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= Viewports on Vacuum Chambers (at Room Temperature) = = Viewports (at Room Temperature) =
'''''Related subgroups:''''' MIR, IOO, MIF, VAC, CRY, VIS...
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'''[[KAGRA/Subgroups/AOS| back to AOS top]]'''
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This subsystem provides the optical viewports to pass through the optical beams from the vacuum chambers in which LCGT main interferometer is stored.
The optical beams include...		  . This subsystem provides the optical viewports mounted on the vacuum chambers to pass the optical beams into or from the LCGT in-vacuum interferometer. The optical beams include...
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The viewport subsystems that will be applied to the cryo-vacuum chambers for ITMs/ETMs of the future LCGT are '''NOT''' included in the scope of this subsystem so far.  . Cryo-vacuum viewports are '''NOT''' included in the scope of this subsystem so far.
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== Introduction ==
We can extract optical beams from the interferometer inside the vacuum chamber at the viewports.
The optical beams are for length control scheme of the interferometer, alignment control scheme of the mirrors, optical levers for LCGT-SUS, and other monitoring devices (CCD or equivalents).

Stray lights?

=== Applicable Documents ===		 == Applicable Documents ==
 * Spec. for vacuum chambers
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 * Length Sensing doc
 * Alignment Sensing doc		  * Length Sensing and Control doc
 * Alignment Sensing and Control doc
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=== Definitions === == General Description ==
 . At the viewports, we can extract optical beams from the interferometer placed inside the vacuum chambers. The optical beams would be utilized for length and alignment sensing and control scheme, optical levers for suspensions, and other monitoring devices (CCD or equivalent video cameras).

 . For example, the viewport would be equipped with
  * AR coating for 1064 nm and 532 nm
  * Wedge angle
 . Details are described in ''Characteristics'' section.
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== General Description == === Functions ===
 . Beams for
  * Transmission of IR/Green lasers
  * Optical Lever transmitter/receiver
  * Video camera
  * Illumination
  * Diagnostic
  * (Squeeze)
  * (Spare)
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== Naming Conventions == === Naming Conventions ===
 . TBD
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== Viewport Locations ==
 * BS chamber
 *
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== Links ==
 * [[https://dcc.ligo.org/cgi-bin/DocDB/ShowDocument?docid=29666&version=1|LIGO-T1000746-v1, Viewports Subsystem Final Design Document]]		 <<Anchor(Locations)>>
=== Locations ===
 . Here, the number of viewports required by each subsystem at each vacuum chamber is listed.

 ||<#FFFF00>Chamber Name||<#FFFF00>Type||<#FFFF00>Quantity||<#FFFF00>Purpose||<#FFFF00>Used By||
 ||PRM||1064nm AR||1||REFL port||ISC||
 ||PRM||!OpLev wavelength||2||!OpLev||AOS/SUS||
 ||PRM ||Visible||1||CCD||Everyone||
 ||PR2||1064nm&532 dichroic AR||1 or 2||POP/Green||ISC||
 ||PR2||!OpLev wavelength||2||!OpLev||AOS/SUS||
 ||PR2 ||Visible||1||CCD||Everyone||
 ||PR3||!OpLev wavelength||2||!OpLev||AOS/SUS||
 ||PR3 ||Visible||1||CCD||Everyone||
 ||BS ||1064nm AR||1||POX/POY beams||ISC||
 ||BS ||!OpLev wavelength||2||Optical Lever||AOS/SUS||
 ||BS ||Visible||1||CCD||Everyone||
 ||ITMX||!OpLev wavelength||2||!OpLev||AOS/SUS||
 ||ITMX||Visible||1||CCD||Everyone||
 ||ITMY||!OpLev wavelength||2||!OpLev||AOS/SUS||
 ||ITMY||Visible||1||CCD||Everyone||
 ||ETMX||1064nm&532 dichroic AR||1||Transmission||ISC||
 ||ETMX||!OpLev wavelength||2||!OpLev||AOS/SUS||
 ||ETMX||Visible||1||CCD||Everyone||
 ||ETMY||1064nm&532 dichroic AR||1||Transmission||ISC||
 ||ETMY||!OpLev wavelength||2||!OpLev||AOS/SUS||
 ||ETMY||Visible||1||CCD||Everyone||
 ||SRM||1064nm AR||1||AS port||ISC||
 ||SRM||!OpLev wavelength||2||!OpLev||AOS/SUS||
 ||SRM ||Visible||1||CCD||Everyone||
 ||SR2||1064nm&532 dichroic AR||1 or 2||POS/Green||ISC||
 ||SR2||!OpLev wavelength||2||!OpLev||AOS/SUS||
 ||SR2 ||Visible||1||CCD||Everyone||
 ||SR3||!OpLev wavelength||2||!OpLev||AOS/SUS||
 ||SR3 ||Visible||1||CCD||Everyone||


== Requirements ==
 . TBD

== Characteristics ==
 . TBD


== Inspection plans ==
 . See [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=1231|JGW-T1201231, Effect due to viewports for optical lever (in Japanese)]]


