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Size: 3598
Comment:
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Size: 3637
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 11: | Line 11: |
| Transmission monitors for IR/Green beams. | . Transmission monitors for IR/Green beams. |
| Line 23: | Line 23: |
| 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. |
. 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. |
| Line 35: | Line 35: |
| 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, ||<#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|| |
| Line 49: | Line 49: |
| 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||---||---||---||---|| |
. 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 57: | Line 57: |
| TBD | . TBD |
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