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--- stm:blog_uhv_stm [2015/01/27 14:21] – galli
+++ stm:blog_uhv_stm [2015/09/16 14:39] (current) – galli
@@ Line 256: / Line 256: @@
 Cryogenic run (February 2014). Operators: F.Galli, Christian Wagner (Juelich), Sumit Tewari (Leiden, JvR), Sasha Vrbica (Leiden, JvR).\\
-SUMIT AND SASHA SUMMERIZE FALL 2013 CRYOGENIC RUN WITH SOME TXT AND NICE PICS!\\
+SUMIT AND SASHA SUMMERIZE 2014 CRYOGENIC RUN WITH SOME TXT AND NICE PICS!\\
-**January 2014 - **\\
+**January 2015 - June 2015**\\
 System warmed up for maintenance and to fix a few shorts which developed over time.
+System develops a leak in the OVC (1st bottom flange) during 1st cool-down in April because of heavy corrosion at the flanges. Repaired.
+Several improvements in the electrical diagram, see attached PDF (Sumit!)
+**July 2015 - Mid-August 2015**\\
+Cool-down. Coarse approach works well with external drive (HV amplifier and Sumit's labview program). Several noise issues improved by previous repairs and improvements. Succesfull drag of atoms with PtIr tips but run interrupted by problem with lead-screw mechanism.
+Repaired by Sumit and Chris.
+**September 2015 - **\\