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\begin{titlepage}
\begin{Large}
\hspace*{13.0cm}
\parbox[t]{50mm}{
{\bf Version 1.1.3}\hfill\\
{\bf 28.05.1999}\hfill\\
}
\end{Large}
\vspace{10mm}

\begin{center}
\fbox{\rule[-15mm]{0mm}{18mm}
\parbox{150mm}{
\begin{center}
{\Huge\bf Quality Assurance and Control} \\
\hfill \\
{\Huge\bf Reference Document} \\
\hfill \\
\hfill \\
\hfill \\
{\LARGE\bf for ATLAS MDT Chamber Construction} \\
\end{center}
}}
\vspace{60mm}


\noindent
{\Large\bf  Lists of required quality control tests}

\vfill                                                                                                                                        
{\Large\bf Comments to: Task Owner QA/QC Procedures 

(kroha@mppmu.mpg.de)}
\end{center}
\clearpage
\pagestyle{empty}

\vbox to \textheight{\vfill}
\clearpage

\end{titlepage}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\begin{sidewaysfigure}
%\begin{table}[p]
\renewcommand{\arraystretch}{0.90}

\begin{center}
\noindent
{\bf Table~1:} Quality control tests of drift tube materials at the chamber production sites 
\vspace{2mm}

\begin{tabular}{lllcl}

\hline\hline   
& & & &\\
{\bf Test} & {\bf Acceptance criteria} & {\bf Reaction if failed} & {\bf Data base} & {\bf Comment} \\ [1mm]
\hline

& & & &\\
\multicolumn{5}{l}{\bf Aluminum tube} \\ [1mm]

Visual inspection      & no obvious defects or holes, proper cleaning, & reject tube,    & central & 1: sample test/box \\
of inside and outside  & deburring, straightness, bar code, packing & notify supplier &         & 2: every tube before wiring \\
& & & &\\

Outer diameter envelope,   & $29970\pm 15~\mu$m & reject box & central & sample test/box \\
from 8 points on circumference   &               &  & &\\
& & & &\\

Wall thickness,   & $400\pm 30~\mu$m & reject box & central & sample test/box \\
at 8 points on circumference   &               &  & &\\
& & & &\\

Length $L$     & $L\pm 0.5$~mm ($L\le 4$~m) & reject box & central & sample test/box \\
               & $L\pm 0.7$~mm ($L >  4$~m) & & &\\
& & & &\\

Straightness   & insertion into jig   & reject tube, & central & sample test/box \\
               & without difficulties & notify supplier & & \\
\hline

& & & &\\
\multicolumn{5}{l}{\bf Wire} \\ [1mm]

Visual inspection & no defects of gold-plating,      & reject spool & central & 1: first meters and every 400~m \\
                  & proper cleaning, no kinks        &              &         & \hphantom{1:} per spool under microscope, \\
                  &                                  &              &         & 2: inspection during wiring \\
& & & &\\
\hline

& & & &\\
\multicolumn{5}{l}{\bf Endplug} \\ [1mm]

Visual inspection & proper cleaning and no obvious defects  & reject endplug, & central & 1: sample test/batch \\
                  & of plastic, O-rings, wire locator,      & notify supplier &         & 2: each endplug before wiring \\
                  & Al reference surface, crimp tube        & & &\\
& & & &\\

Outer diameter envelope,         & $30010\pm 10~\mu$m & reject batch & central & sample test/batch \\
from 8 points on circumference   &                    &              &         &            \\
({\bf optional}) & & & &\\                                                                                                                 
& & & &\\

Wire locator outer diamter       & within tolerance   & reject batch & central & sample test/batch \\
& & & &\\
\hline\hline

