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\begin{document}
%
\title{ 
Commissioning document of the CLAS12 RICH
}
\author{M. Contalbrigo, V. Kubarovsky, M. Mirazita}
\maketitle
%

\abstract{
This is an integration to the CLAS12 Commissioning Document describing the Commissioning procedure for the RICH detector.
}


\vspace{20mm}

\tableofcontents

%\baselineskip=14pt
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\section{Executive Summary}


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\section{Quality Assurance and System Checkout}


%-------------------------------------------------------
\subsection{Quality Assurance}


%---------------
% MECHANICS


\begin{tabular}{||l|l||} 
\hline
\hline
\multicolumn{2}{||l||}{\bf RICH Mechanic structure survey (EEL124) }\\
\hline
\hline
Description  & 
\begin{minipage}[t]{9.5cm} 
Check of the relative position of the panels forming the RICH structure.\\
The target points installed on the RICH mechanics will be used for the survey.\\
The measured positions must match the ones measured during the assembly test performed at the company.\\
\end{minipage} \\
\hline
Special equipments & 
\begin{minipage}[t]{9.5cm} 
Laser tracker.\\
Faro-arm.\\
\end{minipage} \\
\hline
Softwares &  NA \\
\hline
Manpower and time needed & 2 days \\
\hline
Information to be saved in database & NA \\
\hline
\hline
\end{tabular} 

\vspace{10mm}



%---------------
% MIRRORS 


\begin{tabular}{||l|l||} 
\hline
\hline
\multicolumn{2}{||l||}{\bf RICH Mirrors (EEL-121) }\\
\hline
\hline
Description  & 
\begin{minipage}[t]{9.5cm} 
Check of the accuracy of the spherical mirror surface with spot size and Shack-Hartmann measurements.
\begin{enumerate}
\item{Alignment of the Shack-Hartmann sensor axis.}
\item{Alignment of the mirror axis with respect to the Shack-Hartmann axis.}
\item{Alignment of the light source and photocamera for the spot size measurement.}
\item{Measure the spot size as a function of the distance from the mirror.}
\item{Wave-front measurement with the Shack-Hartmann sensor at the minimum spot size distance.}
\item{Shape of the surface with a CMM.}
\end{enumerate}
\end{minipage} \\
\hline
Special equipments & 
\begin{minipage}[t]{9.5cm} 
Two optical tables.\\
Shack-Hartmann sensor.\\
Point-like source with LED and optical fiber.\\
CCD photocamera.\\
Remotely controlled motors for the alignment of the system.\\
Coordinate Measuring Machine (CMM)\\
\end{minipage} \\
\hline
Softwares & 
\begin{minipage}[t]{9.5cm} 
Linux software for the remote control of the motors and CCD.\\
Root analysis software for the spot size measurements.\\
Shack-Hartmann reconstruction software.\\
\end{minipage} \\
\hline
Manpower and time needed & About 2 days per mirror, based on previous experience\\
\hline
Status & First 4 mirrors tested in June\\
\hline
Information to be saved in database & Radius of the mirrors \\
\hline
\hline
\end{tabular} 

\vspace{10mm}


%---------------
% MIRROR ALIGNMENT


\begin{tabular}{||l|l||} 
\hline
\hline
\multicolumn{2}{||l||}{\bf RICH Mirror alignment (EEL124) }\\
\hline
\hline
Description  & 
\begin{minipage}[t]{9.5cm} 
Verify the relative alignment of the RICH mirrors.\\
Four mirror systems must be aligned:
\begin{enumerate}
\item{the frontal planar panel.}
\item{the lateral planar panel.}
\item{the bottom planar panel.}
\item{the spherical panel.}
\end{enumerate}
The relative alignment of the mirrors composing each panel will be checked first.
Then the panel will be installed in the RICH and its alignment with respect to the others will be checked with optical methods.
The position of the panel can be optimized by acting on the adjusting screws of the three attaching points on the RICH structure.
\end{minipage} \\
\hline
Special equipments & 
\begin{minipage}[t]{9.5cm} 
Laser tracker.\\
Faro-arm.
\end{minipage} \\
\hline
Softwares &  NA \\
\hline
Manpower and time needed & one week \\
\hline
Information to be saved in database &  NA \\
\hline
\hline
\end{tabular} 

