adding polarised diffraction mode

[dehoni]

Instrument(s)

LARMOR

Story/Acceptance criteria

The PR contains the changes necessary to run polarised diffraction on LARMOR.

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Code Review

• Is the story/acceptance criteria fulfilled?
• Is the code of an acceptable quality?
• Are the tests sufficient?
• Do the changes function as described and is it robust?
• Are the changes able to work across all intended instruments?

Final Steps

• Are there any changes to instrument configurations required?
• Are there any changes to instrument scripts required, e.g. change on script signature, default argument and have these been communicated?
• Does the script need to be deployed onto the instrument?