\subsection{TPC}
{\bf Strength}
\begin{itemize}
\item The TPC has reached stable operation at the design 
value 5.45 kV (equivalent to 5.35 kV in 2004),sufficient 
to visualize Alvarez muons. This voltage could be kept 
in spite of various HV cyclings, gas manipulations and 
movements of the apparatus.
\end{itemize}
{\bf Weakness}
\begin{itemize}
\item There was insufficient time for a controlled tuneup during 
the start phase of run9. This was due to an additional cycle to 
open and modify the tpc in September 05 in order to reach the design voltage.
\item There was also no time left to bake out the tpc in October 05. This 
may have caused a somewhat higher humidity level in run9 as compared to run8.
\item There are from time to time some (not understood) current 
spikes (up to several 100 nA), which did not severely interfere with 
the run program however.
\item There are some (potential) hotspots and noisy wires which necessitate 
continuous and careful surveillance during all operations.
\item There may have been some leakage in the tubes where the protium 
is filled and samples are taken. This leak is not seen in vacuum. 
CHUPS was fortunately able to keep Nitrogen and Oxygen to negligible levels.
\end{itemize}
{\bf Opportunities and Tasks}
\begin{itemize}
\item  Better preparation of tpc by pumping and baking. Pumping 
started on DEC-23-05, baking (110$^{\circ}$~C on the Alu-vessel) on 
JAN-09-06. It shall be continued until end of February when the CHUPS crew appears.
\item Test of humidity prior to run9a with CHUPS and its humidity sensor.
\item Investigation of the potential pressure leak in the filling 
tubes (was it the overpressure valve??).
\item Analysis of reg. Hydrogen data for Alvarez muons. Are we now able 
to evaluate the Deuterium content?
\end{itemize}