\vspace{10mm}


%----------------------
% Aerogel at Washington



\begin{tabular}{||l|l||} 
\hline
\hline
\multicolumn{2}{||l||}{\bf RICH Aerogel: Catholic University (Washington) }\\
\hline
\hline
Description  & 
\begin{minipage}[t]{9.5cm} 
Check of the optical quality of the aerogel tiles \end{minipage}\\
\hline
Special equipments & Spectrophotometer\\
\hline
Manpower and time needed & 
\begin{minipage}[t]{9.5cm} 
About 1 day per 10 tiles, based on previous experience\\
The work is performed at the Catholic University (Washington).\\
\end{minipage}\\
\hline
Status & 10 tiles already tested \\
\hline
Information to be saved in database & Average transparency and refractive index of the tiles \\
\hline
\hline
\end{tabular} 

\vspace{10mm}

%--------------------
% Aerogel at Ferrara



\begin{tabular}{||l|l||} 
\hline
\hline
\multicolumn{2}{||l||}{\bf RICH Aerogel (Ferrara) }\\
\hline
\hline
Description  & 
\begin{minipage}[t]{9.5cm} 
Check of the optical quality of the aerogel on a subsample of tiles
\end{minipage}\\
\hline
Special equipments & 
\begin{minipage}[t]{9.5cm} 
Laser.\\
CCD photocamera.\\
Remotely controlled motors to scan the surface of the tile.\\
\end{minipage} \\
\hline
Manpower and time needed & 
\begin{minipage}[t]{9.5cm} 
About 1 day per tile, based on previous experience\\
The work is performed in Ferrara.\\
\end{minipage}\\
\hline
Status & Started in October 2015 \\
\hline
Information to be saved in database & NA \\
\hline
\hline
\end{tabular} 

\vspace{10mm}

%--------------
% MAPMT



\begin{tabular}{||l|l||} 
\hline
\hline
\multicolumn{2}{||l||}{\bf RICH Multi-Anode PMT }\\
\hline
\hline
Description  & 
\begin{minipage}[t]{9.5cm} 
Characterization of the MAPMT
\end{minipage} \\
\hline
Special equipments & 
\begin{minipage}[t]{9.5cm} 
Pulsed laser source.\\
Flash-ADC.\\
Remote-controlled motors to scan the MAPMT entrance window.\\
\end{minipage}\\
\hline
Status & Completed \\
\hline
Results & \begin{minipage}[t]{9.5cm} 
Measurement of the Single-photon spectrum per each pixel of all the MAPMTs. \\
\end{minipage}\\
\hline
Information to be saved in database & Gain and single photon resolution of each channel at various HV \\
\hline
\hline
\end{tabular} 


\vspace{10mm}

%--------------------------------------------------------
\newtable{Front-End Electronics}
%--------------------------------------------------------

Verify electrical connections and power dissipation. \\

Load the non volatile firmware image via JTAG connection \\ 

Automatized diagnostic and verification of 
\begin{itemize}
\item volatile firmware image;
\item optical communication protocol;
\item preamplification gain, digital threshold, shaping parameters, masked OR configuration;
\item 64 inputs and digital outputs functionality;
\item binary outputs: electronic baseline, saturation, efficiency at 50 fC (1/3 photoelectron); 
\item time resolution ($<$ 500 ps expected) and offsets;
\item charge response in range 50 fC - 1000 fC: linearity and hold-signal time offset.
\end{itemize}

\entry{Special equipments}

Diagnostic board (custom). \\
Injection Board (custom).\\
Pulse generator.\\
Computer with PCIe optical bridge.

\entry{Status}

The task has been completed on the FPGA boards at JLab, and on the pre-production Adapter and Asics boards at Ferrara.

\entry{Manpower and time needed}

2 person, 8 weeks.

\entry{Results}

Minor issues were found on the pre-production Adapter and Asics boards and modifications 
were implemented to fix them in the final production.

\entry{Information to be saved in database}

Digital line parameters: electronic baseline, saturation, efficiency at 50 fC, time offset.

\endtable{10}

%--------------------------------------------------------
\newtable{Photon Detector}
%--------------------------------------------------------

Group MA-PMTs with similar gain and connect to electonic tiles.
Equalize performance in the single-photoelectron regime.

