1. Status of ATF/ATF2 and machine schedule in this fall
Impact of the earthquake
Recovery status, alignment
Schedule in this fall
N. Terunuma, KEK

2. Rough Alignment (LINAC)
Recovery History for Test Beam
Mar 11 14 21 28
Apr 4 18 25
May 2 9 16 23 30
Jun 6 13 20 27
Jul
KEK MW
1.7
2 / 5 MW (day/night)
24 MW
Blackout
½ power
Power line recovery
ATF Shield
ATF2 Shield
Radiation Safety
Test Beam
KEK
Requested
Standby
at Home
Summer Shutdown
Power
Distri-bution
Cooling Water
Vacuum RF
Rough Alignment (LINAC)
(BT)
(DR)

3. Impact of the earthquake on ATF
Photo: 2011/March/11 15:55

4. Main Power Lines
Recovered in April

5. ATF LINAC All were repaired in March!
QM2L table was backed to the original.
Chambers were exchanged.
QD10L bellows was exchanged.
All were repaired in March!

6. ATF LINAC Klystrons
Repaired in April.

7. Beam Transport Repaired in April. Fallen Pb blocks were cleared.
Ceramic of the CT monitor and a bellows were exchanged.
Repaired in April.

8. Damping Ring
Repaired in April/May

9. ATF2 beam line Magnet Mover Dust on the IP-BSM Optics
Repositioning
Dust on the IP-BSM Optics
Outside of ATF2 end
Dust on the FD mover
10 cm slide

10. ATF2 FD/IP shield works: re-positioning
Big work! 3 weeks

11. ATF2 FD-IP area
Recovered in May

12. Checkout of Electricity and Water in May
Cooling Water pipes
DR magnet PW station, 6.6kV

13. A test beam passes all beamline
Single bunch, 0.78 Hz, 0.3 x 1010 e/bunch DR&ATF2
6/3 MSPIP
6/3 MS1FF
6/2 MS1X
6/3 MS2FF
5/27 BT end
6/2
DR storage
5/31
DR 1st turn
2011/5/25
Injector
2011/5/26
LINAC
2011/06/03
N.Terunuma

14. Stored beam in DR (x1010 e/bunch) A stored beam was delivered to the dump of ATF2. No critical damage on the accelerator was found.
3 trains
3 trains
1.0x1010
XSR ready
Inspection of the radiation safety
FONT
V-emittance (XSR) ~30pm
Freq. Adjust
0.5x1010
Compton
2-mirror
FFTB mover
HAPS
Cavity BPMs
6/1
6/3
6/8
6/10
6/13
6/17
6/24
6/30
DR rough alignment for checkout was continued in daytime.

15. Welcome back from oversea
17 persons
May - August

16. Alignment of the beamline - continued work -

17. Status of Alignment
All in the ATF building was shaken (10 cm or more?) by Great East Japan Earthquake.
ATF2: Just surveyed. Waiting the alignment work in October.
DR: North-South was longer than the design about 1.5 mm.
Is it caused by earthquake?
 made new optics to minimize the alignment
Linac/BT
Lift up the downstream section close to the BT/DR level. It will improve the difficulty of the injection.

18. Alignment: LINAC/BT level
comments
Re-aligned Cavity
Re-aligned LINAC Table
Measured after earthquake
BT was re-aligned but plots were not yet prepared.
LINAC’s drop to end and jump to BT had been known since the DR startup. It might be caused by the DR construction after LINAC alignment. It brought a troublesome tuning to us. We corrected these by using a long shutdown for power-recovering after the earthquake.

19. DR displacement (Enlarged image)
after earthquake
Rough alignment in May
1.5 mm wider(N-S) than the original design. When??
New design was defined as wider but same circumference.

20. Alignment: DR level Vertical (mm) aligned in June, aligned in summer
0.5
Target: |x|< 90 um
0.0
Vertical (mm)
-0.5
East Arc is under realignment.
North
West Arc
South
-1.0

21. Alignment: DR Horizontal (mm) Longitudinal (mm) aligned in summer
Others aligned in May
1.0
0.5
Target: |x|< 90 um
Horizontal (mm)
0.0
-0.5
North
West Arc
South
East Arc is under realignment.
1.0
0.5
Longitudinal (mm)
0.0
-0.5
-1.0

22. Waiting for alignment: ATF2
Level of the EXT-ATF2 magnets
Floor of ATF2 sank about 1.5 mm.
0.0
Target: mm
-1.0
QF1 mover is ON
Vertical (mm)
-2.0
QD0 mover is OFF
FFTB movers are “zero” position.
EXT FF
-3.0

23. ATF2 Q-magnet Setup Q magnet (KEK,SLAC,IHEP) QBPM (Cavity BPM)
(KEK,PAL)
FFTB mover
(SLAC)
QBPM electronics
(SLAC)
(2008/6)
Concrete Base Stand (KEK)

24. Waiting for alignment: ATF2
Horizontal
Longitudinal
(mm)
(mm)
1.0
Target: mm
0.0
0.0
-1.0
-1.0
-2.0
-3.0
-2.0
Datum on floor
-4.0
-3.0
EXT FF
EXT FF
We are checking the definition of the datum on the floor used at the ATF2 construction. Offset?

25. Waiting for alignment: ATF2
Roll of magnets (mrad)
1.0
- 1.0
EXT
Target: mrad
Pitch (mrad) FF

26. Schedule (draft for discussion)
Sep.26
Oct. 3 10 17 24 31
Nov. 7 14 21 28
Dec. 5 12 19 26
Beam
Alignment
ATF2 &TB
meeting DR
DR survey
survey
survey
EXT-FF
Checkout of beam instruments
Low emittance,
Compton and Others
ATF
R&D
Recovery of
10 pm (DR)
ATF2
R&D
extraction
Recovery of
300 nm
Goal-1 and others

27. 2012 Schedule (draft for discussion)
Jan. 2 9 16 23 30
Feb 6 13 20 27
Mar.5 12 19 26
Apr
May 7 14 21 28
Jun 4 11 18 25
GDE meeting?
JPS meeting
Summer Shutdown
New IP-BPM installation at IP
Low emittance,
Compton and Others
Goal-1? and others
Goal-2? and others

28. Additional slides

29. New Pol e+ system will be installed in this fall (DR)
Upgrade of the 2-mirror system to 4-mirror system is underway. (Hiroshima, KEK)
Old 2-mirror system in DR was replaced with a dummy chamber in August.
New 4-mirror system is under testing beside the beamline.
Installation will be done in the maintenance week after the full checkout of the optical system. It will be in October or later.

30. Alignment: DR all B Q Sx Horizontal Longitudinal
After earthquake, aligned in June, aligned in summer
Horizontal
Longitudinal
all
- 2.0 mm
+2.0 mm
- 2.0 mm
+2.0 mm B Q Sx