\end{tabular}
\end{center}

%\end{tabular}
\end{sidewaysfigure}
\clearpage


\begin{sidewaysfigure}
\renewcommand{\arraystretch}{1.10}

\begin{center}
\noindent
{\bf Table~2:} Quality control tests of drift tubes at the chamber production sites
\vspace{2mm}

\begin{tabular}{lllcl}

\hline\hline
& & & &\\
{\bf Test} & {\bf Acceptance criteria} & {\bf Reaction if failed} & {\bf Data base} & {\bf Comment} \\ [1mm]
\hline

& & & &\\
\multicolumn{5}{l}{\bf Drift tube} \\ [1mm]

Visual inspection     & no obvious damage of tube or endplug,     & reject drift tube,      & local & each tube after wiring,\\
                      & no visible defects of tube and            & adjust wiring station   &       & before chamber assembly \\
                      & wire crimp, tube correctly sealed & & &\\
& & & &\\

Aluminum tube outer & less than 30.020~mm  & reject drift tube,   & local & sample test/day,  \\
diameter envelope   &                      & adjust tube crimping &       & shortly after wiring  \\
in endplug region   &                      & setup                & &\\
& & & &\\

Aluminum tube outer & less than 30.010~mm  & reject or repair tube, & local & sample test/day,  \\
diameter envelope   &                      & adjust tube crimping   &       & after laser welding \\
at tube end         &                      & or laser welding setup & &\\
& & & &\\

Length $L$     & Nominal length $\pm 0.25$~mm  & reject drift tube,    & local & 1: sample test/day \\
               & at $20\pm 1^\circ$C    & adjust wiring station &       & 2: each tube on chamber assembly jig \\
& & & &\\

Relative azimutal        & $\pm 10$~mrad  & reject drift tube,    & local & 1: sample test/day \\
orientation of endplugs  &                & adjust wiring station &       & 2: each tube on chamber assembly jig \\
& & & &\\

Straightness    & insertion into jig     & reject drift tube & local & 1: sample test/day  \\
                & without difficulties   &                   &       & 2: each drift tube during chamber assembly \\
& & & &\\

Tube ground contact  & less than 100~m$\Omega$ & repeat laser welding & local & 1: sample test/day  \\
resistance           & per endplug             &                      &       & 2: monitoring of selected tubes over time \\
(for 5~mA current)   & & & &\\
& & & &\\
\hline\hline

\end{tabular}
\end{center}

\end{sidewaysfigure}
\clearpage


\begin{sidewaysfigure}
%\begin{table}[p]
\renewcommand{\arraystretch}{0.90}

\begin{center}
\noindent
{\bf Table~3:} Quality control tests for all drift tubes at the chamber production sites
\vspace{2mm}

\begin{tabular}{lllcl}

\hline\hline
& & & &\\
{\bf Test} & {\bf Acceptance criteria} & {\bf Reaction if failed} & {\bf Data base} & {\bf Comment} \\ [1mm]
\hline

& & & &\\
\multicolumn{5}{l}{\bf Drift tube} \\ [1mm]

Room temperature & $20\pm 2^\circ$C & adjust & local & during tube tests \\
& & & &\\

Relative humidity      &                   &        & local & monitoring    \\
({\bf optional}) & & & &\\
& & & &\\

Temperature of tube & $20\pm 1^\circ$C & adjust temperature & local & during tube assembly \\
                    &                   & or tension         & &\\
& & & &\\

Temperature of tube & known within $\pm 1^\circ$C & repeat measurement & central & during wire tension measurement \\
& & & &\\

Wire tension             & within $\pm 5\% $      & reject drift tube & central  & 1: shortly after tube wiring \\
(from oscillation        & of the nominal value   &                   &          & 2: after min.\ two weeks, before assembly \\
frequency meas.)         & at $20\pm 1^\circ$C   & & &\\
& & & &\\

Wire location      & within $\pm 25~\mu$m of the & reject drift tube,  & central & sample test on day of wiring, \\
at the tube ends   & center of the endplug ref.  & inspect endplugs and  & & tube held as in assembly jig, \\
                   & surface in $y$ and $z$       & wiring station        & & incl.\ test of coaxiality of endplugs, \\
& & & & measurements at 0 and $180^\circ$   \\
& & & &\\

