From 466d572cf7399f7102b0766b430383e28101bfc3 Mon Sep 17 00:00:00 2001 From: Blaise Thompson Date: Mon, 9 Apr 2018 16:37:48 -0500 Subject: 2018-04-09 16:37 --- introduction/chapter.tex | 23 +++++++++++------------ 1 file changed, 11 insertions(+), 12 deletions(-) (limited to 'introduction/chapter.tex') diff --git a/introduction/chapter.tex b/introduction/chapter.tex index 285bd14..4d1a566 100644 --- a/introduction/chapter.tex +++ b/introduction/chapter.tex @@ -101,13 +101,12 @@ WrightTools is made to be extended, so it will continue to evolve along with its From an instrumental perspective, MR-CMDS is a problem of calibration and coordination. % Within the Wright Group, each of our two main instruments are composed of roughly ten actively moving component hardwares. % -Many of these components are purchased directly from vendors such as SpectraPhysics, National -Instruments, Horiba, Thorlabs, and Newport. % -Others are created or heavily modified by graduate students. % +Many of these components are purchased directly from commercial vendors, while others are created +or heavily modified by graduate students. % The Wright Group has always maintained custom acquisition software packages which control the complex, many-stepped dance that these components must perform to acquire MR-CMDS spectra. % -When I joined the Wright Group, I saw that acquisition software was a real barrier to experimental +When I joined the Wright Group, I saw that acquisition software was a barrier to experimental progress and flexibility. % Graduate students had ideas for instrumental enhancements that were infeasible because of the challenge of incorporating the new components into the existing software ecosystem. % @@ -126,7 +125,7 @@ This has enabled graduate students to add and remove hardware whenever necessary about a heavy additional programming burden. % PyCMDS is now used to drive both MR-CMDS instruments in the Group, allowing for easy sharing of component hardware and lessening the total amount of software that the Group needs to maintain. % -Besides being more flexible, PyCMDS solves a number of other problems. % +Besides being more flexible than prior software, PyCMDS solves a number of other problems. % It offers fully automated strategies for calibrating component hardwares, making calibration less arduous and more reproducible. % It offers more fine-grained control of data acquisition and timing, enabling more complex @@ -138,9 +137,8 @@ Like any analytical technique, MR-CMDS is subject to artifacts: features of the caused by instrumental imperfections or limitations, and do not reflect the intrinsic material response that is of interest. % % JCW: HOW THE EXPERIMENT WAS DONE, NOT WHAT IT IS HOPING TO MEASURE -For example, consider absorptive effects \cite{CarlsonRogerJohn1989a}, pulse effects -\cite{SpencerAustinP2015a}, and window contributions \cite{MurdochKiethM2000a}: all well-known -artifacts in CMDS. % +For example, consider well-known artifacts such as absorptive effects \cite{CarlsonRogerJohn1989a}, +pulse effects \cite{SpencerAustinP2015a}, and window contributions \cite{MurdochKiethM2000a}. % Since MR-CMDS is a very active experiment, with many moving motors, an active approach to artifact correction is particularly appropriate. % Chapter \ref{cha:act} describes strategies for implementing such corrections. % @@ -149,7 +147,7 @@ at the same time. % Dual chopping can correct for scatter and other unwanted processes, ensuring that the observed signal depends on all of the excitation beams. % Fibrillation can wash out interference between desired and undesired processes, and is -complementary with chopping. % +complementary to chopping. % Automated poynting correction and power correction can account for non-idealities in OPA performance. % @@ -160,12 +158,13 @@ Resonant responses are impulsive, like a hammer hitting a bell. % The impulsive limit is particularly well suited for describing time domain experiments. % In the driven limit, pulses are narrow in frequency and long in time compared to material response. % -Resonant responses are driven, like a jello dessert sitting on a washing machine. % +Resonant responses are driven, like a jiggling jello dessert sitting on a washing machine. % The expected spectrum in both of these limits can be computed analytically. % Things get more complicated in the mixed domain, where pulses have similar bandwidth as the material response. % Experiments in this domain are a practical necessity as CMDS addresses systems with very fast -dephasing times. \cite{SmallwoodChristopherL2016a, PerlikVaclav2017a} % +dephasing times. \cite{SmallwoodChristopherL2016a, PerlikVaclav2017a} % BJT: connect bw and + % dephasing At the same time, the marginal resolution in frequency \emph{and} time that the mixed domain possess promises huge potential in pathway resolution and decongestion. \cite{PakoulevAndreiV2009a} % @@ -208,7 +207,7 @@ Despite challenges in software, hardware, and theory MR-CMDS is a crucial tool i scientists. % This dissertation describes several ways to make MR-CMDS more accessible through software and hardware development. % -PyCMDS has made data collection faster and more artifact-free. % +PyCMDS has enabled new experiments, and has made data collection faster and more artifact-free. % WrightTools has trivialized data processing, tightening the loop between idea and execution. % Theory can be used to guide experimental insight in the promising, if challenging, mixed domain. % Applications of these ideas in three materials are presented. % -- cgit v1.2.3