20180214
Today's activities
Workers: Akutsu, Miyo
- Did electric crafting for assembling photosensors.
- The actual kapton-coated wires from the PDs and the LEDs were about 40-50 mm long.
The PDs were parallelly connected, which meant two wires were swage at a single burndy female pin; note that this swage should be done after the PDs are located to their positions, otherwise the retainer cannot come through the swaged pin!!! (Consider by your brain; it is easily understood.)
- Connected an assembled photosensor head to the burndy connector P23 in the chamber with 3-m long patch cables.
- Before connecting the LED, the voltage between the anode and the cathode was measured, and was about 13.8V.
- Before connecting the LED, another LED (for contingency) was connected, and with it we illuminated the PDs and got responses.
- Connected the actual LED, and found the photosensor worked in principle; detailed measurements will be done tomorrow.
- Assembled an aluminum adapter block for heat links.
Issue: how should we connect the coil pins and the electric wires...?
[Ongoing] Need cares of water springs from anchor bolts for oplev pylons.
[Ongoing] Need to confirm what are the scratch lines made by the measurement by the KEK team last week.
Next plan
- Complete the assembly of the PS heads with clean parts (or wash them after assembled)
- Calibrate the PS.
- Complete the calibration of the oplev; the arm length was reported by Simon, so....
- Check the balance of the suspended WAB with some wires and sensors are attached.
- Check how the damping would be now after the replacement of the damping magnets.
- Check the reproducibility of the alignment of the suspension among several modes.
- Prepare calibration of photosensors.
- Check heights of several points.
- Take care of water spring??
Wanted!
- Two burndy connectors, vacuum compatible.
Stages outside the chamber to ease wiping our legs.
Good rail(?) to move the WAB suspension in the cryostat in the main beam direction.
Chain block? to support the load in the chamber.
- A clock to know the time easily.
- M6 screw set.