Status of ATF/ATF2 and machine schedule in this fall

• Impact of the earthquake• Recovery status, alignment• Schedule in this fall

N. Terunuma, KEK

Recovery History for Test BeamMar11 14 21 28

Apr4 11 18 25

May2 9 16 23 30

Jun6 13 20 27

Jul4

KEK MW 1.7 2 / 5 MW (day/night) 24 MW 20

Power line recovery

Rough Alignment (LINAC)

RF

Blackout ½ power

Vacuum

ATF2 Shield

Cooling Water

(BT) (DR)

Su

mm

er S

hu

tdo

wn

Test BeamKEKRequested Standbyat Home Power

Distri-bution

ATF Shield

Rad

iati

on

Saf

ety

Impact of the earthquake on ATF

Photo: 2011/March/11 15:55

Main Power Lines

Recovered in April

ATF LINACQM2L table was backed to the original.Chambers were exchanged.

QD10L bellows was exchanged.

All were repaired in March!

ATF LINAC Klystrons

Repaired in April.

Beam TransportFallen Pb blocks were cleared.Ceramic of the CT monitor and a bellows were exchanged.

Repaired in April.

Damping Ring

Repaired in April/May

ATF2 beam line

Repositioning Dust on the IP-BSM Optics

Dust on the FD mover

Magnet Mover

Outside of ATF2 end

10 cm slide

ATF2 FD/IP shield works: re-positioning

Big work! 3 weeks

ATF2 FD-IP area

Recovered in May

Checkout of Electricity and Water in May

DR magnet PW station, 6.6kV Cooling Water pipes

A test beam passes all beamline

2011/5/25Injector

2011/5/26LINAC

5/31DR 1st turn

Single bunch, 0.78 Hz, 0.3 x 1010 e/bunch DR&ATF2

5/27 BT end

6/2DR storage

6/2 MS1X6/3 MS1FF6/3 MS2FF

6/3 MSPIP

2011/06/03 N.Terunuma

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.

6/1 6/3 6/8 6/10 6/13 6/17 6/24 6/30

0.5x1010

1.0x1010

3 trains

XSR

read

y

Compton2-mirror

FON

T

3 trains

Cavity BPMsFFTB moverHAPS

Freq. A

djust

V-emittance

(XSR

) ~30pm

DR rough alignment for checkout was continued in daytime.

Insp

ectio

n of

the

radi

ation

saf

ety

Welcome back from oversea

17 personsMay - August

Alignment of the beamline- continued work -

Status of AlignmentAll in the ATF building was shaken (10 cm or more?) by Great East Japan Earthquake.

Linac/BT • Lift up the downstream section close to the BT/DR level. It will reduce the

workload of DR tuning.

DR• ¾ of DR has been re-aligned.

East arc will be done in this week.• Expanded North-South about 1.5

mm Rematch the optics

ATF2: Just surveyed. Waiting the alignment work in October.

Alignment: LINAC/BT levelcomments

Measured after earthquake

Re-aligned LINAC TableRe-aligned Cavity

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 power-recovering long shutdown after the earthquake.

BT was re-aligned but plots were not yet prepared.

DR displacement (Enlarged image)

after earthquakeRough alignment in May

• 1.5 mm wider(N-S) than the original design. When??

• New design was defined as wider but same circumference.

Alignment: DR levelaligned in June, aligned in summer

Verti

cal (

mm

)

-0.5

0.0

-1.0

0.5

North West Arc South

East Arc is under realignment.

Target: |x|< 90 um

Alignment: DR

Hor

izont

al (m

m)

-0.5

0.0

1.0

0.5

Long

itudi

nal (

mm

)

-0.5

0.0

-1.0

1.0

0.5

aligned in summerOthers aligned in May

North West Arc

South East Arc is under realignment.

Target: |x|< 90 um

Waiting for alignment: ATF2

Floor of ATF2 sank about 1.5 mm.

Level of the EXT-ATF2 magnets

EXT FF

Verti

cal (

mm

)

QD0 mover is OFF

QF1 mover is ON

FFTB movers are “zero” position.

Target: +-0.1 mm

-1.0

0.0

-2.0

-3.0

ATF2 Q-magnet Setup

Concrete Base Stand (KEK)

FFTB mover

(SLAC)

QBPM

(Cavity BPM)

(KEK,PAL)

Q magnet (KEK,SLAC,IHEP)

QBPM electronics

(SLAC)

(2008/6)

Waiting for alignment: ATF2

Horizontal

EXT FF

Target: +-0.1 mm

-1.0

0.0

-2.0

-3.0

0.0

-1.0

-2.0

-3.0

-4.0

1.0(mm)(mm) Longitudinal

EXT FF

Datum on floor

We are checking the definition of the datum on the floor used at the ATF2 construction. Offset?

Waiting for alignment: ATF2

Roll of magnets (mrad)1.0

- 1.0

0

EXT

Target: +-0.1 mrad

Pitch (mrad)1.0

- 1.0FF

Schedule (draft for discussion)Sep.26

Oct.3 10 17 24 31

Nov.7 14 21 28

Dec.5 12 19 26

Beam

DR

Checkout of beam instruments

EXT-FF

Low emittance,Compton and Others

ATFR&D

ATF2R&D

Alignment

DR survey

ATF2 &TBmeeting

Recovery of 10 pm (DR)

Recovery of 300 nm Goal-1 and others

extraction

survey survey

2012 Schedule (draft for discussion)2012Jan.2 9 16 23 30

Feb6 13 20 27

Mar.5 12 19 26

Apr2 9 16 23 30

May7 14 21 28

Jun4 11 18 25

New

IP

-BP

M i

nst

alla

tio

n a

t IP

Low emittance,Compton and Others

Goal-1? and others Goal-2? and others

Su

mm

er S

hu

tdo

wn

GD

E m

eeti

ng

?JP

S m

eeti

ng

Additional slides

Alignment: DRAfter earthquake, aligned in June, aligned in summer

- 2.0 mm

+2.0 mm

Horizontal Longitudinal

all

B

Q

Sx

- 2.0 mm

+2.0 mm

Hardware updates 1/?Pol e+ Compton: 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.