Gas pressure test      & no obvious leaks  & reject drift tube,     & local & \\
at 3 bar overpressure  &                   & inspect endplugs,      & &  \\
                       &                   & adjust wiring station  & &  \\
& & & &\\

Gas leak rate             & less than $10^{-8}$~bar~l/s & reject drift tube, &  central & after pressure   \\
at 2 bar overpressure     &                            & inspect endplugs,     & & test  \\
& & adjust wiring station & &\\
& & & &\\

HV stability test: & less than 2~nA/m & reject drift tube,             & central  & with Ar:CO${}_2$ (93:7) at 3 ~bar \\
leakage current    &                  & inspect endplugs, tubes, wire  &          & and 3400~V  \\
& & & &\\                                                                                                                  

HV stability test: & within $\pm 3\sigma$  & reject drift tube, & central   & with Ar:CO${}_2$ (93:7) at 3 bar \\
cosmic count rate  & of nominal value      & inspect endplugs, tube, wire   &  & and 3190~V     \\
({\bf optional}) & & & & \\
& & & &\\

\hline\hline

\end{tabular}
\end{center}

%\end{table}
\end{sidewaysfigure}
\clearpage

\renewcommand{\arraystretch}{0.95}
\begin{sidewaysfigure}

\begin{center}
\noindent
{\bf Table~4:} Drift tube test equipment at the production sites
\vspace{2mm}

%\begin{footnotesize}

\begin{tabular}{|l|l|l|l|l|l|} \hline\hline
{\bf Site} & {\bf Wire tension}      & {\bf Wire position} & {\bf Leak rate}    & {\bf HV test}           & {\bf HV test}  \\
           & {\bf (osz.\ frequency)} &                     & {\bf (whole tube)} & {\bf (leakage current)} & {\bf (cosmic rate)} \\ \hline

{\bf Freiburg} & Excitation in B-field & Brandeis X-ray & As Frascati             & HV system with & Yes \\
               &                       & system         &                         & pA-meter       &     \\
\hline

{\bf LMU/MPI}   & CAEN SY502 meter,      & Brandeis X-ray  & Pressure rise in evacuated       & HV system with   & BNL preamp., \\
(accept.\ test) & excitation in B-field  & system, MPI jig & volume at endplug (8 tubes sim.) & 1~nA sensitivity & shaper       \\
\hline

{\bf NTU Athens} & CAEN SY502 meter,     & Electromagnetic, & As Frascati or Pavia          & Keithley current meter & \\
                 & excitation in B-field & as Pavia, Rome   &                               & with 1~nA sensitivity  & \\
\hline

{\bf Univ.\ Athens} & \multicolumn{5}{c|}{as NTU Athens} \\
 & \multicolumn{5}{c|}{        (after module~0)} \\ \hline

{\bf Thessaloniki} & excitation in B-field & & & CAEN SY127 (40 channels), & \\
(accept.\ test) & & & & 1~nA sensitivity HV system & \\ \hline

{\bf Frascati} & Electrostatic excit.,      & Electromagnetic  & Helium leak detector,      & CAEN SY546 (96 channel)     & Yes \\
               & multi-channel system,      & micrometer,      & 60 single-tube containers  & 1~nA sensitivity HV system, &  \\
               & integration with leak test & as Pavia, Rome   &                            & integration with leak test  &  \\
\hline

{\bf Cosenza}  & CAEN SY502 meter,          & Electromagnetic  & As Pavia,                  & CAEN SY546 (96 channel)      & \\
               & excitation in B-field      & micrometer,      & automatic control system   & 1~nA sensitivity HV system,  & \\
               & integration with leak test & as Pavia, Rome   &                            & integration with leak test   &  \\
\hline

