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LCLS LCLS-II Survey & Alignment. International Review for PAL-XFEL Survey & Alignment May 31, 2011 Catherine LeCocq SLAC Metrology Department. SLAC Site. From John Galayda LCLS-II DOE CD-1 Review April 26, 2011. A Five Step Process. Planning Information gathering

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LCLS LCLS-II Survey & Alignment

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Lcls lcls ii survey alignment

LCLS LCLS-II Survey & Alignment

International Review for PAL-XFEL Survey & Alignment

May 31, 2011

Catherine LeCocq

SLAC Metrology Department


Slac site

SLAC Site


Lcls lcls ii survey alignment

From John Galayda

LCLS-II DOE CD-1 Review

April 26, 2011

LCLS LCLS-II Survey & Alignment

Pohang Accelerator Laboratory, 05-31-2011


A five step process

A Five Step Process

  • Planning

    • Information gathering

      - Physics requirements

      - Engineering interfaces

      - Geodetic aspects

    • Simulation

  • Monument Network

  • Component Fiducialization

  • Installation

    • Girder Alignment (if applicable)

    • Component Alignment

    • Mapping

  • Operation Phase

    • Monitoring (if applicable)

    • Mapping and re-alignment

LCLS LCLS-II Survey & Alignment

Pohang Accelerator Laboratory, 05-31-2011


Slac instrumentation

SLAC Instrumentation

  • Primary Instrumentation:

    • Automatic Levels: Leica DNA03

    • Laser Trackers: FARO Xi (Leica AT401 to be acquired for LCLS-II)

    • In-house portable wire system

  • Accessories:

    • Bar code rods: 2 meters and 0.6 meters long

    • Tripods: Brunson heavy stands, Kara portable tooling stands

    • Survey targets: 1 ½” Corner Cube Reflectors (12 per laser tracker)

    • Field Data Collectors: Paravant and Allegro 

  • Additional Equipment:

    • Total Stations: Leica TC2002 and TDA5005

    • FARO platinum portable arms (4ft, 8ft, 12ft)

    • Gyrotheodolites: GYROMAT 2000

    • Optical Plummet: Wild NL

    • GPS Receivers: Leica SR-530

    • Laser Scanner: Z+F Imager 5006

LCLS LCLS-II Survey & Alignment

Pohang Accelerator Laboratory, 05-31-2011


Software model

Software Model

  • Parametric Model

    • l = observation vector

    • x = unknown (or parameter) vector

  • Stochastic Model

    • = variance-covariance matrix

    • = variance factor

  • Least Square Solution

  • Free Net Solution

LCLS LCLS-II Survey & Alignment

Pohang Accelerator Laboratory, 05-31-2011


Lcls i uh network simulation

LCLS-I UH Network Simulation

  • Tunnel dimensions: 130 m long, 5 m wide and 2 m high

  • Floor is 1.0 m below beamline, wall monuments are 0.75 m above beamline, laser tracker set-ups are 0.4 m and 0.6 m above beamline

  • 49 Points – 17 Laser Tracker Set-ups

  • sD = 30 μm sh = 30 μm / D sv =50 μm /D sdh = 50 μm

  • W23

    sz = 22 μm sx = 47 μm sy =46 μm

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011


    Lcls i single total station set up

    Single TC2002 Set-up

    sD = 100 μm sh = 50 μm/D sv = 50 μm/D

    “Plate15”

    sz = 83 μm sx = 108 μm sy = 72 μm

    LCLS-I Single Total Station Set-up

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011


    Monumentation network

    Monumentation Network

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011


    Uh monumentation

    1‘ stay-clear

    wall monuments

    (with removable spherical target)

    6’

    floor monument

    (with removable spherical target)

    UH Monumentation

    See ESD 1.4-113 Undulator Tunnel Survey Monument Positions

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011


    Lcls i uh with lcls ii undulators

    LCLS-I UH with LCLS-II Undulators

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011


    Observation schema

    Observation Schema

    • Laser Tracker

      • Adapt observation scheme tested in simulation to real world

        • 3 triplets per point

      • Calibrate instrument

      • Follow observation guidance:

        • 1 triplet = 2 sets of direct and reverse

    • Precision Level

      • Adapt observation scheme tested in simulation to real world

        • Loop over floor points

      • Calibrate instrument and rod

      • Follow observation guidance:

        • 1 shot = average of 3 readings

    • Other

      • Total station

      • Nadir plummet

      • Gyrotheodolite

      • Portable wire

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011


    Lcls i network for uh installation

    LCLS-I Network for UH Installation

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011


    Lcls i portable wire results

    LCLS-I Portable Wire Results

    Impact of wire on standard deviations

    Impact of wire on coordinates

    Network of 393 points with the following observation schema: triplets from 69 tracker setups, 465 height differences and 57 offset measurements to two overlapping wires (240m long and 370m long).

