spring-8 (1436 m) since 1997
DESCRIPTION
Installation and Alignment of RIKEN-XFEL at SPring-8. SPring-8 (1436 m) since 1997. XFEL (700 m) From 2011. BL29XUL From 2000. Hiroaki Kimura 1,3 ) , Masafumi Yamashita 2 ) , Yusuke Maeda 2 ) , Yoshifumi Tsukamoto 2 ) , Noriyoshi Azumi 1 ) , Sakuo Matsui 1 ) , Noritaka Kumagai 1 ). - PowerPoint PPT PresentationTRANSCRIPT
SPring-8 (1436 m) since 1997
XFEL (700 m)From 2011
Hiroaki Kimura1,3 ) , Masafumi Yamashita2 ) , Yusuke Maeda2 ) , Yoshifumi Tsukamoto2 ) , Noriyoshi Azumi1 ) , Sakuo Matsui1 ) , Noritaka Kumagai1 )
Installation and Alignment of Installation and Alignment of RIKEN-XFEL at SPring-8RIKEN-XFEL at SPring-8
1)RIKEN/SPring-8, 2)SPring-8 Service Co., Ltd. 3)JASRI/SPring-8
BL29XULFrom 2000
Outline
1. Overview of our XFEL2. Strategy of alignment 3. Vertical direction measurement4. Horizontal direction measurement5. Alignment of C-, S- band accelerator Section6. Summary
2
RIKEN’s XFEL: SPring-8 Compact SASE Source (SCSS) Concept
Short Period Undulator Lower Beam Energy
In-Vacuum Undulator : u= 18 mm, K=1.9, x < 1 Å E= 8 GeV,
8 GeV, C-band 35 MV/m 230 m
Short Accelerator LengthHigh Gradient Accelerator
Accelerator length of 400 m
EmbankmentWeathering bedrock
BedrockReplacement by excavation with crusher stone
33
Concrete pillar Diameter: 1.5 or 1.6m Total :139 Length :19-52m (Ave. 30m) Subsidence ~ 2 0mm/10years
Bedrock or Replacement with crusher stone.
Subsidence < 2mm/10years
Schematic view of XFEL
Mar. 2009: Building completedApr. 2009: Installation startedOct. 2010: Aging of accelerator startsFeb. 2011: Beam commissioning starts
Our situations under the alignment work1. Requested Accuracy of V&H directions
4
Accelerator Sec.: ±0.1mm(BPM, Q-Mag), ±0.15mm(Accel. Str.) , Smooth/400m
Light Source Sec. : ±0.1mm/110m(Undulator Sec.)
Final goal : 30μm/110m and 5μm/12m at Undulator Section
→ X-ray Based Alignment and Beam Based Alignment
2. The period for installation & alignment work is 18 months.
3. Displacement of the floor is not small. ~ 2mm/year
4. 1 time / 1 ~ 2 months Survey is needed. → Half week for the entire survey, Compact survey network
Girders of Undulators and Q&BPMs are equipped remote positioning system.
Strategy of Alignment
Survey of Monuments
5
Vertical direction: Digital Level
Horizontal direction: Survey Network
Entirety:
Undulator Hall:
・ Reference monuments were mounted at intervals of about 30m as a beam line reference for alignment at 700mm horizontal off-set position.
Total: 32, Accel. Tunnel:14, U. Hall for BL3:9 for BL1: 9
・ Accelerator components and stone tables were aligned using a laser tracker, its coordinate system was made from two nearby monuments and an inner level.
By total station using only monuments that queues up straight
It takes 3 days to survey for all monuments.
By laser tracker using monuments of BL3, BL1, and additional points on the Wall
→ Permanent monuments have the advantage that the alignment work is started at once in an arbitrary place and a measurement accuracy improvement.
(Beam direction: Distance Meter)
Instrumentation
・ Laser Tracker: API T3 & OT
・ Digital Level: Trimble DiNi 0.3
・ Total Station: Leica TDA 5005
・ Optical Plummets: Leica NL
・ Distance Meter: Kern ME5000
・ Optical Level: Wild N3, Nikon AS-2
・ Laser Range Meter: HILTI PD32
・ Multi-Directional Lasers: TaJIma AL-KYRJ
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Base level line of XFEL
400m200m
Height Difference -0.81mm ~
30m
16μrad
Def. Angle @Switching Mag. 20μrad
Deflecting angle~ 5 μrad
Geoid levelStraight lineStraight line
Accelerator Sec.Undulator Sec.FE & Exp.