{\bf Pavia}    & As Rome                    & Electromagnetic  & Argon mass spectrometer,   & HV system (10 channels)      &  \\
               &                            & micrometer       & 10 single-tube containers  & with pA-meter,               &  \\
               &                            &                  & (commercial system)        & integration with leak test   &  \\
\hline

{\bf Rome}     & Excitation in B-field,     & Electromagnetic  & As Frascati or Pavia,      & As Pavia & \\
               & multi-channel              & micrometer       &                            &          &  \\
\hline

{\bf NIKHEF}   & Mechanical excitation,     & Electromagnetic, & As Frascati                 & Multi-channel HV system,   & Yes \\
               & piezo-electric measurement & as Pavia/Rome    &                             & integration with leak test &     \\
\hline

{\bf Dubna}    & Excitation in B-field, & Brandeis X-ray   & Helium mass spectrometer,       & CAEN SY546 (96 channel) & BNL preamp., \\
(also for MPI) & meter custom design    & system, MPI jig  & multi/single-tube containers    & 1~nA sensitivity HV system & shaper  \\
\hline

{\bf Protvino} & Excitation in B-field, & Brandeis X-ray   & Mass spectrometer &  &  \\
               & meter custom design    & system           &                   &  &  \\
\hline

{\bf Boston}   & Excitation in B-field, & Brandeis X-ray   & Mass spectrometer,   & Multi-channel HV system,   & Yes \\
               & meter custom design    & system           & multi-tube container & integration with leak test &     \\
\hline

{\bf Michigan} & As Seattle             & Electromagnetic  & Helium leak tester,         & Multi-channel HV system  &   \\
               &                        & micrometer,      & evacuated volume at end-    &  & \\
               &                        & as Pavia, Rome   & plug and moving along tube  &  & \\
\hline

{\bf Seattle}  & Excitation in B-field, & Electromagnetic, & As Michigan  & As Michigan  &  \\
               & meter custom design    & as Pavia/Rome    &              &  &   \\
\hline\hline
\end{tabular}
\end{center}

%\end{footnotesize}

\end{sidewaysfigure}
%
\clearpage


\begin{sidewaysfigure}
%\begin{table}[p]
\renewcommand{\arraystretch}{1.10}

\begin{center}
\noindent
{\bf Table~5:} Quality control tests during chamber assembly.
\vspace{2mm}

\begin{tabular}{lllcl}

\hline\hline
& & & &\\
{\bf Test} & {\bf Acceptance criteria} & {\bf Reaction if failed} & {\bf Data base} & {\bf Comment} \\ [1mm]
\hline

& & & &\\
\multicolumn{5}{l}{\bf Environment} \\ [1mm]

Room temperature       & $20\pm 1~\circ$C & adjust & local & before glueing \\
& & & &\\

Relative humidity      & $50\pm 10~\%$     & adjust & local & before glueing \\
& & & &\\

Atmospheric pressure   &                   &        & local & monitoring     \\
({\bf optional}) & & & &\\
& & & &\\

Temperature of outer cross plates & $20\pm 0.5^\circ$C & adjust & local & uniform, before glueing \\
& & & &\\

Temperature of end combs & $20\pm 0.5^\circ$C & adjust & local & uniform, before glueing \\
& & & &\\

Temperature difference & $<0.5^\circ$C & adjust & local & during glueing \\
outer cross plates--end combs  & & & &\\
\hline

& & & &\\
\multicolumn{5}{l}{\bf Spacer assembly} \\ [1mm]

Glue gaps between tube layer & $200-1000~\mu$m  & adjust & local & both orientations of cross plates \\
on combs and cross plates    &                  &        &       & around $z$-axis                  \\
& & & &\\
\hline

& & & &\\
\multicolumn{5}{l}{\bf On-chamber gas system} \\ [1mm]

Leak rate  & less than $10^{-6}$~bar~l/s  & repair or replace & local & for preassembled gas manifolds \\
& & & &\\

