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LAS (bKAGRA laser)
yutaro.enomoto - 20:25 Saturday 29 September 2018 (6345) Print this report
Laser seems to be DOWN

30 mins ago.

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keiko.kokeyama - 23:33 Sunday 30 September 2018 (6355) Print this report
Thanks. We'll check tomorrow.
shinji.miyoki - 8:20 Monday 01 October 2018 (6356) Print this report
Orange lamp of YAG laser head has disappeared.
keiko.kokeyama - 8:51 Monday 01 October 2018 (6357) Print this report
The controller program says that the laser not ready. We'll go check it in the mine soon.
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keiko.kokeyama - 10:29 Monday 01 October 2018 (6359) Print this report
The laser is back. I turned off and on the laser amp and NPRO. Also the USB cable from the amp to the controller windows (k1las0) was disconnected and connected. The chiller was working OK outside.

So I am not sure exactly what was wrong. I suppose the connection from the laser amp to k1las0 was lost for some reason, as shown in the picture in my last entry. DAQmx Device should show Dev3 on the controller screen when functioning correctly.

PMC and RefCav relocked (but a bit unstable for now)
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masayuki.nakano - 12:48 Monday 01 October 2018 (6361) Print this report

Dear Keiko,

Did you check that you can choose DAQmx as Dev3 before power cycle and re-connection of the cables? If you cannot choose it, I think it is the problem in the connection between the Windows machine and the fiber amp. But if you can, it might be caused by the reboot of the Windows machine or the app for some reason.

And what was the orange lamp which Miyoki-san mentioned?

P.S.
I guess that the PMC and the RefCav would become stable after one hour, so we do not need to worry about it.

keiko.kokeyama - 14:30 Monday 01 October 2018 (6364) Print this report
No, I did not try clicking DAQmx Device before reconnecting the usb. And yes, RefCav and PMC are more stable now.
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