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\title{Commissioning and operations plan}

\author[Sho Uemura]{Sho Uemura}
\institute{Tel Aviv University\\for the SENSEI Collaboration}
\date[July 28, 2021]

%\titlegraphic{
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\begin{document}

%\setcounter{framenumber}{2} 
\begin{frame}
    \titlepage
\end{frame}

%agenda:
%response to IRR
%commissioning+ops
%ops procedures
%quality+emergency response plans
%health/safety + hazard management plans

%The ORR meeting is relatively short with a focus on Operations (normal and emergency conditions) and hazard management.
%
%Avoid background information on the experiment as this was previously presented (the committee members are all familiar with SENSEI).
%
%General questions worth noting through presentations:
%
%Verify the actual installation matches the planned installation (photos help – I’ve asked the installation team to grab some new photos)
%If any changes were made, are the changes significant, documented?
%I don’t think there were any major changes
%Do we have as-built drawings?
%Drawings are not necessarily as-built owing to the relatively small scope of SENSEI, quality management plan (including trial assembly and system test at Fermilab) used to confirm apparatus was made as-per drawings
%Are the operating procedures fit-for-purpose
%Walk through the operating procedure and emergency procedures – highlight that the experiment has only a few key pieces of energized equipment, is straightforward to shut down, review any potential risks to detectors if experiment is shut down (and special precautions etc).
%If somebody were to walk by an obviously malfunctioning apparatus, what should they do?
%What does normal operation look/sound/smell like (important for SNOLAB LRCs who walk through lab start of every shift)

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\begin{frame}{Commissioning and operations}
    \begin{itemize}
        \item Commissioning:
            \begin{itemize}
                \item Verify CCDs and DAQ are in good working condition
                \item Measure high-energy background
                \item Measure and optimize readout-related backgrounds
            \end{itemize}
        \item Operations:
            \begin{itemize}
                \item Collect the full SENSEI dataset of O(100) gram-years
                \item Measurements of event rates in the 1--5 $e^-$ charge bins
            \end{itemize}
    \end{itemize}
\end{frame}

\begin{frame}{Planned upgrades}
    \begin{itemize}
        \item Inside the vessel:
            \begin{itemize}
                \item We will start operations with 10 CCDs, the vessel is designed to hold up to 48 and so we plan to add additional CCDs
                \item We will install additional CCDs in 2-3 stages over the next year --- balancing the physics benefit of adding detector mass with the time and effort of opening the shield and vessel
            \end{itemize}
        \item Outside the vessel:
            \begin{itemize}
                \item Adding CCDs will mean expanding the DAQ (need 1 LTA board per CCD)
                \item We may make changes (replacing LTA adapters) to improve the readout-related backgrounds
            \end{itemize}
        \item This work is similar to the installation, and as such can be done by SNOLAB personnel or SENSEI collaboration
    \end{itemize}
\end{frame}

\begin{frame}{Operations team}
    \begin{itemize}
        \item I will coordinate operations for the collaboration
        \item Data monitoring: I will coordinate, but various SENSEI institutions will contribute
            \begin{itemize}
                \item Data will be transferred nightly to Fermilab
            \end{itemize}
        \item Engineering support: Greg Derylo (and Fermilab in general)
    \end{itemize}
\end{frame}

%\begin{frame}{The SENSEI CCDs}
%    \begin{columns}
%        \column{0.5\textwidth}
%        \begin{itemize}
%            \item High-resistivity silicon $675$ $\mu$m thick (no backside thinning), active area $1.59\times 9.42$ cm$^2$ (1.925 grams)
%            \item $6144\times 886$ pixels (split in 4 quadrants), 15 $\mu$m pitch
%            \item Largely identical to DAMIC
%                \begin{itemize}
%                    \item Same material, processing, pixel geometry
%                    \item Different overall dimensions, readout
%                \end{itemize}
%                %\item Designed by LBNL MSL, fabricated by Teledyne DALSA
%            \item Huge improvements (in dark current and amplifier luminescence) over previous SENSEI CCDs fabricated parasitically on lower-quality silicon
%        \end{itemize}
%        \column{0.5\textwidth}
%        \includegraphics[width=\textwidth]{ccds}
%    \end{columns}
%\end{frame}

%\appendix
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\end{document}