Flow rate/tube  & equal within $10\%$  & repair or replace & & for preassembled gas manifolds \\
& & & &\\
\hline\hline

\end{tabular}
\end{center}

%\end{table}
\end{sidewaysfigure}
\clearpage


\begin{sidewaysfigure}
%\begin{table}[p]
\renewcommand{\arraystretch}{0.90}

\begin{center}
\noindent
{\bf Table~6:} Quality control tests during chamber assembly (cont.)
\vspace{2mm}

\begin{tabular}{lllcl}

\hline\hline
& & & &\\
{\bf Test} & {\bf Acceptance criteria} & {\bf Reaction if failed} & {\bf Data base} & {\bf Comment} \\ [1mm]
\hline

& & & &\\
\multicolumn{5}{l}{\bf Assembly of tube layers} \\ [1mm]

Vacuum suction  & at nominal value & adjust & local & tube positioning on combs during glueing  \\
underpressure   & & & &\\
& & & &\\

Horizontal gaps between tubes  & not more than two adjacent     & relocate drift tubes & local & before glueing \\
                               & tube walls touching,           & & &\\
                               & no adjacent endplugs touching  & & &\\
& & & &\\

Height of endplug              & within $\pm 20~\mu$m           & relocate drift tubes & local & before glueing \\
reference surfaces on jig      & of nominal value in $y$        & & &\\
& & & &\\

Stability of in-plane          & within $\pm 10~\mu$m            & adjust               & central & after each glueing step \\
monitor readings               & of nominal value in $y$ and $z$ &                      &         & (definition of zero of in-plane monitors), \\
(image displacement) & & & & after correction for middle \\

Sphere locations               & within $\pm 10~\mu$m            & adjust               & local   & before each glueing step, \\
                               & of nominal value in $y$ and $z$ &                      &         & with sphere and in-plane monitors \\
& & & &\\

Outer cross plate sags         & zero within $\pm 10~\mu$m       & adjust               & local & before glueing of a layer, \\
on the assembly table          & & & & measured with temporary        \\
({\bf optional})               & & & & cross plate sag monitors \\
& & & &\\

Middle cross plate sag         & zero within $\pm 20~\mu$m       & adjust               & local & before glueing of a layer, \\
on the assembly table          & & & & measured with in-plane monitors plus \\
({\bf optional})               & & & & outer cross plate sag correction \\
& & & &\\
\hline

& & & &\\
\multicolumn{5}{l}{\bf Alignment Platforms} \\ [1mm]

Angular alignment of    & within $\pm 60~\mu$rad, $\pm 200~\mu$rad,   & store data  & central & after each glueing step (initially);   \\
axial/praxial platforms & $\pm 80~\mu$rad around $x$-, $y$-, $z$-axes &             &         & tolerances include accuracy of recon-   \\
                        & with chamber coord.\ axes, orthog.          &             &         & struction of thermal and gravitational  \\
                        & $\pm 100~\mu{\mathrm rad}\times$~cross plate length&      &         & deformations with the in-plane system  \\
& & & &\\

Angular alignment of    & within $\pm 200~\mu$rad, $\pm 80~\mu$rad,   & store data  & central & tolerances include accurcay of recon-  \\
projective platforms    & $\pm 80~\mu$rad around $x$-, $y$-, $z$-axes &             &         & struction of thermal and gravitational  \\
                        & with chamber coordinate axes                &             &         & deformations with the in-plane system   \\
& & & &\\
\hline\hline

\end{tabular}
\end{center}

%\end{table}
\end{sidewaysfigure}
\clearpage


\begin{sidewaysfigure}
%\begin{table}[p]
\renewcommand{\arraystretch}{1.10}

\begin{center}
\noindent
{\bf Table~7:} Quality control tests of all assembled chambers at the production sites
\vspace{2mm}

\begin{tabular}{lllcl}

\hline\hline
& & & &\\
{\bf Test} & {\bf Acceptance criteria} & {\bf Reaction if failed} & {\bf Data base} & {\bf Comment} \\ [1mm]
\hline


