02:15

Density remains stable at 155 K

Temperature setpoint decreased by 1K. Aim to get to 110 K to see if higher stable density can be achieved. 

Spike in YR pressures observed as temperature was decreased, still look OK. Will leave to settle for a while. T = 114K.

Rates remain stable at ~ 10^2 peak height level.  

02:33

Pressures stabilised

Setpoint to 113 K. 

02:40

No pressure spike observed after decrease

Setpoint to 112 K

02:46

No pressure spike observed after decrease

Setpoint to 111 K

Pressure spike observed  in YR pressures (smaller than last) - give time to recover. 

03:00

Setpoint to 110 K

No pressure spike observed. 

Rutherford rate peak height remains stable at ~ 10^2 . Perhaps peak height minimum is consistently higher than before, difficult to say. 

Attachment 1 - 115 K

Attachment 2 - spike 1

Attachment 3 - spike 2

All pressure stable now