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AdV-TCS (CO2 laser projector)
boldrini, casanueva, magazzu, nardecchia - 20:29 Friday 06 June 2025 (66924) Print this report
CH tuning for lock acquisition

This afternoon, due to the problems in the lock acquisition reported in the entry  66921, tthe CH powers were adjusted in several steps. In the end, the following settings were used:

  • NI CH pickoff (with all the actuators ON): 1.44 → 1.81 W

                        → 113+60=173 mW injected into the ITF

  • WI CH pickoff (with all the actuators ON): 0.77→ 0.83 W

                        → 59+ 10=69 mW  injected into the ITF

 The CO2 powers settings are summarized in the table below:

 

Reference

CH [W]

INNER DAS [W]

OUTER DAS [W]

W

on the ITF

0.069*

0.150

2.38

on the pickoff 

0.42

0.025

0.39

N

on the ITF

0.173*

0.47

4.16

on the pickoff 

1.06 

0.08

0.68

* The CH values still need to be checked by closing the flip mirrors (TO BE DONE).

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