Changes between Version 25 and Version 26 of TartuSchoolSasView
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- Sep 14, 2017 5:00:12 PM (7 years ago)
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TartuSchoolSasView
v25 v26 1 1 = Exercise 9 - SANS Data Analysis using !SasView = 2 2 3 [[PageOutline]] 4 5 6 == Introduction == 3 ||= **Table of Contents** =|| 4 || [#intro Introduction]|| 5 || [#section1 1. Familiarisation with SasView] || 6 || [#section2 2. Exploring geometrical models] || 7 || [#section3 3. Fitting SANS data] || 8 || [#resources Resources] || 9 10 11 == [=#intro Introduction] == 7 12 This exercise will introduce you to analysing SANS data using geometrical models in !SasView. You will first look at how different shapes produce different scattering patterns, and how the model parameters affect the scattering pattern. You will then load some real SANS data and attempt to fit models to the data in !SasView. 8 13 … … 18 23 {{{ 19 24 #!div style="background: lightblue" 20 **TASK :** Do this thing25 **TASK X:** Do this thing 21 26 }}} 22 27 … … 26 31 {{{ 27 32 #!div style="background: lightblue" 28 **TASK:**Start !SasView. The application should open and look something like the images below.33 [=#task1 **TASK 1:**] Start !SasView. The application should open and look something like the images below. 29 34 }}} 30 35 … … 50 55 {{{ 51 56 #!div style="background: lightblue" 52 **TASK:**Briefly familiarise yourself with !SasView panels, menus and documentation. Try changing to different analysis tools.53 }}} 54 55 56 57 == [=#section2 2. ] Exploring geometrical models==57 [=#task2 **TASK 2:**] Briefly familiarise yourself with !SasView panels, menus and documentation. Try changing to different analysis tools. 58 }}} 59 60 61 62 == [=#section2 2. Exploring geometrical models] == 58 63 In this part of the exercised, you will plot the scattering patterns calculated using different geometrical models and explore the effect that the model parameters have on the scattering. 59 64 60 65 {{{ 61 66 #!div style="background: lightblue" 62 **TASK:**Restart !SasView67 [=#task3 **TASK 2:**] Restart !SasView 63 68 64 69 Before starting this part of the exercise, you should have a clean !SasView instance. Quit !SasView and restart it. … … 66 71 67 72 68 === Spheres===69 70 {{{ 71 #!div style="background: lightblue" 72 **TASK:**Plot the scattering from a collection of spherical particles73 === [=#section21 2.1 Spheres] === 74 75 {{{ 76 #!div style="background: lightblue" 77 [=#task4 **TASK 4:**] Plot the scattering from a collection of spherical particles 73 78 74 79 In the Fit Panel, there should be a single tab labelled "Fitpage1". In that tab, choose the model category "Sphere" and the model "sphere". … … 81 86 {{{ 82 87 #!div style="background: lightblue" 83 **TASK:**Change the parameters and note the changes in the scattering pattern.88 [=#task5 **TASK 5:**] Change the parameters and note the changes in the scattering pattern. 84 89 85 90 In the "Fitpage1" tab, scroll down to the bottom and: … … 101 106 102 107 103 === Cylinders===104 105 {{{ 106 #!div style="background: lightblue" 107 **TASK:**Plot the scattering from a collection of cylindrical particles108 === [=#section22 2.2 Cylinders] === 109 110 {{{ 111 #!div style="background: lightblue" 112 [=#task6 **TASK 6:**] Plot the scattering from a collection of cylindrical particles 108 113 109 114 From the "Fitting" menu, select "New Fit Page". … … 118 123 {{{ 119 124 #!div style="background: lightblue" 120 **TASK:**Change the parameters and note the changes in the scattering pattern.125 [=#task7 **TASK 7:**] Change the parameters and note the changes in the scattering pattern. 