\entry{Special equipments} Pulsed laser test-bench (JLab) 

\entry{Manpower and time needed} 2 persons, 2 months

\entry{Information to be saved in database}

Typical LV and HV currents and voltages, pre-amplification gains, digital thresholds, 
single-photon-signal efficiencies and time-over-thresholds. 

\endtable{10}


%--------------------------------------------------------
\newtable{SSP and DAQ}
%--------------------------------------------------------

Test communication protocol of the RICH FFE with SSP modules:
clock and trigger distribution, readout and event building.

\entry{Manpower and time needed}  1 person, 1 months

\entry{Software} RICH DAQ

\entry{Special equipments} NA

\entry{Dependencies from other systems} CLAS12 DAQ software

\entry{Information to be saved in database} NA

\endtable{10}


%--------------------------------------------------------
\newtable{Slow Control}
%--------------------------------------------------------

Test communication protocol of the RICH Slow Control with 
hardware elements: SSP for DAQ, cRio for gas-system, SY4527 for power supply.

\entry{Manpower and time needed}  1 person, 2 weeks

\entry{Software} RICH Slow Control

\entry{Special equipments} NA

\entry{Dependencies from other systems} CLAS12 DAQ software

\entry{Information to be saved in database} NA

\endtable{10}


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\subsection{System Checkout}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


%--------------------------------------------------------
\newtable{Checkout of Low Voltage System}
%--------------------------------------------------------

Connect the detector to LV supply, verify cable map, switch on single or group of boads, check of current and voltage stability.

\entry{Manpower and time needed}   2 persons, 2 week.

\entry{Software} CLAS12 slow control. 

\entry{Computing resources}   NA 

\entry{Dependencies from other systems} Slow Control and Cooling System are required to turn on the full electronic panel

\entry{Information to be saved in database}
LV translation table, LV typical currents and voltage settings (for reference).

\endtable{10}

%--------------------------------------------------------
\newtable{Checkout of the High Voltage System}
%--------------------------------------------------------


Connect the detector to HV supply, verify cable map, switch on single or group of boards, check of current and voltage stability,
check out dark count rates as a function of HV.

\entry{Manpower and time needed} 2 persons, 2 weeks.

\entry{Software} CLAS12 slow control.

\entry{Computing resources}  NA 

\entry{Dependencies from other systems} LV system is needed to allow for PMT monitoring via dark-count measurements

\entry{Information to be saved in database}
HV translation table, typical current and voltage settings (for reference).

\endtable{10}


%--------------------------------------------------------
\newtable{Checkout of the Slow Control}
%--------------------------------------------------------

Test the RICH slow control for monitoring of FEE tiles via SSP,
gas system via cRio and LV and HV via SY4527 power supply.

\entry{Manpower and time needed}  1 person, 2 months

\entry{Software} RICH slow control

\entry{Computing resources} NA

\entry{Dependencies from other systems} CLAS12 EPICS slow control system

\entry{Information to be saved in database} NA

\endtable{10}


%--------------------------------------------------------
\newtable{Checkout of the Gas Systems}
%--------------------------------------------------------

\begin{enumerate}
\item{Nitrogen lines: gas flow, humidity, leak tests.}
\item{Cooling air lines: gas flow, temperature, humidity, leak tests.}
\end{enumerate}

\entry{Manpower and time needed} 1 person, two weeks

\entry{Software}  RICH Slow Control

\entry{Computing resources}  NA 

\entry{Dependencies from other systems}
RICH Slow Control is required to monitor the condition and system stability

\entry{Information to be saved in database} Typical flow, pressure, humidity and temperature data 

\endtable{10}


%--------------------------------------------------------
\newtable{Checkout of the Interlock System}
%--------------------------------------------------------

Checkout and test of the interlocks between HV, LV, cooling, gas systems

\entry{Manpower and time needed} 1 person, one weeks

\entry{Software} CLAS12 slow control and interlock logic

\entry{Computing resources}  NA 

\entry{Dependencies from other systems}
RICH services (gas systems and power supplies) have to be checked out prior of interlock

\entry{Information to be saved in database} 
Minimum and maximum values for pressure, temperatures and flows 
allowed by the interlock

\endtable{10}

%--------------------------------------------------------
\newtable{Checkout of the Front-End Electronics and DAQ}
%--------------------------------------------------------

Verify ASIC and FPGA configuration, calibration, channel mapping, noise level.
Test different DAQ and trigger configurations.

