Beam	  line	  alignment	  status	
2014.	  March.	  4	  Takuya	  Kamitani	  initial alignment strategy	l laser straight of girders in sector-A, B
component alignment by laser trackerl laser straight of girders in sector-C to 5component alignment by laser trackerl J-arc alignment by laser tracker	
2	

at	  KEKB	  Review	  2013	

girder	  straightness	  	  before	  laser	  straight	  alignment	
A,B-­‐sector	

1.0mm	

0.0mm	

3	

aligned in	  laser	  straight	  	  but	  @me	  varia@on

A,B-­‐sector	

0.1mm	

200	  microns	

Ver. ~0.65㎜/V	

JuncJon	120	  m	#2=A1D	Sensor	  posiJon	
横軸：センサー位置	-­‐	  0.1mm	
positionvariation in(9/10～9/16, 2013)	
#2=PD-­‐R001D	

The movement over a week amounted to200 microns or more.	

2013/11/11	T.	  Higo	  SuperKEKB	  WS	4	

Micrometer	  measurement	  setup	  between	  an	  expansion	  joint	Base	  plate	  on	  the	  wall	
Horizontal	  Arm	

JuncJon	
VerJcal	  Arm	Wall	  Micrometer	

Floor	  Relative floor movement
between both sides of expansion joint	1	  day	Electricity	  cut	50	  µm	

Ver@cal	  	  [mm]	

Typical	  example	  of	  ver@cal	  movement:	  between	  C3	  and	  C4	Summaryat 3 junctions	1	  week	[day]	

Daily～20μm(full),	  	  DriM～3.5μm/day	  Item	

@C3, @12,@18	

Hor.
daily	

2～10 [µm]	

Hor.
drift	

2～5 [µm/day]	

Ver.
daily	

15～30 [µm]	

Ver.
drift	

1～5 [µm/day]	

Junction: The daily movement amounts to 20-30 microns,
while weekly to several tens of microns.	
6	girder	  alignmentl completed (σ<0.3mm) in laser straightin sector-A, Bl only pre-alignment in laser straightin sector-C to 2 (still in construction stage)
to be aligned in April 2014 &detail alignment in 2014 summer shutdownl only pre-alignment by laser tracker
in sector-3 to 5 (in operation for PF & PFAR)
detail alignment in laser straightin 2014 summer shutdown	

7		  	  	  	  	  	  	  	  	  short-­‐distance	  (local)	  alignment	 at	  KEKB	  Review	  2013	
Hard ware alignment on a 10m girder6)&!*

2334
"#%

B

B2-H	
0.136	

GH

G&G(

"G%GF

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CDE&CDE(

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$"""'"""+,-./0123456

B

(""""

B)%!*>??@
"#%

B4-H	
G&GF

GHG%

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CDE&CDE(!"#%!"#$

CDEF

CDE%
C

"&"""%"""$"""

789:;<=

DEF$

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G$

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G&'"""("""">??@

GHG'!"#%"$"""'"""(""")"""

89:;<=>*'!+?@@A%""""
?@@A

B4-V	

"#&"#&G("#$!"#$C2334+,-./01A*$!+

0.228	

0.266	,-./01234567

"#&

B2-V	

?@@A
"#&,-./01234567

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5

"#$

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Reference bars (blue) are set typically within 0.1mm.	
Ver < 0.2mm	
Hor. up to 0.5mm slope	

Systematic error may exists in H by 0.5mm, while
V stays 0.2mm from reference bar. 	
K.	  Kakihara,	  22	  Nov.	  2012	  8	Accelerator structure alignment
on a girder, measured w.r.t. PD arms	
Examples	  showing	  the	  present	  status:	  StaJsJcs	  of	  three	  units	  (C1,	  C2,	  C3)	  	  Horizontal	  	  	  	  Average	  =	  2	  microns	  	  	  	  Stand.	  Dev.	  =	  16	  microns	  Easy	  adjustment	  by	  shimming	  	  Ver@cal	  	  	  Average	  =	  5	  microns	  	  	  Stand.	  Dev.	  =	  51	  microns	  A	  li]le	  tedious	  but	  can	  be	  adjusted	  by	  screw	  bolts	
9	

component	  alignmentl completed (σ<0.1mm) for acc. structures in sector-A, Bv for magnets, add-on reflector base for laser tracker tobe installed, to be aligned in 2014 summer shutdownl completed (σ<0.1mm) for acc. structures in sector-C, 1
before targetv for magnets, add-on reflector base for laser tracker tobe installed, to be aligned in 2014 summer shutdownl only rough alignment in 1-3 to 2-6 (still in construction)
to be aligned in 2014 summer shutdownl only pre-alignment by laser tracker
in sector-3 to 5 (in operation for PF & PFAR)
detail alignment in 2014 summer shutdown	

10	J-­‐arc	  reference	  lines	  were	  re-­‐deﬁned	
from	  180	  degree	  wrt	  A-­‐B	  line	  	  to	  symmetric	  wrt	  A-­‐B,	  C-­‐5	  lines	

from	  geoid	  surface	  to	  the	  linac	  common	  plane	B	  -­‐	  A	𝛽	90−𝛽	𝜸  𝒎𝒓𝒂𝒅	

15000	  mm	  	  	  	  	  	  	  	  	  	  +	  d	  mm	90−𝛽	C	  -­‐	  1	𝛼	Horizontal
Both lines α/2 from parallel lines
α = 0.114 mrad 	

Arc	C	  -­‐	  1	B	  -­‐	  A	Vertical
Inclination set along A-B
Close to C-5 line
γ ~ 0.049 mrad	
data	  from	  M.	  Tanaka	

11	j-­‐arc	  components	  posiJon	  adjustment	
horizontal	

ver@cal	[1	  mm]	  2013/11/11	

12	J-­‐arc	  alignmentl once completed (σ<0.05mm),
however systematic error by laser tracker found inhorizontal plane, (seems to be OK for vertical)
after the magnet position adjustmentl the error in position can amount to 1mml need re-adjustment,
to be performed in 2014 summer shutdown	

13