for Fig. 6.5


\caption{Average spatial resolution of MDT (black data points) and sMDT (red data points) 
  drift tubes measured at the GIF as a function of the $\gamma$ background rate using
  standard MDT readout electronics with bipolar shaping. The measurement results agree well 
  with the predictions from detailed simulations of the detector and readout electronics response
  (balck and red curves).
  A further improvement of the sMDT drift tube spatial resolution at high
  background rates and space charge densities can be achieved by
  employing additional fast baseline restoration (BLR) in order to
  suppress signal pile-up effects (blue curve)~\cite{blr1, blr2}. 
  This is, however, not necessary and will not be implemented for Phase-II
  operation.}


for Fig. 6.6:


\caption{Muon detection efficiencies of MDT (black data points) and sMDT (red data points) 
  drift tubes with the nominal electronics deadtime settings of $820\ns$ and $220\ns$, 
  respectively, measured at the GIF as a function of the $\gamma$ background 
  counting rate using standard MDT readout electronics with bipolar shaping.  
  The efficiency is defined as the probability to find a hit on the
  extrapolated track within $3\sigma$ of the drift tube spatial
  resolution ($3\sigma$ efficiency).  The measurement results agree
  well with the expectations from detailed simulations of detector and
  electronics response (black and red curves). Note that for the same tube length and 
  background fluence, MDT tubes experience twice higher counting rates than sMDT tubes
  as the $\gamma$ rays interact with the drift tubes mainly by conversion in the tube walls. 
  A further improvement of the efficiency of
  the sMDT drift tubes at high background counting rates is possible
  by employing baseline restoration (BLR) circuits in order to suppress signal 
  pile-up effects (blue dashed curve)~\cite{blr1,blr2}. This is, however, 
  not necessary and will not be implemented for Phase-II operation.}
  
for Fig. 6.12  
  
  
\caption{Glue distribution between adjacent tubes of a tube layer
  during BMG chamber assembly (second multilayer) using an automated
  glue dispenser. All glue types used 
  for the assembly of the sMDT chambers (two-component epoxy resins; see text) have been
  tested and certified for radiation resistance up to the maximum exposure
  expected at HL-LHC.}

  
for Fig. 6.13:


\caption{Drawing of the precision jigging for the BIS78 and BIS1--6
  chamber construction and illustration of the steps of the assembly
  procedure.  The brackets for the precise mounting of the alignment
  sensor platforms are an integral part of the jigging design.  The
  platforms for endcap alignment sensors connecting to the NSWs are
  mounted on the bottom of the first multilayer in the first assembly
  step and are only present for BIS78. The axial, praxial, and CCC
  barrel alignment sensors (see section 6.3.1) are mounted, together with the in-plane
  alignment system, on the outside of the top multilayer at the end of
  the chamber assembly.}


for Fig. 6.21:


\caption{Schematics of the gas distribution system of the BIS78 and
  BIS1--6 sMDT chambers (left: 3D model, right: cross section).  The
  concept is the same as for the BME and BMG chambers. It uses
  injection molded plastic gas connectors made of Crastin S600F20
  (PBTB), the same materials as used for the endplug plastic
  parts~\cite{BMGconstr} (Fig.~\ref{fig:endplug1}), to connect the
  tubes in columns perpendicular to the chamber plane to the aluminum
  gas bars mounted along each multilayer on the HV and RO side.
  All plastic materials used for the endplugs and gas systems (see text) 
  as well as the O-ring material have been tested and certfied for radiation 
  resistance up to the maximum exposure expected at HL-LHC.}
  
  
  
  
  