Monument
Laser Tracker,TDA 5005
Optical level
ME5000
Digital Level
・ Accel. Tunnel:14, U. Hall for BL3:9 for BL1: 9
・ Reference point: Center of 1.5 inch ball on the target plate
・ Horizontal position could be moved on the floor by using a plummet.
Vertical Direction
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History of Floor subsidence from Aug. 2008
By Digital Level
Accelerator Building Area The shape of the subsidence data is very similar to that of embankment. It is as same as the case of BL29XUL(not pillar structure) Recent subsidence 0.15mm/month @ Z= 200m (BL29XUL 8mm/year@BL29XUL )
Light Source Building Area Recent subsidence is small.
Subsidence of top surface of concrete pillar
Observed subsidence is agree with that of floor.
9Bedrock
Embankment
Vertical Direction By Digital Level
10
History of Floor subsidence from Aug. 2008
Difference of Monument from ideal line
Reference point
+1mm +2mm +1mm
Adjusted before installation
Difference of monument position is within 1mm.
Horizontal direction: Survey network
・ by TS using ATR
Entirety (640m)
Light Source Building (240m)
・ 23 control points only monuments that queues up straight.・ 4 measuring positions
・ Accuracy of ATR:1”
→ Estimated error of network: ± 0.5mm
・ 28 control points ・ Monuments for BL3: 9 ・ Monuments for BL1: 9 ・ Additional points on the Wall :10 size: 240m × 8 m・ 9 measuring positions
・ by Laser Tracker
・ Accuracy of LT :1”, 20μm+0.2ppm
→ Estimated error of network: ±0.2mm
Measuring Position Control Point
BL3
BL1
IDIDIDIDIDID
Horizontal Direction By Total StationSurvey network
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Difference of Monument from ideal line
Accelerator BuildingLight Source Building
We defined two fixed points. Building curves, swells with the south.
South
North
Entirety consists of three straight line.
-10 ~ +15 mm /7years@BL29XUL
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We defined two fixed points at both side of Und. section.
Difference of monument position in Undulator section is within 0.1mm in both directions.
Displacement at Light Source Building
Undulator-Section
Vertical
Horizontal
Digital level data (res. 10μm) is good agreement with HLS data(res. 0.1μm ) .
By Digital Level
By LT survey network
Alignment of Accelerating Structure
14
Using the digital level and the total station
Fiducials
Adjustment Unit
Alignment Unit
CCR
Using the laser tracker
C & S-band accelerator section ( ~ 400m) 136 accelerating structures 24 stone tables for Q-magnet and BPM.
Check of Alignment
15
Most part is aligned smoothly.
Position of Accelerator Components
Diff
eren
ce(m
m)
Diff
eren
ce(m
m)
C-band C-band S-band
Vertical
Horizontal
・ There are some jump at several parts.
Strategy of alignment: We adopted permanent monuments and compact survey network.
Summary
Acknowledgements・ IHI Inspection & Instrumentation Co., ltd.・ Pasco Corp., especially Dr. Mishima
Difference of reference monuments from ideal line: At Accelerator building: Vertical: 1mm Horizonta: 2mm At Light Source building: 0.2mm, 0.1mm in ID section
Displacement of floor: It was within our expectation. → It is important to know the history of the ground displacement for the new facility. We should take care of the displacement of floor in the future
Alignment of components: Most component is good. Some smoothing is needed before beam commissioning in next February.
Displacement of BL29XUL in 7years @IWAA2008
-60.0
-50.0
-40.0
-30.0
-20.0
-10.0
0.0
10.0
0 10 20 30 40 50 60
-20.0
-10.0
0.0
10.0
20.0
0 10 20 30 40 50 60
Vac. Sta.#
Alt
i.(m
)
50m
Top ViewSideView
Original Altitude Line
Level(
mm
)La
tera
l(m
m) North
South
Vac. Sta.#
Level: Subsidence at #51: 54mm (8mm / year)Lateral: Displacement : ~ - 5 ~ +15mm 17
→ Accelerator section of XFEL building (located at #35 - #64)
Ground displacement depends on that of embankment.
: GNSS others :TS