20180201
http://klog.icrr.u-tokyo.ac.jp/osl/?r=4091 http://klog.icrr.u-tokyo.ac.jp/osl/?r=4090
Today's activities
Workers: Akutsu, Miyo, Hasegawa
- Continued to attach burndy receptacle pins to the thermometers' wires.
Now 6 thermometers have pins; 5 out of 6 thermometers were online by a cryocon; the five were attached to the WAB and the suspension without indium sheet, so don't forget to attach the metals sheets
- The coat of a red wire of one of the thermometer was adhered to its green wire's coat, and tended to delaminate. Doing some tricky and careful works, this issue was resolved; again, careful visual inspection would be a key to resolve an issue.
- Attached burndy receptacle pins to two heaters in the chamber
- The two heaters were connected in parallel; in other words, two wires from different heaters are swaged to a single pin.
- Tested the heater via the distributor located outside of the clean booth; one person in the chamber touched the heater with gloved hand but did not feel any warming up; with a contact-type handy thermometer, found the rise/drop of the temperature of the heater along with the switch turned on/off.
- The resistance between W-X from P23 at the distributor box was measured as 32.5 ohm, while a heater is 50 ohm on the specification, and that of the paralleled heates was measured 25 ohm as expected.
- Set up the oplev; the pylon was rigidly fixed to the floor; an ND filter, borrowed from Kokeyama-san, was put in front of the QPD.
Calibrated the QPD of the oplev. See here; need to do further conversion to urad.
[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 calibration of the oplev; what is the arm length?
- 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.
- Wash the coil in ethanol at Univ. of Toyama...?
- Take care of water spring??
Wanted!
- A tweezer.
- Two burndy connectors, vacuum compatible.
- Chairs in the clean booth
- Cutters and scissors!!
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.