| 1940 | Peter from mechanical workshop came to look at our flanges. There is no evidence of warping on IVC bottom piece, and there aren't any signs of major scratches on either flange. One scratch on bottom piece has been sanded out. |
| | For M5 stainless steel screws with a recepticle length of 6 mm the recommended torque settings are 3.258 Nm (28.84 lb-in). The maximum torque that should be applied is 4.344 Nm (38.45 lb-in). |
| | We used a thicker gauge of indium wire to seal the bottom of the IVC: 0.064“ diameter as opposed to 0.04” that we normally use. There are some imperfections in the wire, but this is the only piece we have of this size, and hopefully the indium will flow to cover these parts. The thicker gauge does mean that the screws do come very close to touching the wire. We have attempted to leave as much of a gap as possible. Hopefully this will not have an adverse effect. |
| | The recommended torque settings leave a little gap of perhaps 2 mm between the flanges. This may be due to the thicker indium wire we are using. We should wait for a few hours for the indium to flow before trying to tighten it again. There is a gap between the smallest flanges near the middle of the IVC due to using a thicker wire gauge, and this seal is leak tight. |
| 1945 | Evacuating with the scroll pump, the IVC pressure has dropped to 0.064 mbar over approximately 20 minutes of pumping. Not sure if this rate indicates a possible leak and we should tighten the bottom flange. |
| 2020 | IVC pressure has reached 0.04 mbar. Isolate scroll pump and see how high pressure reaches. |
| 2030 | Conduct electrical check: everything looks fine: no sign of the shorts to ground we witnessed at the start of Run 31. We unsure of the reasons for this. |
| | Pressure in IVC 0.25 mbar, translating to a rate of 0.02 mbar/min. Resume pumping on IVC with scroll pump. |