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--- projects:stm:log [2025/06/15 19:03] – [Day 2025-06-15 (rahix)] rahix
+++ projects:stm:log [2025/06/16 07:51] (current) – [Day 2025-06-15 (rahix)] rahix
@@ Line 57: / Line 57: @@
 It seems the noise has increased since yesterday.  We don't have values from before, but right now, seeing ~80mV of noise overlayed over the tunneling current signal.
+After some time, the control loop settled down quite a bit, assumingly because process disturbances decreased for some unknown reason:
+{{:projects:stm:2025-06-15_20-56.png?400|}}
+{{:projects:stm:2025-06-15_21-00.png?400|}}
+{{:projects:stm:2025-06-15_21-01.png?400|}}
+Managed to increase the setpoint current to 456pA:
+{{:projects:stm:2025-06-15_21-05_1.png?400|}}
+Finally tried putting the lid onto the STM for noise shielding, but I think I crashed the tip way too hard during the process as I couldn't achieve stable tunneling again afterwards...
+Should create a new tip next time and then retry more gently.  Also X/Y control is probably a good next step.
 ==== Day 2025-06-14 (rahix, k8ik, hugo, q3k, ln, zoe) ====