121 126 122 127 In the "Fitpage2" tab, scroll down to the bottom and: … … 139 144 140 145 141 === Polydispersity===142 143 {{{ 144 #!div style="background: lightblue" 145 **TASK:**Apply polydispersity to model parameters146 === [=#section23 2.3 Polydispersity] === 147 148 {{{ 149 #!div style="background: lightblue" 150 [=#task8 **TASK 8:**] Apply polydispersity to model parameters 146 151 147 152 Select the "Fitpage1" tab that contains the sphere model. … … 160 165 161 166 162 == [=#section3 3. ] Fitting SANS data==167 == [=#section3 3. Fitting SANS data] == 163 168 164 169 This part of the exercise will use real SANS data taken from a study of surfactant self assembly in deep eutectic solvents (DES). … … 166 171 {{{ 167 172 #!div style="background: lightblue" 168 **TASK:**Restart !SasView173 [=#task9 **TASK 9:**] Restart !SasView 169 174 170 175 Before starting this part of the exercise, you should have a clean !SasView instance. Quit !SasView and restart it. 171 176 }}} 172 177 173 === Background information===178 === [=#section31 3.1 Background information] === 174 179 Deep eutectic solvents are a class of ionic liquids formed from a hydrogen bond donor and a halide salt. At a certain mixture ratio, the eutectic mixture, the melting point is significantly depressed to values below room temperature. 175 180 … … 181 186 {{{ 182 187 #!div style="background: lightblue" 183 **TASK:**Download the SANS data : [attachment:TartuSasViewTutorialData.zip] and unzip the file in a known location on your filesystem. Note where you have placed the data.188 [=#task10 **TASK 10:**] Download the SANS data : [attachment:TartuSasViewTutorialData.zip] and unzip the file in a known location on your filesystem. Note where you have placed the data. 184 189 }}} 185 190 … … 191 196 192 197 193 === Calculating Scattering Length Density===198 === [=#section32 3.2 Calculating Scattering Length Density] === 194 199 195 200 The scattering length density is given by … … 215 220 {{{ 216 221 #!div style="background: lightblue" 217 **TASK:**Calculate the scattering length density (SLD) of a 1:2 mole ratio mixture of choline chloride and urea.222 [=#task11 **TASK 11:**] Calculate the scattering length density (SLD) of a 1:2 mole ratio mixture of choline chloride and urea. 218 223 219 224 Use the information in the table above to calculate the SLD. There are multiple ways to do so, including: … … 227 232 228 233 229 === Loading and Plotting the data===234 === [=#section33 3.3 Loading and Plotting the data] === 230 235 231 236 You will now load the data into !SasView and make a plot in order to visually inspect the scattering curves. … … 233 238 {{{ 234 239 #!div style="background: lightblue" 235 **TASK:** Click on the "Load Data" button in the Data Explorer240 [=#task12 **TASK 12:** Click on the "Load Data" button in the Data Explorer 236 241 237 242 Locate the folder where you placed the data, select all the files in that folder and click "Open" in the dialog. … … 245 250 {{{ 246 251 #!div style="background: lightblue" 247 **TASK:** Plot the loaded data252 [=#task13 **TASK 13:** Plot the loaded data 248 253 249 254 Make sure that all the datasets have check marks next to them in the Available Data section of the Data Explorer, as shown above. … … 258 263 {{{ 259 264 #!div style="background: lightblue" 260 **TASK:**Examining the Data.265 [=#task14 **TASK 14:**] Examining the Data. 261 266 262 267 Visually inspect the data, zooming in and making additional plots as needed. … … 268 273 269 274 270 === Fitting the data===271 {{{ 272 #!div style="background: lightblue" 273 **TASK:** Fitting the lowest concentration data.275 === [=#section34 3.4 Fitting the data] === 276 {{{ 277 #!div style="background: lightblue" 278 [=#task15 **TASK 15:** Fitting the lowest concentration data. 274 279 275 280 Select the lowest concentration data only in the data explorer by ensuring only 0p2hSDS_dChCldUrea_sub.txt has a check mark next to it and click “Send to" fitting. … … 287 292 {{{ 288 293 #!div style="background: lightblue" 289 **TASK:**Fitting the other data, starting with the 7.5 wt% data set.294 [=#task16 **TASK 15:**] Fitting the other data, starting with the 7.5 wt% data set. 290 295 291 296 Repeat for other concentrations … … 298 303 299 304 300 == Resources==305 == [=#resources Resources] == 301 306 302 307 * The original [paper attachment:MicelleStructureinDeepEutecticSolvents.pdf] and [supplementary information attachment:MicelleStructureinDeepEutecticSolvents Supplementary Information.pdf]