\entry{Manpower and time needed} 2 person, 2 months

\entry{Software} RICH DAQ and slow control, calibration software

\entry{Computing resources} NA

\entry{Dependencies from other systems}
RICH servives (cooling, power supply, slow control and interlock) should be checked out
in advance

\entry{Information to be saved in database} Channel translation table, calibration data 

\endtable{10}

%--------------------------------------------------------
%\newtable{Checkout of the DAQ and Trigger}
%--------------------------------------------------------
%Test of different DAQ and trigger configurations
%\end{minipage}\\
%\hline
%Manpower and time needed & 1 week \\
%\hline
%Software & CLAS12 slow control and DAQ\\
%\hline
%Computing resources & Computer farm \\
%\hline
%Dependencies from other systems & Need DC information\\
%\hline
%Information to be saved in database & RICH electronics configuration data \\
%\hline
%\hline
%\end{tabular} 
%\vspace{10mm}

%--------------------------------------------------------
\newtable{Cosmic runs with the electronic panel}
%--------------------------------------------------------

Check of the full electronic system.\\
Data will be acquired in two modes with the electronic panel put in horizontal position, with the MAPMT entrance window up:

\begin{enumerate}
\item self-trigger mode to record the charge particle hits in the full active area; 
\item external hodoscope trigger to record the Cherenkov rings produced on an aerogel
tile.
\end{enumerate}

\entry{Manpower and time needed} run in batch mode, two weeks.

\entry{Special equipment} A simple tracking system should be setup in mode 2 for determining the cosmic trajectories.

\entry{Software} RICH DQ and analysis software.

\entry{Computing resources}  Access to batch computing farm. 

\entry{Dependencies from other systems}  Cooling system and interlocks must be on. 

\entry{Information to be saved in database} Time offsets.

\endtable{10}

%--------------------------------------------------------
\newtable{Cosmic Runs with the Assembled RICH}
%--------------------------------------------------------

Check of the RICH response to cosmics.\\
Data will be acquired with the RICH put in horizontal position on its transportation trolley, with the aerogel panel down. 
Cherenkov photons will be produced in the aerogel, then reflected back by the frontal mirror toward the photodetectors.

\entry{Manpower and time needed} run in batch mode, two weeks

\entry{Special equipment} A simple tracking system should be setup for determining the cosmic trajectories.

\entry{Software} RICH DQ and analysis software.

\entry{Computing resources}  Access to batch computing farm. 

\entry{Dependencies from other systems} Cooling system and interlocks must be on. 

\entry{Information to be saved in database} Time offsets.

\endtable{10}


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\section{Commissioning Without Beam}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\subsection{Special Calibration Procedures}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


%--------------------------------------------------------
\newtable{Pedestal Runs}
%--------------------------------------------------------

Determine the baseline of the Front-End electronics

\entry{DAQ configuration and trigger} CLAS12 random or internal pulse generator trigger

\entry{Manpower and time needed} 1 person, 2 hours

\entry{Software} RICH DAQ and calibration software

\entry{Computing resources} Onlinde PC-farm

\entry{Dependencies from other systems} RICH stand alone test

\entry{Information to be saved in database} Pedestals (minimum digital threshold allowable)

\endtable{10}


%--------------------------------------------------------
\newtable{Dark Runs}
%--------------------------------------------------------

Calibration of the Front-End electronics using thermal noise.

\entry{DAQ configuration and trigger} Self-trigger mode

\entry{Manpower and time needed} 1 person, 1 hours

\entry{Software} RICH DAQ and calibration software

\entry{Computing resources} Onlinde PC-farm

\entry{Dependencies from other systems} RICH stand alone test

\entry{Information to be saved in database} Single photo-electron time-over-threshold

\endtable{10}


%--------------------------------------------------------
\newtable{Charge Injection Runs}
%--------------------------------------------------------

Calibration of the Front-End electronics using the internal charge injector

\entry{DAQ configuration and trigger} Internal pulse generator trigger

\entry{Manpower and time needed} 1 person, 1 hours

\entry{Software} RICH DAQ and calibration software

\entry{Computing resources} Onlinde PC-farm

\entry{Dependencies from other systems} RICH stand alone test

\entry{Information to be saved in database} gain and threshold, single p.e. time-over-threshold

\endtable{10}


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\subsection{Calibration with Cosmic Rays}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


%--------------------------------------------------------
\newtable{Cosmic Runs in Hall-B}
%--------------------------------------------------------

Global check of the RICH with cosmics.

