From 9d8496be4cf2719c3dd7ca2a4b4de91ad4abeeb3 Mon Sep 17 00:00:00 2001
From: Blaise Thompson <blaise@untzag.com>
Date: Fri, 30 Mar 2018 13:54:43 -0500
Subject: 2018-03-30 13:54

---
 active_correction/chapter.tex | 39 ++++++++++++++++++++++++---------------
 1 file changed, 24 insertions(+), 15 deletions(-)

(limited to 'active_correction')

diff --git a/active_correction/chapter.tex b/active_correction/chapter.tex
index ee20859..ef19f40 100644
--- a/active_correction/chapter.tex
+++ b/active_correction/chapter.tex
@@ -18,23 +18,36 @@
 
 \clearpage
 
-\section{Hardware}  % -----------------------------------------------------------------------------
+\section{Introduction}  % =========================================================================
 
-\subsection{Delay Stages}
+MR-CMDS is subject to a number of possible artifacts, many of them stemming from the imperfect
+nature of the frequency-tunable light sources we currently have.  %
+It is self-evidently desirable to correct these artifacts, when possible.  %
+Indeed many of these artifacts, such as OPA power, phase mismatch and absorption effects have
+regularly been corrected for.  % TODO: link to examples in applications section
+These corrections are applied after measurement, typically including information from other sources
+(such as absorption spectra, in the case of absorption effect corrections).
 
-% TODO: discuss _all 3_ delay configurations.... implications for sign conventions etc
+A more interesting class of corrections are ``active'' corrections---that is, corrections that must
+be actively applied during acquisition and cannot be applied in post processing.  %
+These corrections are more insidious, and they are often neglected because the hardware and/or
+software does not allow for them.  %
 
-\section{Signal Acquisition}
+In this chapter I explore some of these active correction strategies that are useful in the context
+of MR-CMDS.  %
+Some of these strategies have already been implemented, others are partially implemented, and
+others are still just ideas.  %
+I hope to show that active correction is a particularly useful strategy in MR-CMDS.  %
 
-Old boxcar: 300 ns window, ~10 micosecond delay. Onset of saturation ~2 V.
+\section{Spectral delay correction}  % ============================================================
 
-\subsection{Digital Signal Processing}
+\section{Poynting correction}  % ==================================================================
 
-% TODO:
+\section{Excitation power correction}  % ==========================================================
 
-\section{Artifacts and Noise}  % ------------------------------------------------------------------
+\section{Chopping}  % =============================================================================
 
-\subsection{Scatter}
+\subsection{Scatter}  % ---------------------------------------------------------------------------
 
 Scatter is a complex microscopic process whereby light traveling through a material elastically
 changes its propagation direction.  %
@@ -270,10 +283,6 @@ Now, substituting in BRAZARD formalism:
     \frac{<D_{PR}>D}{D_{PR}}}{<PR><PU>}
 \end{equation}
 
-\section{Light Generation}  % ---------------------------------------------------------------------
+\section{Fibrillation}  % =========================================================================
 
-\subsection{Automated OPA Tuning}
-
-\section{Optomechanics}  % ------------------------------------------------------------------------
-
-\subsection{Automated Neutral Density Wheels}
+\section{Conclusions}  % ==========================================================================
\ No newline at end of file
-- 
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