appendix describing drspine parameters

\include{whatabout4pointecho_ins}

\include{reduction_parameters}

\end{appendices}

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\section{Program Parameters}

% ========================================================================================

\subsection{Data Reduction}

The reduction parameters are defined in {\tt sources/drspine\_parameters.f90}:

\begin{verbatim}

type(reduction_pars_struct) :: reduction_parameters

\end{verbatim}

\noindent\begin{tabular}{|l|l|p{3.00in}|}

\hline

{\bf Name}              & {\bf Default Value} & {\bf Comment}                         \\

\hline

{\tt r.min\_counts}     & %{\tt min\_counts\_per\_pixel} &

                        100.0       & minimum number of counts per pixel            \\

\hline

{\tt r.min\_sigma}      & %{\tt min\_sigma\_relative} &

                        0.03        & minimum “wiggle” to be considered for fitting \\

\hline

{\tt r.ave\_min}        & %{\tt average\_min\_value} &

                        0.0         & minimum value for echo average (new parameter) \\

\hline

{\tt r.ave\_maxdev}     & % {\tt average\_max\_deviation} &

                        0.25        & maximum echo average deviation from $(up+down)/2$ \\

\hline

{\tt r.fqt\_min}        & % {\tt fqt\_min\_value}  &

                        0.10        & minimum value of F(Q,t)      \\ % replaces r.min\_amplitude \\

\hline

{\tt r.fqt\_maxsigma}   & % {\tt fqt\_max\_sigma} &

                        1.0         & maximum $\sigma_{F(Q,t)}/F(Q,t)$ ?? $\sigma^2$ \\ % eplaces r.max\_rel\_error

\hline

{\tt r.phase\_tol}      & %{\tt symmetry\_phase\_tolerance} &

                        $10^{-10}$  & echo phase fitting tolerance \\

\hline

{\tt r.phase\_maxdev}   & % {\tt symmetry\_phase\_max\_dev} &

                        $\pi/2$     & echo phase fitting limits (in radians) \\

\hline

{\tt r.phase\_cstep}    & % {\tt symmetry\_phase\_corr\_step}  &

                        $2\pi$      & echo phase smoothing step (in radians) \\

\hline

{\tt r.phase\_minoff}   & % {\tt symmetry\_phase\_min\_offset} &

                        $10^{-5}$   & echo phase minimum offset ({\tt get\_phase\_offset})\\

\hline

{\tt r.max\_chisq}      & % {\tt max\_chisquare}    &

                        300.00      & maximum $\chi^2$ for fitting \\

\hline

{\tt r.center\_size}    & % {\tt central\_detector\_area\_size} &

                        4           & "central" detector area size (pixel x pixels) \\

%\hline

% integer :: symmetry_phase_patch_size     % !> patch size for symmetry phase smoothing algorithm

\hline

{\tt r.postcoll\_qcat}  & % {\tt post\_collection\_qcatch} &

                        0.0         & catch band for post collecting q-values \\

\hline

{\tt r.max\_field\_var} & % {\tt max\_bfield\_variation}   &

                        $10^{-6}$   & maximum magnetic field variation in a scan   \\

\hline

\end{tabular}

\subsection{Instrument Configuration}

\noindent\begin{tabular}{|l|p{4.00in}|}

\hline

{\bf Name}              & {\bf Comment}                         \\

\hline

{\tt i.instrument}      & instrument type (SNS-NSE=1, J-NSE=2) \\

\hline

{\tt i.norm\_counter}   & normalization counter (SNS-NSE=0, J-NSE=5) \\

\hline

{\tt i.det.src}         & source to detector distance (read from the data) [in meters]\\

\hline

{\tt i.det.sam}         & sample to detector distance (read from the data) [in meters]\\

\hline

{\tt i.det.size\_x}     & detector size (horizontal) [in meters] \\

\hline

{\tt i.det.size\_y}     & detector size (vertical) [in meters] \\

\hline

{\tt i.det.center\_x}   & detector center location (horizontal) [in meters] \\

\hline

{\tt i.det.center\_y}   & detector center location (vertical) [in meters] \\

\hline

\end{tabular}

%\begin{verbatim}

% c.last_run        -1.00000000000000

%\end{verbatim}