Optical & Vacuum Equipment
Layouts
Dennis Coyne
Mike Smith
Luke Williams
20 Nov 2008
Adv. LIGO Team Meeting, Caltech, Pasadena, CA
20 Nov 2008
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Methodology
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ZEMAX and SolidWorks are key tools
SolidWorks models are stored in the Adv. LIGO
Project PDMWorks vault
Import/export : manual or automated
SUBSYSTEM
ASSEMBLIES
OPTICAL
LAYOUT
CONSTRAINTS
& REQUIREMENTS
20 Nov 2008
ZEMAX
OPTICAL
LAYOUT
SOLIDWORKS
OPTOMECHANICAL
ENVELOPE
LAYOUT
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SOLIDWORKS
OPTOMECHANICAL
DETAIL
LAYOUT
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Known
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All cavity lengths
All COC and IO cavity optic positions
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For each individual interferometer, H1, H2, L1
All COC and IO wedge angles, orientations and
tolerances
Beam dump & baffle locations
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References/Sources
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Zemax models
SolidWorks Assemblies in the PDM Works vault:
 D08xxxx_aligo_io_aos_nonfolded_layout.SLDASM
 D08xxxx_aligo_io_aos_folded_layout.SLDASM
References (available from the Systems wiki):
 Optical Layout for Advanced LIGO, T010076-02
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Optic Coordinates and Cavity Lengths (for Stable Recycling Cavities),
T080078-05
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Defines constraints, payload element properties and rationale
Will be revised for the Systems FDR (before Apr-2009)
The definitive source – has tables with parameters & images of table layouts
Recycling Cavity Mirror Normal Vectors for H1, H2, and L1 (for Stable
Recycling Cavities), T080258-00
BS, CP, and ITM Wedge Angle Tolerance, T080277-02
COC Polishing Specifications Spreadsheet
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20 Nov 2008
To be a Table in the COC Final Design Report, E080494
The most convenient reference for COC & RC optic parameters
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Unknown or TBD
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Optical lever beam layouts
TCS CO2 beam paths are preliminary
TCS Hartmann paths are preliminary
ISC Table layouts are preliminary (HAM1/7 & HAM6/12)
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PSL/IO Table layouts are preliminary?
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Layout in HAM8 is preliminary & tight – may require a move of the
chamber
Independent check of Zemax
The PDMWorks vault is a mess!
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… and not yet integrated into the overall layout (not necessary?)
H2
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… and not yet integrated into the overall layout
Needs a lot of clean up for rational layout completion
Need a systematic and practical approach for layout at the full
interferometer scale and at the local chamber detail scale
Revised Payload Mass Properties (E040136-00)
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Vacuum Equipment (VE)
Rearrangement for LHO
POSSIBLY LONGER H2 INPUT
MANIFOLD TUBE TO RELEIVE
HAM8 PAYLOAD CONJESTION
NEW INPUT/OUTPUT MANIFOLD TUBES
(4 PLACES)
MOVE THE MID STATION H2 BSC
CHAMBERS TO THE END STATIONS
(2 PLACES)
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Zemax layout examples (from T080078-05)
HAM1
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HAM3
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Vertex Layout
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BSC3
ITMy (BSC1) and BS
(BSC2) chambers not
shown
HAM4
BS
ITMy
N.B.: Outriggers for the BS will
be skewed from positions
shown to fit to optics table.
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HAM3
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Input Optics Section
New Larger Diameter
Input Manifold
HAM2
HAM3
HAM1
(ISC
Vacuum Septum Plate
Readout
Chamber)
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HAM2
MC1
MC2
PR3
FI
PRM
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HAM3
MC2
TO
PR3
FROM
BS
PR2
N.B.: Baffles are not shown.
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H1/H2 End Station
Arm Cavity Baffle
Envelope
BSC-ISI Seismic Assembly,
Stage-0 “ring”
Support Tubes
ITMx, H2
Envelope
New Vacuum Spools
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ETM Transmission
Telescope Envelope
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