The Chamber has continued to pump overnight and we have reached a pressure of 3.3e-6 mbar as of 10:15. Power cable for the hot cathode gauge was found. Gauge did not give a reading so pin connections were checked, all is okay so it may be thepressure is still too high within the chamber, gauge was thus turned off. I have attached the RGA from this morning which has increased accuracy so has been cleared up for most of the noise from yesterday. I have begun removing the covers for the neg-ion pumps, attached is the how it looks without the cover. The covers have strong magnets in them so I will put in a box far away from our electronics.

10:15    3.3e-6 mbar (cart)

11:27    3.2e-6 mbar (cart)

13:26    3.2e-6 mbar (cart)

16:00    3.2e-6 mbar (cart)

I have begun manually reducing the temperature for the bakeout, to observe the rate of cooling across the vessel. I have noticed a bug in the program, the rate of each thermocouple reads as if it is increasing despite the decrease in temperature of the thermocouple. The actual temperatures and averages appear to be working okay. 

09:43   RE-72 temperatures are 135 deg. Temperature set to 125 deg.

11:01   RE-72 temperatures are 125 deg. Chamber temps equillibriating, average chamber temperature 125.5 deg and max difference is ~3 deg. Temperature set to 100 deg.

11:14   RE-72 temperatures are 115 deg. Chamber max difference exceeds 10 deg, chamber average is 115 deg. Temperature set to 115 deg will wait to equilllibriate. Recommend not to lower temperature by >10 deg. Top of the chamber cools much slower than the bottom. 

13:26   RE-72 temperatures are 115 deg. Chamber average is 115.3 deg, chamber max difference is 2.8 deg. Temperature set to 105 deg.

14:20 Previously unobserved bug occured - all temperature display frozen. Rates still OK. Temperature control still OK. Rebooted Baking.x remotely. Back OK. Reduced temperature to 90 C. See attached temperature plot before rebooting.

18:00 Temperature reduced to 80 deg.

21:25 Temperature reduced to 75 deg.