|
Size: 744
Comment:
|
Size: 3169
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 1: | Line 1: |
| = Beam Reducing Telescopes = | = Transmission Monitor System (TMS) = |
| Line 3: | Line 3: |
Also called "beam reducing telescope (BRT)" in LCGT. |
|
| Line 4: | Line 7: |
| '''[[../|..Up]]''' | |
| Line 7: | Line 11: |
| TBD == Applicable Documents == * Spec. for vacuum chambers * Optical Layout Drawing of the LCGT interferometer * Length Sensing and Control doc * Alignment Sensing and Control doc * CCD Monitor doc * Any... |
Transmission monitors for IR/Green beams. |
| Line 18: | Line 14: |
| TBD | === Applicable Documents === * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=1122|麻生さんによるデザイン例]] |
| Line 21: | Line 18: |
| Beams for TBD | * Collect 1064nm and 532nm light transmitting ETMs. * Monitor the off-centering and pitch/yaw fluctuations of the ITMs/ETMs relative to the preselected optical path. * Monitor the shape of the beam modes that transmit the arm cavity. === Requirements === For each TMS, * 2QPDs for 1064nm are required to monitor off-centering of the beam; one is for high gain, the other is for low gain. * 2QPDs for 1064nm are required to monitor pitch/yaw misalignments of the beam; one is for high gain, the other is for low gain. * 2QPDs for 532nm are required. * Remote stirring mirrors for QPDs are required at least in the initial commissioning phase. * Remote actuators for TMS chassis would be required. * CCD monitors for monitoring the beam mode transmitting the ETM are required. * Optical levers (or equivalent local monitors) are required. * Suspension system will require more signal channels? * Shutters for high gain QPDs are required. === List of Channels === For each TMS, ||<#FFFF00>Name||<#FFFF00>Type||<#FFFF00>Input ch#||<#FFFF00>Output ch#||<#FFFF00>Purpose||<#FFFF00>Used By|| ||QPD1H||1064nm QPD||0||4||Mon. off-centering, high gain||MIF|| ||QPD1L||1064nm QPD||0||4||Mon. off-centering, low gain||MIF|| ||QPD2H||1064nm QPD||0||4||Mon. misalignment, high gain||MIF|| ||QPD2L||1064nm QPD||0||4||Mon. misalignment, low gain||MIF|| ||QPD1G||532nm QPD||0||4||Mon. off-centering, low gain||MIF|| ||QPD2G||532nm QPD||0||4||Mon. misalignment, low gain||MIF|| ||Stirring mirrors for QPDs||TBD||24||0||Remote stirring mirrors for QPDs; 6x2x2ch||MIF|| ||CCD monitor1||TBD, for 1064nm||On/Off?||VIDEO signal?||CCD monitor||---|| ||CCD monitor2||TBD, for 532nm||On/Off?||VIDEO signal?||CCD monitor||---|| ||Shutters||TBD||2||0||On/Off of shutters for high-gain QPDs||MIF|| For each TMS suspension and local sensors, ||<#FFFF00>Name||<#FFFF00>Type||<#FFFF00>Input ch#||<#FFFF00>Output ch#||<#FFFF00>Purpose||<#FFFF00>Used By|| ||Actuators for TMS||TBD||12?||0||Remote actuation for TMS||---|| ||Optical levers for TMS||TBD||0||8||OpLev QPDx2?||---|| ||Other, related to the suspension itself ||TBD||---||---||---||---|| |
| Line 27: | Line 60: |
| * BS chamber * == Requirements == TBD == Characteristics == TBD |
* At the dedicated chambers in back of ETM chambers |
| Line 37: | Line 63: |
| == Inspection plans == TBD == Links == * [[https://dcc.ligo.org/cgi-bin/DocDB/ShowDocument?docid=29666&version=1|LIGO-T1000746-v1, Viewports Subsystem Final Design Document]] |
== External Links == * [[https://dcc.ligo.org/cgi-bin/DocDB/ShowDocument?docid=62886|LIGO-E1100537-v10, Transmission Monitor Telescope Suspension (TMS) Final Design]] * [[https://dcc.ligo.org/cgi-bin/DocDB/ShowDocument?docid=60926|LIGO-G1100439-v4, TMS Telescope Alignment]] * [[https://dcc.ligo.org/cgi-bin/DocDB/ShowDocument?docid=58277|LIGO-T1100258-v4, Transmission Monitoring Telescope and Suspension - TMS]] |
Transmission Monitor System (TMS)
Related subgroups: IOO, MIF, VAC, CRY, VIS...
Also called "beam reducing telescope (BRT)" in LCGT.
Contents
Scope
Transmission monitors for IR/Green beams.
General Description
Applicable Documents
Functions
- Collect 1064nm and 532nm light transmitting ETMs.
- Monitor the off-centering and pitch/yaw fluctuations of the ITMs/ETMs relative to the preselected optical path.
- Monitor the shape of the beam modes that transmit the arm cavity.
Requirements
For each TMS,
- 2QPDs for 1064nm are required to monitor off-centering of the beam; one is for high gain, the other is for low gain.
- 2QPDs for 1064nm are required to monitor pitch/yaw misalignments of the beam; one is for high gain, the other is for low gain.
- 2QPDs for 532nm are required.
- Remote stirring mirrors for QPDs are required at least in the initial commissioning phase.
- Remote actuators for TMS chassis would be required.
- CCD monitors for monitoring the beam mode transmitting the ETM are required.
- Optical levers (or equivalent local monitors) are required.
- Suspension system will require more signal channels?
- Shutters for high gain QPDs are required.
List of Channels
For each TMS,
Name |
Type |
Input ch# |
Output ch# |
Purpose |
Used By |
QPD1H |
1064nm QPD |
0 |
4 |
Mon. off-centering, high gain |
MIF |
QPD1L |
1064nm QPD |
0 |
4 |
Mon. off-centering, low gain |
MIF |
QPD2H |
1064nm QPD |
0 |
4 |
Mon. misalignment, high gain |
MIF |
QPD2L |
1064nm QPD |
0 |
4 |
Mon. misalignment, low gain |
MIF |
QPD1G |
532nm QPD |
0 |
4 |
Mon. off-centering, low gain |
MIF |
QPD2G |
532nm QPD |
0 |
4 |
Mon. misalignment, low gain |
MIF |
Stirring mirrors for QPDs |
TBD |
24 |
0 |
Remote stirring mirrors for QPDs; 6x2x2ch |
MIF |
CCD monitor1 |
TBD, for 1064nm |
On/Off? |
VIDEO signal? |
CCD monitor |
--- |
CCD monitor2 |
TBD, for 532nm |
On/Off? |
VIDEO signal? |
CCD monitor |
--- |
Shutters |
TBD |
2 |
0 |
On/Off of shutters for high-gain QPDs |
MIF |
For each TMS suspension and local sensors,
Name |
Type |
Input ch# |
Output ch# |
Purpose |
Used By |
Actuators for TMS |
TBD |
12? |
0 |
Remote actuation for TMS |
--- |
Optical levers for TMS |
TBD |
0 |
8 |
OpLev QPDx2? |
--- |
Other, related to the suspension itself |
TBD |
--- |
--- |
--- |
--- |
Naming Conventions
TBD
Locations
- At the dedicated chambers in back of ETM chambers