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xf28id-command_summary.txt
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xf28id-command_summary.txt
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Summary of commands for 28-ID
-----------------------------
Before doing anything make sure you have an ipython prompt in the ophyd
environment. If you don't you can type iophyd at a linux prompt.
Before beginning any experiments it's a good idea to define a phython dictionary
with some information about your sample. Something like the following:
In: mysampledict = dict(name='sample name', barcode=123456, experimenter='Dr. Dave')
You can later add new fields to this dictionary as follows:
In: mysampledict['new field'] = 'more info about my sample'
You can also use this syntax to change the text in a field. e.g.
In: mysampledict['barcode'] = 654321
The following commands have been defined for common tasks:
In: thetaLoad()
This will rotate the theta stage so that the sample holder is horizontal and a
smaple can be loaded.
In: thetaMeasure()
This will rotate the theta stage so that the sample holder is vertical and the
sample can be measured.
In: diodeIn()
In: diodeOut()
These will move the diode in and out of the beam.
The following commands will collect a single frame of data
In: ct(sample=mysampledict)
This will collect data on all predefined detectors and save metadata for the
experiment with the python dictionary (mysampledict) that you defined earlier.
In: dscan(diff_x, -10, 10, 20, sample=mysampledict)
This will scan the translation stage along x in 20 steps from -10 to 10 (in mm)
relative to the current position. The same code can be used to scan along the y
direction by replacing diff_x with diffy_y. Again notice that we give it the
python dictionary with our sample and experiment info.
In: diffHome()
This will return the diffraction stage to it's home position, currently defined
as:
X_HOME = 11.0
Y_HOME = 41.0
The general syntax for moving motors is:
In: motor_name.move(number)
Where motor_name is one of:
th (theta stage)
tth (two theta stage)
diff_x (diffraction stage x axis)
diff_y (diffraction stage y_axis)
The following macros have also been defined:
In: loadSample(samplenum, sampledict)
Where samplenum is the number of the sample in the robot carousel and sampledict
is, once again, sampledict is the python dictionary with sample info. This
executes the following sequence:
1. move diode into the beam
2. move the diffraction stage back to its home position
3. save a diode measurment with no sample
When the robot is ready to be used this will also automatically load a sample
and start a scan.