Diff for "KAGRA/Subgroups/VIS/OpsManual/OpLev/TypeB"

Differences between revisions 19 and 20

This is the draft of the oplev diagonalization procedure.

In the corresponding directory for the suspension you are working with, create a new directory with the date as a name. For example,
- /kagra/Dropbox/Subsystems/VIS/TypeBData/SRM/OPLEV/measurements/20191208/
Into the newly created directory copy the corresponding template files from
- /kagra/Dropbox/Subsystems/VIS/TypeBData/SRM/OPLEV/templates/. The templates are different for each suspension so make sure you use the correct ones.
Align the optic into a convenient orientation.
- Use Guardian to set the suspension in IM_DAMP mode.
- Align the oplev beam to the centre of the QPDs. Use the IM test channels to move the marionette such that the readout of the oplev in Normalized Displacement Units (ndu) are close to zero. (Which medm screen shows this?)
Use diaggui to open the file SRM_TM_OPLEV_L_PREDIAG.xml, carry out the measurement and save the results.
Use diaggui to open the file SRM_TM_OPLEV_P_PREDIAG.xml, carry out the measurement and save the results.
Use diaggui to open the file SRM_TM_OPLEV_Y_PREDIAG.xml, carry out the measurement and save the results.
Open the file SRM_TM_OPLEV_L_PREDIAG.xml again. At the TM-L resonant frequency around 0.656 Hz
- Take a note of the amplitudes x_len and y_len in the plot "ADS: x_len (red), y_len (blue)" using the cursor feature of diaggui,
- Take a note of the relative phase between x_len and y_len in the plot "Transfer function: x_len and y_len relative phase".
  - If the phase is around 0° set x_len > 0 and y_len > 0.
  - If the phase is around ±180° set x_len < 0 and y_len > 0.
- Take a note of the amplitudes x_tilt and y_tilt in the plot "ADS: x_tilt (red), y_tilt (blue)".
- Take a note of the relative phase between y_len and x_tilt using the red line in the plot "Transfer function: x_tilt (red), y_tilt (blue) phase additional information".
  - If the phase is around 0° set x_tilt > 0.
  - If the phase is around ±180° set x_tilt < 0.
- Take a note of the relative phase between y_len and y_tilt using the blue line in the plot "Transfer function: x_tilt (red), y_tilt (blue) phase additional information".
  - If the phase is around 0° set y_tilt > 0.
  - If the phase is around ±180° set y_tilt < 0.
Open the file SRM_TM_OPLEV_P_PREDIAG.xml. At the TM-P resonant frequency around 0.820 Hz
- Take a note of the amplitudes x_len and y_len in the plot "ADS: x_len (red), y_len (blue)" using the cursor feature.
- Take a note of the relative phase between x_len and y_len; use the plot "Transfer function: x_len and y_len relative phase".
  - If the phase is around 0° set x_len > 0 and y_len > 0.
  - If the phase is around ±180° set x_len > 0 and y_len < 0.
- Take a note of the amplitudes x_tilt and y_tilt in the plot "ADS: x_tilt (red), y_tilt (blue)".
- Take a note of the relative phase between x_tilt and y_tilt; use the plot "Transfer function: x_tilt and y_tilt relative phase".
  - If the phase is around 0° set x_tilt > 0.
  - If the phase is around ±180° set x_tilt < 0.
Open the file SRM_TM_OPLEV_Y_PREDIAG.xml. At the TM-P resonant frequency around 1 Hz
- Take a note of the amplitudes x_len and y_len in the plot "ADS: x_len (red), y_len (blue)" using the cursor feature,
- Take a note of the relative phase between x_len and y_len; use the plot "Transfer function: x_len and y_len relative phase"; HOW TO USE THIS INFORMATION CORRECTLY?
- Take a note of the amplitudes x_tilt and y_tilt in the plot "ADS: x_tilt (red), y_tilt (blue)".
- Take a note of the relative phase between x_tilt and y_tilt; use the plot "Transfer function: x_tilt and y_tilt relative phase"; HOW TO USE THIS INFORMATION CORRECTLY?
Open the Matlab file oplev_diagonalization.m
Scroll down to around line 104 and make sure the right-hand side of the five listed assignments refer to the suspension you are working with (BS, SR2, SR3, SRM).
Scroll down to around line 133 and write the information in the section according to the examples, which are commented lines. How to write the signs correctly?
Execute the file. Copy the matrix into the medm screen.
Run diagnosis
Write a klog with the following format.

KAGRA/Subgroups/VIS/OpsManual/OpLev/TypeB (last edited 2020-03-30 15:34:33 by fabian.arellano)

-  ⇤ ← Revision 19 as of 2020-03-16 18:27:03 → 
  Size: 4374
  Editor: fabian.arellano
  Comment:
+   ← Revision 20 as of 2020-03-16 18:45:19 → ⇥
  Size: 4627
  Editor: fabian.arellano
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 17:
-   * If the phase is around  ±180° set x_len > 0 and y_len < 0.
+   * If the phase is around  ±180° set x_len < 0 and y_len > 0.
 Line 19:
-  * Take a note of the relative phase between '''x_len''' and  '''x_tilt''' in the plot '''"Transfer function: x_tilt and y_tilt relative phase"'''.
+  * Take a note of the relative phase between '''y_len''' and  '''x_tilt''' using the '''red line''' in the plot '''"Transfer function: x_tilt (red), y_tilt (blue) phase additional information"'''.
 Line 22:
-  * Take a note of the relative phase between '''x_len''' and '''y_tilt''' in the plot '''"XXXXXXXXXXXX"'''.
+  * Take a note of the relative phase between '''y_len''' and '''y_tilt''' using the '''blue line''' in the plot '''"'''''''''Transfer function: x_tilt (red), y_tilt (blue) phase additional information'''"'''.
   * If the phase is around  0° set y_tilt > 0.
   * If the phase is around ±180° set y_tilt < 0.