    A-priori standard deviations:

    Laser Tracker: sD=50 µm, sHz=70 µm/m, sV=100 µm/m

    Level: sDh=70 µm

    Offset measurement: sDo=30 µm

    Extracted from IWAA08 Poster

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011

    Network measurements alone

    Wire measurements included

    Coordinate change [µm]

    Sigma [µm]

    Position [m]

    Position [m]


    Component fiducialization

    Component Fiducialization

    • Advantage: repeatable references

    • Methodology: mechanical or magnetic

    • Tooling Choices: compatible with observation techniques in the field

    • Instrument:

      • CMM

      • Laser tracker

      • Optical tooling

      • Robotic arm

      • Photogrammetry

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011


    Mechanical fiducialization

    Mechanical Fiducialization

    LCLS-I Tweeter Quadrupole Magnet

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011


    Magnetic fiducialization

    Magnetic Fiducialization

    See LCLS-TN-05-11

    LCLS-I Undulator

    Quadrupole Magnet

    • Overall fiducialization accuracy in x and y < 25 µm

    • 3 Step Process:

      • Place wire at quadrupole center: 10 µm

      • Locate wire: 15 µm

      • Locate tooling balls: 10 µm

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011


    Undulator fiducilization

    Undulator Fiducilization

    From Zack Wolf & Georg Gassner

    LCLS-II DOE CD-1 Review, April 26, 2011

    LCLS-I Case: Pointed magnets with same sign poles are added to the ends of the undulator. These magnets have a well defined zero field point in the center. The distance from the measurement axis to the zero field point is determined. A calibration gives the distance from the zero field point to tooling balls on the pointed magnet fixture. The distance from the tooling balls on the pointed magnet fixture to tooling balls on the undulator is measured with a CMM.

    LCLS-II Case: More fiducials, independent treatment of the jaws, Measurement with laser trackers. Expected accuracy: 30 to 50 μm

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011


    Girder alignment

    Girder Alignment

    • Advantages:

      • Better relative component alignment

      • Speed up installation phase

    • Variations:

      • Individual component adjustment

      • Mover Mechanism:

        • Fixed

        • Remote

        • Feedback

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011


    Lcls i undulator girder

    LCLS-I Undulator Girder

    Extract from LCLS TN-08-03: Girder Alignment Plan

    • The Undulator Girder alignment was carried in 2 steps:

    • Pre alignment and all connection installation (wiring and plumbing in a staging area (see picture above)

    • Final alignment in a controlled temperature environment on a CMM

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011


    Lcls coordinate measuring machine

    LCLS Coordinate Measuring Machine

    • Leitz Reference Model 45129 CMM manufactured in Wetzlar (Germany)

    • Weight capacity 3000 kg

    • Measuring range is 0.9 x 1.5 x 4.5 m

    • Resolution is 0.1 µm

    • Spatial accuracy formula in µm based on L, the length measured in mm: 2.0 + L/350.

    • After specific tuning for the undulator segment weight and location on the CMM, the expected accuracy for the undulator segment should be upgraded to: 1.5 + L/500.

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011


    Component alignment

    Component Alignment

    • Timeline:

      • Template layout

      • Stand/base plate alignment

      • Component/girder alignment

    • Principle:

      • Solid monument network

      • Component fiducialization

      • Local instrument set-ups

    • Variations and possible difficulties come with the hardware installed:

      • Clearance around bolts

      • Mover system centered around their range

      • Component pre-set to nominal

      • Fiducial and mover in-line when possible

      • Right balance between fine and coarse thread

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011


    Example lcls i bth west

    Example LCLS-I BTH West

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011


    Mapping phase

    Mapping Phase

    • Observation scheme:

      • Identical to monument network

      • Including component fiducials

    • Computation phase:

      • Identical to monument network

      • Generating observed position and attitude (and their standard deviations) for each component

    • Move list

      • Option 1: to ideal

      • Option 2: to smooth line

    • The next 2 graphs show the as-built results for the 33 quadrupole magnets in the Undulator Hall in December 2008, right before the start of LCLS-I.

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011


    Lcls lcls ii survey alignment

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011


    Lcls lcls ii survey alignment

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011


    Linac laser alignment line

    Linac Laser Alignment - Line

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011


    Linac laser alignment changes

    Linac Laser Alignment - Changes

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011


    Lcls i measurement campaigns

    LCLS-I Measurement Campaigns

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011


    Uh wall deformations

    UH Wall Deformations

    Both Undulator Hall and X-Ray Tunnel show slow shrinking of the tunnel walls relative to each other by <1mm/year

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011


    Floor deformations

    Floor Deformations

    LTU

    UH

    XRT

    FEH

    Dump

    NEH

    FEE

    • 3 mm initial floor deformation, correlated with earth backfill above dump area

    • Since July 08 deformation < 0.5 mm (~0.5 μm/day for largest deformation)

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011


    Lcls survey alignment timeline

    LCLS Survey & Alignment Timeline

    May 2010

    May 2011

    Feb 2004

    May 2005

    Nov 2007

    Dec 2007

    Jan 2008

    Feb 2008

    Mar 2008

    Apr 2008

    May 2008

    Jun 2008

    Jul 2008

    Aug 2008

    Sep 2008

    Oct 2008

    Nov 2008

    Dec 2008

    Monument

    Template

    LCLS-II

    Stand / Plate

    Outside Network

    Component

    Mapping / Move

    LCLS-I e-beam Installation

    Fiducialization

    Girder Assembly

    LCLS LCLS-II Survey & Alignment

    Pohang Accelerator Laboratory, 05-31-2011


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