== Procurement process and plans ==
 . TBD


== External Links ==
 * [[https://dcc.ligo.org/cgi-bin/DocDB/ShowDocument?docid=29666|LIGO-T1000746-v1, Viewports Subsystem Final Design Document]]
 * [[https://dcc.ligo.org/cgi-bin/DocDB/ShowDocument?docid=13226|LIGO-E1000246, 6.0 inch Vacuum Viewport Specification]]
 * [[https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=61876|LIGO-T1100292, Viewport Source List]]
 * [[https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=39955|LIGO-E1100247, Viewport Production Plan]]


 * [[https://dcc.ligo.org/cgi-bin/DocDB/ShowDocument?docid=8509|LIGO-T1000022-v4, Viewports Subsystem Requirements Document]]
 * [[https://dcc.ligo.org/cgi-bin/DocDB/ShowDocument?docid=12798|LIGO-T1000334-v1, Review Report Interferometer Sensing and Control Final Design]]

Viewports (at Room Temperature)

Related subgroups: MIR, IOO, MIF, VAC, CRY, VIS...

back to AOS top

Contents

  1. Viewports (at Room Temperature)
    1. Scope
    2. Applicable Documents
    3. General Description
      1. Functions
      2. Naming Conventions
      3. Locations
    4. Requirements
    5. Characteristics
    6. Inspection plans
    7. Procurement process and plans
    8. External Links

Scope

  • This subsystem provides the optical viewports mounted on the vacuum chambers to pass the optical beams into or from the LCGT in-vacuum interferometer. The optical beams include...

  • Cryo-vacuum viewports are NOT included in the scope of this subsystem so far.

Applicable Documents

  • Spec. for vacuum chambers
  • Optical Layout Drawing of the LCGT interferometer
  • Length Sensing and Control doc
  • Alignment Sensing and Control doc
  • Optical lever doc
  • CCD Monitor doc
  • Any...

General Description

  • At the viewports, we can extract optical beams from the interferometer placed inside the vacuum chambers. The optical beams would be utilized for length and alignment sensing and control scheme, optical levers for suspensions, and other monitoring devices (CCD or equivalent video cameras).
  • For example, the viewport would be equipped with
    • AR coating for 1064 nm and 532 nm
    • Wedge angle

  • Details are described in Characteristics section.

Functions

  • Beams for
    • Transmission of IR/Green lasers
    • Optical Lever transmitter/receiver
    • Video camera
    • Illumination
    • Diagnostic
    • (Squeeze)
    • (Spare)

Naming Conventions

  • TBD

Locations

  • Here, the number of viewports required by each subsystem at each vacuum chamber is listed.

    Chamber Name

    Type

    Quantity

    Purpose

    Used By

    PRM

    1064nm AR

    1

    REFL port

    ISC

    PRM

    OpLev wavelength

    2

    OpLev

    AOS/SUS

    PRM

    Visible

    1

    CCD

    Everyone

    PR2

    1064nm&532 dichroic AR

    1 or 2

    POP/Green

    ISC

    PR2

    OpLev wavelength

    2

    OpLev

    AOS/SUS

    PR2

    Visible

    1

    CCD

    Everyone

    PR3

    OpLev wavelength

    2

    OpLev

    AOS/SUS

    PR3

    Visible

    1

    CCD

    Everyone

    BS

    1064nm AR

    1

    POX/POY beams

    ISC

    BS

    OpLev wavelength

    2

    Optical Lever

    AOS/SUS

    BS

    Visible

    1

    CCD

    Everyone

    ITMX

    OpLev wavelength

    2

    OpLev

    AOS/SUS

    ITMX

    Visible

    1

    CCD

    Everyone

    ITMY

    OpLev wavelength

    2

    OpLev

    AOS/SUS

    ITMY

    Visible

    1

    CCD

    Everyone

    ETMX

    1064nm&532 dichroic AR

    1

    Transmission

    ISC

    ETMX

    OpLev wavelength

    2

    OpLev

    AOS/SUS

    ETMX

    Visible

    1

    CCD

    Everyone

    ETMY

    1064nm&532 dichroic AR

    1

    Transmission

    ISC

    ETMY

    OpLev wavelength

    2

    OpLev

    AOS/SUS

    ETMY

    Visible

    1

    CCD

    Everyone

    SRM

    1064nm AR

    1

    AS port

    ISC

    SRM

    OpLev wavelength

    2

    OpLev

    AOS/SUS

    SRM

    Visible

    1

    CCD

    Everyone

    SR2

    1064nm&532 dichroic AR

    1 or 2

    POS/Green

    ISC

    SR2

    OpLev wavelength

    2

    OpLev

    AOS/SUS

    SR2

    Visible

    1

    CCD

    Everyone

    SR3

    OpLev wavelength

    2

    OpLev

    AOS/SUS

    SR3

    Visible

    1

    CCD

    Everyone

Requirements

  • TBD

Characteristics

  • TBD

Inspection plans

Procurement process and plans

  • TBD

LCGT/subgroup/AOS/Viewport1 (last edited 2012-09-16 20:40:35 by KiwamuIzumi)