X-end PCal

Urgent

Excitation port noise

2nd-urgent

Stray light
- Tx PDs detect light even if the AOM input is almost 0.
- Put dumpers

~11/3 first test to inject PCal laser to the X-end test mass

Rx module alignment
- QPD alignment
OL/CL TF measurement
- OFS board gain seems strange. Saturation around 13 dB.
- Strange bump in AA/AI (~6 kHz)

~X-arm commissioning line injection

BPM test
Preparation for X-arm commissioning calibration line injection
- Guardian

~O3

RPN measurement
Laser noise measurement
Harmonics noise measurement
VGA noise measurement
Excitation noise measurement
- DGS part seems not noisy, but cause large noise when connected to the OFS.
Peak stability test
Shot noise
Offset input noise
Noise model
Unstable D-sub connection at Tx module
- Some connectors are dead.
OFS upgrade
Operation tool preparation

Bonus work

AOM current
- Sometimes over 0.5 V ?
Take care about grounding

Pre-categorization

Y-end PCal

Periscope re-installation

Laser power calibration setting in Toyama Univ.

~Y-arm commissioning

Prepare cross calibration setup and calibrate an integrating sphere

-  ⇤ ← Revision 14 as of 2018-09-20 16:14:39 → 
  Size: 2647
  Editor: chihiro.kozakai
  Comment:
+   ← Revision 29 as of 2018-11-22 09:41:33 → ⇥
  Size: 2022
  Editor: chihiro.kozakai
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 20:
- * TxPD1 repairing 
  * Repaired. To be checked.
 * OFS2 closed loop functionality repairing 
  * Relay is OK. Investigating the cause.
  * Asked Bin-Hua to bring relay.
 * DAC noise problem
  * With DAC cable, very large noise and offset are observed. It may be difficult to set working point.
+ * Excitation port noise
-Line 31:
+Line 24:
- * DAC input bias between MEDM and actual
 * Laser remote control
  * Setup done. LAN cable should be replaced to shorter one.
-Line 35:
+Line 25:
+  * Tx PDs detect light even if the AOM input is almost 0.
-Line 36:
+Line 27:
-   * Borrowing 2 from Toyama univ. They has to be returned on 9/19 or 20.
 * WSK measurement 
  * Modification is required from LIGO's procedure. 
  * Code for WSK measurement analysis
  * To be delivered on 9/19 or 20 to Toyama Univ.
  * May have to prepare voltage calibrator to calibrate readout by DGS.
-Line 43:
+Line 28:
-~9/11
+~11/3 first test to inject PCal laser to the X-end test mass
-Line 45:
+Line 30:
- * Periscope install
  * Equip picomoters to the mirror

~10/3
 * Complete periscope install
-Line 51:
+Line 31:
-~10/20 first test to inject PCal laser to the X-end test mass

 * AOM response measurement
  * Check working point is consistent to that in KEK
+  * QPD alignment
-Line 57:
+Line 33:
+  * OFS board gain seems strange. Saturation around 13 dB.
  * Strange bump in AA/AI (~6 kHz)
-Line 61:
+Line 39:
-  * Picomoter setting
-Line 63:
+Line 40:
+  * Guardian
-Line 71:
+Line 49:
+  * DGS part seems not noisy, but cause large noise when connected to the OFS.
-Line 78:
+Line 57:
- * Cable arrangement
-Line 87:
+Line 65:
- * Initial laser power just after turned on seems too small ?
-Line 94:
+Line 71:
+ * Periscope re-installation
-Line 96:
+Line 75:
+~Y-arm commissioning

 * Prepare cross calibration setup and calibrate an integrating sphere