aLIGO LHO Logbook

H1 PEM (PEM)

richard.mccarthy@LIGO.ORG - posted 11:29, Tuesday 10 December 2019 - last comment - 15:07, Tuesday 10 December 2019(53805)

Remote Power controls on Amplifiers for PEM magnetic field injection

In an effort to minimize noise sources we have installed a remote controlled power switch on the PEM amplifiers at the End station. They are controlled via a telnet session over ethernet. The script for the Tuesday injections should turn these on automatically. eyrpc and exrpc.

Comments related to this report

patrick.thomas@LIGO.ORG - 13:19, Tuesday 10 December 2019 (53808)

Link

I updated /opt/rtcds/userapps/release/cds/h1/scripts/h1_pulizzi_power_control_ioc.py to take the ip address and channel name prefix as command line arguments.

I restarted the IOC running in screen on h1fescript0 controlling the power to the ALS fiber polarization controller using ip address 10.105.0.12 and prefix H1:CDS-PULIZZI_ACPWRCTRL_MSR0_. I verified that I could still control the power to it using the medm screen for adjusting the fiber polarization.

I started two new IOCs in screen on h1fescript0 for the newly installed remote power controls at end X and end Y:
screen -S exrpc /opt/rtcds/userapps/release/cds/h1/scripts/h1_pulizzi_power_control_ioc.py 10.106.0.171 'H1:CDS-PULIZZI_ACPWRCTRL_EX0_'
screen -S eyrpc /opt/rtcds/userapps/release/cds/h1/scripts/h1_pulizzi_power_control_ioc.py 10.106.0.172 'H1:CDS-PULIZZI_ACPWRCTRL_EY0_'

I checked /opt/rtcds/userapps/release/sys/h1/scripts/PEM_weekly_magnetic_injection.py into svn. I then updated it to to turn on and off outlet 1 of the new remote power controls at end X and end Y. I have not tested this change or checked it into svn.

https://cdswiki.ligo-wa.caltech.edu/wiki/cdsmsrpower0
https://cdswiki.ligo-wa.caltech.edu/wiki/PulizziRemotePowerControlEpics

patrick.thomas@LIGO.ORG - 15:07, Tuesday 10 December 2019 (53812)

Link

Tested the changes to PEM_weekly_magnetic_injection.py. It may fail to turn the coils back off if it is cancelled with Ctrl-C. Checked the changes into svn.