\entry{DAQ configuration and trigger} CLAS12 DAQ and trigger for cosmics.

\entry{Manpower and time needed} 1 person, 2 weeks.

\entry{Software} CLAS12 analysis software.

\entry{Computing resources} Access to batch computing farm.

\entry{Dependencies from other systems} CLAS12 tracking system.

\entry{Information to be saved in database} NA

\endtable{10}



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\subsection{Commissioning With Beam}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%




%---------------------------
% RICH calibration with beam

\begin{tabular}{||l|l||} 
\hline
\hline
\multicolumn{2}{||l||}{\bf RICH detector reconstruction calibration }\\
\hline
\hline
Description  &  
\begin{minipage}[t]{9.5cm} 
After initial system checkout, a series of runs with different conditions will be performed.
\begin{enumerate}
\item{Runs at different beam current to study the noise level.}
\item{Runs with torus off to check the detector geometry.}
\item{Runs with different torus magnetic field, including reverse field, to study the performance of the detector.}
\end{enumerate}
\end{minipage}\\
\hline
DAQ configuration and trigger & CLAS12 electron trigger\\
\hline
Manpower and time needed & one day of CLAS12 data taking \\
\hline
Software for analysis of results & CLAS12 tracking and RICH reconstruction software\\
\hline
Computing resources & Access to batch computing farm \\
\hline
Dependencies from other systems & All the CLAS12 detector on \\
\hline
Information to be saved in database & 
\begin{minipage}[t]{9.5cm} 
Several tuning parameters for the RICH reconstruction (background level, tracking resolution, single photon resolution, etc.).
\end{minipage}\\
\hline
\hline
\end{tabular} 


\vspace{10mm}




%---------------------------
% RICH PID with direct light

\begin{tabular}{||l|l||} 
\hline
\hline
\multicolumn{2}{||l||}{\bf RICH detector PID in the direct light case }\\
\hline
\hline
Description  &  
\begin{minipage}[t]{9.5cm} 
Study the Kaon/Pion and Kaon/Proton rejection powers in the case of direct detection of the Cherenkov photons.\\
Production data taken with liquid hydrogen target.\\
Narrow resonances will be used to verify the RICH PID, for example:
\begin{enumerate}
\item{$K_S$ for pions.}
\item{$\phi$ for kaons.}
\item{$\Lambda$ for protons.}
\end{enumerate}
\end{minipage}\\
\hline
DAQ configuration and trigger & CLAS12 electron trigger\\
\hline
Manpower and time needed & few hours of CLAS12 data taking\\
\hline
Software for analysis of results & CLAS12 and RICH reconstruction and PID software\\
\hline
Computing resources & Access to batch computing farm \\
\hline
Dependencies from other systems & All the CLAS12 detector calibrated \\
\hline
Information to be saved in database & 
\begin{minipage}[t]{9.5cm} 
Kaon detection efficiency vs pion and proton contamination.
\end{minipage}\\
\hline
\hline
\end{tabular} 


\vspace{10mm}
 

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\section{Contact Persons}


\begin{tabular}{||c|c|c|c||} 
\hline
\hline
\multicolumn{4}{||l||}{\bf RICH contac persons}\\
\hline
\hline
Name & Affiliation & email  & Area of responsibility\\
\hline
\hline
V. Kubarovsky & JLab & vpk@jlab.org & Hardware/Software \\ 
\hline
M. Contalbrigo & INFN-Fe & mcontalb@fe.infn.it & Hardware/Software  \\
\hline
M. Mirazita & INFN-LNF & mirazita@lnf.infn.it &  Hardware/Software \\
\hline
\hline
\end{tabular} 




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

%
\end{document}
