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AdV-ISC (Commissioning up to first full interferometer lock)
mantovani, pinto, spinicelli, berni - 12:09 Thursday 06 June 2024 (64446) Print this report
NI down condition controller modified

The controller of the down condition for NI etalon has been modified (decreased the gain of a facto 100 and increased the pole frequency of a factor 10).

Morevoer the reset of the down offset will be done in 600 sec (to be adjusted).

Francesco will reload the controller as soon the present activity will end.

Comments to this report:
mantovani, pinto, spinicelli - 12:14 Monday 10 June 2024 (64471) Print this report

Today we slightly adjusted the NI DOWN condition by removing the 600s ramp time that didn't work properly (debug ongoing).

We also tuned the gain of the filter based on the data of one of the last unlock (gps 2024/06/6  - 14:40,  see fig. 1).

Those changes will be applied the next useful commissioning slot by restarting the process.

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mantovani, masserot, spinicelli - 12:12 Tuesday 11 June 2024 (64479) Print this report

Thanks to Alain, we modified the logic of the etalon in order to apply a ramp of 600s to the UP condition. The logic is the following:

 

###

ACL_FILTER_CH    NI_DOWN_OFFSET    "C"    1    LOOP_FREQ    INPOWERSTEP        1        "Etalon_north_down"
ACL_FILTER_CH_OPTION NI_DOWN_OFFSET        -1 "sin_inout" "linear" 0 10 0 -2    # use long-double computation

# nameOut - unit - samplingFreq - duration_0to1 - duration_1to0 - start state - channelIn - threshold_0to1 - threshold_1to0 - falling_or_rising_edge
ACL_RELAY_CH NI_DOWN_OFFSET_trig   ""    LOOP_FREQ    0    600    -2    UNLOCK_TRIG    1e-3    1e-3        "FABS>="
# nameOut - unit - samplingFreq - duration_0to1 - duration_1to0 - start state - channelIn - threshold_0to1 - threshold_1to0 - falling_or_rising_edge
ACL_FILTER_CH_RESET_CND NI_DOWN_OFFSET    NI_DOWN_OFFSET_trig

ACL_OP_CH    NI_DOWN_OFFSET_cnd    ""    "prod"    NI_DOWN_OFFSET   NI_DOWN_OFFSET_trig 

###

 

Moreover, we added to the DAQ few new channels, "NI_DOWN_OFFSET_trig" and "NI_DOWN_OFFSET_cnd".

We restarted the Etalon process at 9:43UTC.

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