aLIGO LHO Logbook

H1 TCS (TCS)

camilla.compton@LIGO.ORG - posted 10:54, Tuesday 27 April 2021 - last comment - 11:29, Thursday 24 February 2022(58758)

Update of TCS HWS SLED stock

In the LVEA TCS Cabintets (next to BSC3) we have the following SLEDs:

Superluminescent Diode QSDM-790-5 S/N 07.14.254 - OLD removed Sept 2018 alog#44201
Superluminescent Diode QSDM-790-5 S/N 06.18.002 - NEW
Superluminescent Diode QSDM-840-5 S/N 07.14.266 - OLD removed March 2021 alog#58074
Superluminescent Diode QSDM-840-5 S/N 11.17.127 - NEW

We may soon replace the ITMX SLED using QSDM-840-5 S/N 11.17.127 (alog#58569) so will plan to order new SLEDs of both type soon.

Is there any reason to keep the old removed SLEDs in storage?

Comments related to this report

camilla.compton@LIGO.ORG - 13:28, Monday 07 June 2021 (59148)

Last week I found another box in the cabinets containing 2 more 790nm SLEDs. In alog 41411 Aidan thinks that S/N .255 may still be okay.

camilla.compton@LIGO.ORG - 08:40, Wednesday 07 July 2021 (59334)

Just received and will place in LVEA TCS cabinet:

camilla.compton@LIGO.ORG - 10:01, Wednesday 06 October 2021 (59529)

Below SLEDs have all been used/ now broken and are now being disposed of.

Superluminescent Diode QSDM-790-5 S/N 12.05.21
Superluminescent Diode QSDM-840-5 S/N 12.02.44; S/N 12.02.46; S/N 07.14.264; S/N 07.14.265; S/N 07.14.266;

camilla.compton@LIGO.ORG - 13:34, Monday 11 October 2021 (60208)

Updated in ICS as DEFECT-TCS-7749.

camilla.compton@LIGO.ORG - 11:29, Thursday 24 February 2022 (61895)

23rd Feb 2022 swapped ITMX QSDM-790-5 S/N 06.18.001 for new S/N 06.18.002, see alog 61892. Comments havce been added to ICS records.