Differences between revisions 5 and 8 (spanning 3 versions)

Vent checklists

Turn OFF PZT high voltage

Alignment precedure

Put input PZTs in center of range.
Place cage-mount aperture targets on BS and PRM cages
Using PZT mirrors ONLY, center beam in PRM aperture, and on PR2 folding mirror, and center PRM retro-reflection in YAW at PZT1/Faraday.
Adjust PRM pitch biases to center retro-reflection in pitch.
Add brass-mount apertures to ITMY and ETMY.
Unclamping and adjusting in yaw, adjust PR2 and PR3 folding mirrors such that beam is through BS, ITMY, and ETMY apertures.
Using PR2/3 pitch hysteresis, adjust pitch to center beam through BS/ITMY/ETMY apertures.
Align Y arm PLUS PR2/3:
- put alignment targets on ITMY/ETMY cages
- use alignment ruler for PR2/3
- using PZT1/2, iteratively:
  - center beam on ITMY
  - center beam on ETMY
  - center beam on PR2/3
    - use PR2/3 hysteresis to adjust pitch of PR2/3
- flashes in Y trans
Center beam on PRM:
- height should be constrained at this point based on PR2/3 centering and Y arm alignment
- move PRM cage if misaligned in yaw
- PRM retro-reflection should come out REFL cleanly
Center beam on BS (should not need adjusting):
- put alignment target on BS
Align X arm:
- put alignment targets on ITMX/ETMX cages
- use BS to center beam on ETMX
- ITMX height should be constrained by BS/ETMX
- adjust ITMX cage if misaligned in YAW
- flashes in X trans
Align SRC
- check beam centering on SR3/2/M
- adjust SRM retro-reflection for centered return beam on BS

Closeup checklist

Center beam on all AS optics
Make sure REFL is clear
- dither PRM, see motion on AP tables
Make sure AS is clear
- dither BS/ITM, see motion on AP tables
Using IPANG/POS pick-off mirrors, center beams on:
- IPPOS
- IPANG
Check all OpLevs centered, in and out of vacuum
Turn PZT high voltage OFF

-  ⇤ ← Revision 5 as of 2012-10-23 00:05:36 → 
  Size: 735
  Editor: JamesonrollinsATligoDOTorg
  Comment:
+   ← Revision 8 as of 2012-11-05 22:07:16 → ⇥
  Size: 1994
  Editor: JamesonrollinsATligoDOTorg
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 6:
-= Closeup checklist =
+= Alignment precedure =
 Line 8:
- * Turn PZT high voltage ON
-Line 11:
+Line 10:
- * Center beam on BS
   * use alignment target on BS
+ * Place cage-mount aperture targets on BS and PRM cages

 * Using PZT mirrors ONLY, center beam in PRM aperture, and on PR2 folding mirror, and center PRM retro-reflection in YAW at PZT1/Faraday.

 * Adjust PRM pitch biases to center retro-reflection in pitch.

 * Add brass-mount apertures to ITMY and ETMY.

 * Unclamping and adjusting in yaw, adjust PR2 and PR3 folding mirrors such that beam is through BS, ITMY, and ETMY apertures.

 * Using PR2/3 pitch hysteresis, adjust pitch to center beam through BS/ITMY/ETMY apertures.
-Line 20:
+Line 29:
-   * get flashes in Y trans
 * Align PRC:
   * check beam height (center) on PRM/2/3
   * center beam on PRM
+       * use PR2/3 hysteresis to adjust pitch of PR2/3
   * flashes in Y trans

 * Center beam on PRM:
   * height should be constrained at this point based on PR2/3 centering and Y arm alignment
   * move PRM cage if misaligned in yaw
   * PRM retro-reflection should come out REFL cleanly

 * Center beam on BS (should not need adjusting):
   * put alignment target on BS
-Line 25:
+Line 41:
+   * put alignment targets on ITMX/ETMX cages
-Line 26:
+Line 43:
+   * ITMX height should be constrained by BS/ETMX
   * adjust ITMX cage if misaligned in YAW
   * flashes in X trans
-Line 27:
+Line 47:
- * Center beams on:
+ * Align SRC
   * check beam centering on SR3/2/M
   * adjust SRM retro-reflection for centered return beam on BS

= Closeup checklist =

 * Center beam on all AS optics

 * Make sure REFL is clear
   * dither PRM, see motion on AP tables
 * Make sure AS is clear
   * dither BS/ITM, see motion on AP tables

 * Using IPANG/POS pick-off mirrors, center beams on:
-Line 30:
+Line 63:
- * Make sure REFL is clear
 * Make sure AS is clear
+ * Check all OpLevs centered, in and out of vacuum