Differences between revisions 19 and 29 (spanning 10 versions)

Interferometer Characterization at the 40m prototype

Goals

To help the DRMI commissioning that will be performed at LLO.

Motivations

In the aLIGO schedule a DRMI test will start on May 2011 at LLO. Prior to the DRMI test we, the 40m lab, should help their commissioning to make the things smooth and hence allow to finish the commissioning in the shortest time. Moreover any commissioning tests that will be performed at LLO should be well predicted and tested at the 40m so that the people at the site can easily pass through all the commissioning tests and possibly can spend time for a real trouble shooting (commissioning) to fix unexpected issues.
So for this purpose some recipes must be prepared by the 40m lab. Each recipe includes descriptions about how to make a commissioning test, how to estimate important parameters and the results at the 40m. Additionally some useful scripts must be developed at the 40m.

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Contents

Interferometer Characterization at the 40m prototype
1. Goals
2. Motivations
DRMI Characterization Plan at the 40m

DRMI Characterization Plan at the 40m

Schnupp asymmetry measurement and its adjustment

Requirement

 Schnupp asymmetry = 0.0342 [m] + XXX [mm] - YYY [mm]

Since Schnupp asymmetry determines the transmissivity of the

Michelson part and hence compose ..

How to

Here is an instruction how to measure the Schnupp asymmetry.

Results

The result at the 40m was ... and the precision was +/- XXX mm. This implies us to fix the length of the asymmetry.

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PRC length measurement and its adjustment

Requirements

{{{ lprc = 6.7538 [m] +/- XXX [mm]

}}}

In order to resonate both f1 and f2 sidebands the length should be adjusted to ..
In addition to that the arm makes the non-zero phase shift on these sidebands and makes the ..

How to

To measure the length of the recycling cavity,

Results

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SRC length measurement

Requirements

{{{ lsrc = 5.39915 [m] +/- XXX mm }}}

How to

Results

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Recycling gain measurements

Since the recycling gain is related to loss in the recycling cavity,...

How to

Results

 Carrirer    = XX
 f1 sideband = YY
 f2 sideband = ZZ

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Beam spot position on BS

Requirements

{{{ off-centering < XXX mm }}}

To get a clean AS signal

How to

results

Reflectivity check

How to

Results

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Sensing matrix check

How to

Results

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Calibration of Actuator responses

How to

Results

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f2a filter adjustment

Requirement

How to

Results

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IFO modeling

How to

Results

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Estimation of Suspensions' Position

Requirements

How to

Results

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Locking procedure

How to

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MICH actuator decoupling

Requirements

How to

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-  ⇤ ← Revision 19 as of 2011-06-06 21:36:15 → 
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  Editor: KiwamuIzumi
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+   ← Revision 29 as of 2011-06-07 05:38:43 → ⇥
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  Editor: KiwamuIzumi
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- . In the aLIGO schedule ''''' a DRMI test will start on May 2011 at LLO. ''''' Prior to the DRMI test we, the 40m lab, should help their commissioning to make the things smooth and hence allow to finish the commissioning in shorter time. Moreover any commissioning tests that will be performed at LLO should be well predicted and tested at the 40m so that the people at the site can easily pass through all the commissioning tests and possibly can spend time for a real trouble shooting (commissioning) to fix unexpected issues.
+ . In the aLIGO schedule ''''' a DRMI test will start on May 2011 at LLO. ''''' Prior to the DRMI test we, the 40m lab, should help their commissioning to make the things smooth and hence allow to finish the commissioning in the shortest time. Moreover any commissioning tests that will be performed at LLO should be well predicted and tested at the 40m so that the people at the site can easily pass through all the commissioning tests and possibly can spend time for a real trouble shooting (commissioning) to fix unexpected issues.
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-== Schnupp asymmetry measurement ==
+== Schnupp asymmetry measurement and its adjustment ==
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+  . {{{ 
 Schnupp asymmetry = 0.0342 [m] + XXX [mm] - YYY [mm]
}}}
 . Since Schnupp asymmetry determines the transmissivity of the 
Michelson part and hence compose ..
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+ . Here is an instruction how to measure the Schnupp asymmetry.
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-[[BR]]
+ . The result at the 40m was ... and the precision was +/- XXX mm. This implies us to fix the length of the asymmetry.
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-== Cavity length measurements ==
+[[BR]][[BR]]


== PRC length measurement and its adjustment ==
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+ . {{{ lprc = 6.7538 [m] +/- XXX [mm]
}}}
 . In order to resonate both f1 and f2 sidebands the length should be adjusted to ..

 . In addition to that the arm makes the non-zero phase shift on these sidebands and makes the ..
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+ . To measure the length of the recycling cavity,
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-[[BR]]
+ .
[[BR]][[BR]]

== SRC length measurement ==
=== Requirements ===
 . {{{ lsrc = 5.39915 [m] +/- XXX mm
 }}}
=== How to ===
 . 
=== Results ===
 .
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+ . Since the recycling gain is related to loss in the recycling cavity,...
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+ .
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-[[BR]]
+ . {{{
 Carrirer    = XX
 f1 sideband = YY
 f2 sideband = ZZ
}}}
[[BR]][[BR]]
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+== Beam spot position on BS ==
=== Requirements ===
{{{ off-centering < XXX mm
}}}
 . To get a clean AS signal

=== How to ===
=== results ===
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== MICH actuator decoupling ==
=== Requirements ===
=== How to ===
[[BR]]
[[BR]]

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