the same magnets)

7. Vibration Tolerance Similar difficulty to stabilize the beam ? ATF2
GLC/NLC
DRIFT L
30mm
34mm
BEND
K0/K0
9.5E-6
8.7E-5 
8mrad
QUAD
K1/K1
4e-5 x
0.9mm y
0.09mm
0.04mrad
SEXT
K2/K2
3e-3
0.3mm
0.4mrad
Similar difficulty to stabilize the beam ?

8. Alignment Tolerance Correction=Correction1 + 5x Correction2
3x(Orbit distortion corr.)
Final Q mover dz ( 50 m step )
SX mover dx dy ( 10 m step )
Correction2
3x(Orbit+dispersion distortion Corr.)
The alignment tolerance is achievable

9. Summary ATF2 can be a good test facility for the LC FF. To be done
To fill the boxes in the vibration tolerance
Simulation for the alignment tolerance
Investigation of the ATF DR beam stability for the test of instrumentation at ATF2
Study of fast feedback at ATF2
Study of utilizing the small size beam