& & & &\\
\multicolumn{5}{l}{\bf Mechanical Tests} \\ [1mm]

Sag of chamber &  & store data & central & $y$ readings of  \\
on kinematical supports & & & & in-plane monitors \\
before sag compensation   & & & &  \\
& & & &\\

Sag of chamber            & within $\pm 20~\mu$m  & adjust sag compensation  & central & $y$ readings of  \\
on kinematical supports   & of nominal wire sag   & until within tolerance,  & & in-plane monitors \\
after sag compensation    &                       & store data               & &  \\
& & & &\\

Deformation of cross plates  & $<20~\mu$m  & store data & central & with temporary cross \\
on kinematical supports      & & &                                & plate sag monitors \\
({\bf recommended for BM, BO}) & & & & and FEA model \\
& & & &\\

Rel.\ angular alignment of & see Table~6   & store data  & local & tolerances include accuracy of recon-  \\
alignment  platforms       &               &             &         & struction of thermal and gravitational  \\
on kinematical supports    &               &             &         & deformations with the in-plane system    \\
after sag compensation,    & & &                                   & (measurements as during assembly) \\
with 1 and 3 bar pressure  & & & & \\

\hline\hline

\end{tabular}
\end{center}
\hfill

%\end{table}
\end{sidewaysfigure}
\clearpage


\begin{sidewaysfigure}
%\begin{table}[p]
\renewcommand{\arraystretch}{0.95}

\begin{center}
\noindent
{\bf Table~8:} Quality control tests of all assembled chambers at the production sites (cont.)
\vspace{2mm}

\begin{tabular}{lllcl}

\hline\hline
& & & &\\
{\bf Test} & {\bf Acceptance criteria} & {\bf Reaction if failed} & {\bf Data base} & {\bf Comment} \\ [1mm]
\hline

& & & &\\
\multicolumn{5}{l}{\bf Operation Tests} \\ [1mm]

Gas pressure test      & test done,        & repair gas manifold,   & central  &   \\
at 3 bar overpressure  & no obvious leaks  & repair/disconnect      &          &                   \\
                       &                   & faulty tubes, store ID &          &                   \\
& & & &\\

Gas leak rate         & less than $2\times 10^{-8}$~bar~l/s  & repair gas manifold, & central & after pressure  \\
at 2 bar overpressure & per tube                             & repair/disconnect    &         & test       \\
                      &                                      & faulty tubes, store ID &       &        \\
& & & &\\

HV stability:   & less than 2~nA/m~$+5$~nA & replace electronics  & central & with installed electronics boards,  \\
leakage current & per channel            & boards; identify,    &         & baseline gas at 3 bar \\
                &                        & sputter/disconnect   &         & and nominal and $8\times$ nominal   \\
                &                        & faulty drift tubes,  &         & gas gain                            \\
                &                        & store ID             & &\\
& & & &\\

HV stability:     & within $\pm 3\sigma$     & identify noisy       & local   & with installed electronics boards,  \\
cosmic count rate & of nominal value         & channels,            &         & baseline gas at 3 bar \\
({\bf optional})  &                          & store ID             &         & and nominal gas gain  \\
& & & &\\

Operation in    & evaluation of performance: & make chamber     & local   & with test electronics,  \\
cosmic ray test & noise level, efficiency,   & operational,     &         & baseline gas at 3 bar   \\
stand           & random rate, max.\ drift time,  & store ID of &         & and nominal gas gain    \\
                & resolution vs.\ $x$, uniformity, & faulty tubes & & \\
                & local wire displacement,   & & &\\
                & stable performance of all  & & &\\
                & channels over 1--2 weeks   & & &\\
& & & &\\

Wire location    & no systematic deviations   & store wire location         & central & track reconstruction \\
measurement      & from expected wire grid    & data incl.\ meas.\ errors,  &         & in cosmic ray tower  \\
with cosmic rays &                            & adjust assembly tooling     &         &  \\
({\bf optional}) &                            &                             & & \\
& & & &\\
\hline\hline

