6. Command cheatsheet

This section provides a quick summary of the data acquisition commands discussed in the previous sections.

Stopping a measurement

To stop any command do Ctrl-C Ctrl-C

That is, hit Ctrl-C twice!

This will pause the running command and return you to the command line.

Do RE.resume() to continue the command from where it stopped.

Do RE.stop() to fully stop the command.

Note

Parentheses – () – are an essential part of the syntax. Same for RE() and % when specified.

6.1. General commands

Todo

Fix cross-links

shb.open() / shb.close()

Open / close the photon shutter 🡆 Section 2.5.1

RE(mv(delta, <value>))

Move any named motor TO a position (delta is an example) 🡆 Section 2.1

RE(mvr(delta, <value>))

Move any named motor BY an amount (delta is an example) 🡆 Section 2.1

RE(mv(attenuator, N))

Set attenuator, N is an integer between 0 and 15 🡆 Section 2.3

RE(mv(dwell_time, 0.5))

Set measurememt time 🡆 Section 3.1

RE(count([detector], N))

Count on a detector N times. Detector can be struck, mythen, etc

RE(linescan(<motor>, <detector>, <start>, <stop>, <N>))

move a motor, plot a signal 🡆 Section %s

RE(pluck())

Select a point from a plot on screen and move that motor to that position 🡆 Section %s

6.2. Alignment scans

RE(align_slits())

Align slits around beam and make beam position at slit position = 0 🡆 Section 4.3

RE(linescan(dethor, 'mythen', -3, 3, 61)

Align the dethor motor to center detector on beam 🡆 Section 4.4

RE(mythen_calibration(-4, 1, 1001))

Mythen calibration routine 🡆 Section 4.5

6.3. Measurement scans

RE(xrr())

Make an XRR scan