vernon.sandberg@LIGO.ORG - posted 13:53, Wednesday 15 March 2017 (34852)
Work Permit Summary for 2017 March 14
| Work Permit | Date | Description | alog/status |
| 6523.html | 2017-03-14 10:46 | Intentionally excite mode 23 (a parametric instability mode or PI mode of ETMY at 32 kHz) in fully locked interferometer and study its appearance in the transmon QPD signals. This task is expected to take 20-30 min. | |
| 6522.html | 2017-03-13 18:07 | We will do the following activities related to the bullseye sensor during the maintenance period. (1) Go in to the PSL room and realign the the beam for the bullseye sensor. (2) Power up the diagnostic breadborad (DBB) and study coherence between the DBB signals and bullseye sensor signals. DBB will be switched off after the measurement. (3) Calibrate the IMC WFS DC signals for beam pointing jitter by measuring their spectra by intentionally unlocking the IMC. | 34829, 34849, 34845, 34847 |
| 6521.html | 2017-03-13 08:45 | Swap the 4 laser head flow sensors in the PSL HPO for new ones. This is to hopefully alleviate the tripping issues we have seen over the last few weeks. The IFO needs to be unlocked and in the DOWN state as this work will require us to completely shut down the PSL for the duration. | 34811, 34839 |
| 6520.html | 2017-03-10 08:48 | Recenter T240s and power cycle CPSs: Deisolate (ISI-OFFLINE), center T240 masses (remote possible) and Power Cycle Stage2 Corner2 CPS Rack (CER or at Chamber,) Re-Isolate platform. FRS 7565 Alog 34677 | 34805 |
| 6519.html | 2017-03-09 09:55 | Add the SEISMON EPICS channels to the DAQ EDCU for trending purposes. Requires DAQ restart. | |
| 6518.html | 2017-03-08 08:48 | Erect additional storage racks in both mid stations for 3 IFO storage. These racks will be located in the air locks and not in the old VEA. | |
| previous Work Permits | |||
| 6512.html | 2017-03-06 09:48 | Increase power on ETMx and ETMy oplevs to attempt to decrease glitching. ETMx/y oplevs have been responsible for several hveto round wins due to glitching, this is an attempt to lessen that while I work on stabilizing replacement lasers for these oplevs. No viewports will be exposed during this work. | 34817 |
| 6511.html | 2017-03-06 08:32 | Replace HWS BS beam dumps. Install GigE camera and pickoff mirror on HWSX. | 34643, 34649, 34825 |