\end{tabular}
\end{center}
\hfill

%\end{table}
\end{sidewaysfigure}
\clearpage


\begin{sidewaysfigure}
%\begin{table}[p]
\renewcommand{\arraystretch}{1.10}

\begin{center}
\noindent
{\bf Table~9:} Quality control tests of all assembled chambers after transport to CERN and during storage
\vspace{2mm}

\begin{tabular}{lllcl}

\hline\hline
& & & &\\
{\bf Test} & {\bf Acceptance criteria} & {\bf Reaction on failure} & {\bf Data base} & {\bf Comment} \\ [1mm]
\hline

& & & &\\
Visual     & no visible damage  & perform possible      &   & acceptance test after transport  \\
inspection &                    & repairs, mark chamber &   & to CERN  \\                                                                     
           &                    & for X-ray tomograph   &   &          \\
           &                    & and full leak test    &   &          \\
& & & &\\

Gas leak rate & less than $2\times 10^{-8}$~bar~l/s per tube & repair gas manifold, & central & 1: full leak test for one chamber per \\
at 3 bar      &                                              & repair/disconnect    &         & transport to CERN (acceptance test)  \\
              &                                              & faulty tubes, store ID &       & or if visible damage of chamber \\
              &                                              &                        &       & 2: monitoring of pressure (at known \\
              &                                              &                        &       & temperature) over storage time \\
& & & &\\

HV stability:   & less than 2~nA/m~$+5$~nA & replace electronics  & central & after mounting of final electronics, \\
leakage current & per channel              & boards; identify,    &         & with baseline gas at 3 bar and            \\
                &                          & disconnect faulty    &         & nominal and $2\times$ nominal  \\
                &                          & tubes, store ID      &         & gas gain     \\
& & & &\\
Operating test  & evaluation of performance: & replace electronics, & local   & after mounting of final electronics, \\
                & pulser test (correct       & make chamber         &         & with baseline gas at 3 bar           \\
                & connections), signals      & operational          &         & and nominal operating conditions     \\
                & from all channels, noise   &                      &         &                                      \\
                & level, random rate, uniformity &                  &         &                                      \\
& & & &\\

\hline\hline

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\noindent
{\bf Table~10:} Quality control tests of selected chambers from each production site after transport to CERN and during storage
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\begin{tabular}{lllcl}

\hline\hline
& & & &\\
{\bf Test} & {\bf Acceptance criteria} & {\bf Reaction on failure} & {\bf Data base} & {\bf Comment} \\ [1mm]
\hline
& & & &\\

Wire location   & $\pm 20~\mu$m rms in $y$ and $z$ & store wire location & central & 1: sample test/production site \\
measurement with& with respect to the    & data and chamber ID,          &         & 2: for chambers with expected  \\
X-ray tomograph & expected wire grid     & adjust assembly tooling&         & \hphantom{2:} mechanical problems \\
(incl.\ location&                        & in case of deviations, &         &                         \\
of wire on the  &                        & measure chambers since &         &                         \\
alignm.\ platforms) &                    & problem first detected &         &                         \\

& & & &\\
Wire tension      & within $\pm 5\%$      & store data,               & central & for one chamber/production site  \\
(from oscillation & of the nominal tension& notify production sites,  &         & at regular intervals over storage time \\
frequency meas.)  & value at given        & measure other chambers    &         & (temperature meas.\ to $\pm 1^\circ$C) \\
                  & temperature           & & &\\
& & & &\\

Tube ground        & less than 100~m$\Omega$  & store data,               & central & for one chamber/production site  \\
contact resistance & per endplug              & notify production sites,  &         & at regular intervals over        \\
(for 5~mA current) &                          & measure other chambers    &         & storage time                     \\
& & & &\\

\hline\hline

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