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# Muon Testing
## Ionic Diffusion test
*Preparation*
* Instrument `EMU`
* Files `51341.nxs`, `51342.nxs` and `51343.nxs`
* Make sure the location of these files is included in your search directories. Full instructions [are available online](http://www.mantidproject.org/MBC_Getting_set_up#MantidPlot_First-Time_Setup).
**Time required 5 - 10 minutes**
---
1. Make sure that the `.nxs` files are in one of the directories on Mantid's search path.
* Open Muon Analysis
* Choose `Machine`: `EMU`
* In `Load Run` enter `51341`
* Under `Settings` tab, ensure the `Enable Multiple Fitting` is checked
* In `Data Analysis Tab`
* Beside `Runs` enter `51341-3` and check `Simultaneous` below
* Right click the `Fit Function` table area; select `Add Function`
* Add `Background` > `Flat Background`
* Add `Muon` > `DynamicKuboToyabe`
* Check the `Global` box for: `A0`, `Asym`, `Delta`, `Nu`
* Click on the value `0.0000` for `Field` - a `...` box should appear, click it
* On the `Set` dropdown, select `Fix All`
* Enter values of `0`, `5`, `10` for the three runs
* Set `A0 = 0.05`, `Asym = 0.15`, `Delta = 0.2`, `Nu = 0.1`
* Click `Fit` > `Fit`
* In the `Results Table` tab
* Under `Fitting Results` check the `Simultaneous` button
* Click `Create Table`
* A table should appear in the main Mantid work area
* In the `Results Table` workspace
* Expected values (similar to within 50%) ..
* f0.A0: 0.18235938124844153
* f1.Asym: 0.0050597127151507
* f1:Delta: 0.3301445010124604
* f1:Nu: 0.8574644977974730220884
* In the workspaces section of the main Mantid window:
* Click of the `MuonSimulFit_5141-3` group
* Within this there should be three workspaces
* Right-click each workspace
* Choose `Plot spectrum`
* Choose `1D plot` and click `Plot All`
* The results should look like the image below:
#### Possible problems
* Loading local data for 51341-3; these may not be in recognised directories - make sure that this is the case.
## Superconducting Copper Test
*Preparation*
* Files `EMU00020882.nxs` -- `EMU00020900.nxs`
* Make sure the location of these files is included in your search directories
**Time required 5 - 10 minutes**
---
1. Make sure that the `.nxs` files are in one of the directories on Mantid's search path.
* Open Muon Analysis
* Choose `Machine`: `EMU`
* In `Load Run` enter `20882`
* Click the `>` tab next to `Load Run` a few times, this should produce new plots each time
* Under `Settings` tab, ensure the `Enable Multiple Fitting` is un-checked
* After loading `20884` switch to the `Data Analysis` tab
* Right click under `Property` and select `Add Function`
* Choose `Muon` > `ExpDecayMuon`
* Click `Fit` > `Fit`
* Click `Fit` > `Sequential Fit`
* Beside `Runs` enter `20889-20900`
* Click `start`
* Close the `Sequential Fits` window
* Switch to the `Results Table` tab
* In the `Fitting Results` table check the `Sequential` radio button
* In the `Values` table check `Run Number` and `Field_Danfysik`
* Ensure that all runs are checked in the `Fitting Results` table
* Click `Create Table`
* In the main Mantid GUI select the `ResultsTable` in the `Workspaces` tab, this is the one you just created
* Right click and select `Convert to MatrixWorkspace`
* In the resulting dialog select `Column X` as `Field_Danfysik` and `Column Y` as `lambda`
* Click `Run`
* Right click the new workspace created in the `Workspaces` tab
* Select `Plot Spectrum`
* You should get something like the following plot:
## HIFI Transverse Field Simultaneous Fitting
*Preparation*
* Files `HIFI00134028` -- `HIFI00134039.nxs`
* Make sure the location of these files is included in your search directories
* Make sure that the instrument in the Muon Interface is set to `HIFI`
**Time required 5 - 10 minutes**
---
1. Open the Muon interface, load the first file `HIFI00134028`
* Using the `>` to the right of the `Load Data` box, step through to `134034`
* Go to the `Grouping Options` tab
* Click `Guess Alpha` - in the `Pair Table` box a value of Alpha close to 1.3 should appear
* Return to `Home` tab
* Click `>` until all data sets up to `134039` have been loaded
* In the `Settings` tab ensure that `Enable Multiple Fitting` is checked
* Go to the `Data Analysis` tab
* Right-click in the `Fit Functions` box
* Select `Add function`
* Choose `Background`>`Flat Background`
* Right-click again and `Add function`
* Choose `Muon`>`ExpDecayOsc`
* In the `Fit Function` window select all parameters except `Frequency` to be `Global`
* In the `Runs` box enter `134028-39`
* Check the `Simultaneous` radio button
* Select `Fit`>`Fit`
* After some time the fir should fail to converge, with a large `Chi` value (>100) reported in the `Fit Function` box.
* So we want to re-start to see if the fit works a different way
* In the main Mantid `Workspaces` dialog select all the workspaces and delete them
* Back in the Muon interface load up `HIFI00134034`
* Go to `Grouping Options` and select `Guess Alpha`
* Go to the `Data Analysis` tab
* In the `Runs` box enter `134028-39`
* Check the `Simultaneous` radio button
* Add the same functions as above (`Flat Background` and `ExpDecayOsc`)
* In the `Fit Function` window select all parameters except `Frequency` to be `Global`
* Click on the value of the `Frequency` parameter; a `...` box should appear, click it
* Enter values for each of the rows in the table that opens, values from `0.0 - 1.1` in steps of `0.1`
* Click `OK`
* Select `Fit`>`Fit`
* You should now get a significantly lower `Chi-sq` value (<10)
* In the main Mantid window
* Click on the `MuonSimulFit_134028-39`
* Scroll to the workspaces
* Right-click on one, choose `Plot spectrum`
* Choose `1D Plot` and select `Plot All`
* You should get some plots like this:
## Transverse Field Asymmetry Test
*Preparation*
* Files `MUSR00062260.nxs `
* Make sure the location of these files is included in your search directories
* Make sure that the instrument in the Muon Interface is set to `MUSR`
**Time required 5 - 10 minutes**
---
1. Open the Muon Data Analysis interface
* Go to the home tab and select instrument MUSR
* Ensure that you have access to the archive
* Load run `62260`
* * Add a “Flat Background” and “GausOsc” functions
* In the Data Analysis tab “TF Asymmetry Mode” should be ticked
* Set the “Groups/Pairs to fit” to “Custom”
* A pop-up should appear and make sure that only “fwd” is ticked
* Close the pop-up
* Run a fit