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NIST Center for Neutron Research

TRIPLE AXIS ICE SEQUENCES

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STANDARD SETUP
SEQUENCE NAME DESCRIPTION
PB_polarizesetup.seq.txt This creates all the devices and opens Python communication with the 3He instrument rack. This must be done at the beginning of the experiment.
PB_Qmode.seq.txt This sets the sample and guide field currents for P \(\parallel\) Q.
PB_Vmode.seq.txt This sets the sample and guide field currents for P \(\perp\) Q.

PB_polarizeddestroy.seq.txt

 This destroys all the devices and closes Python communication with the 3He instrument rack. This must be done at the end of the experiment.

NOTE: If the server re-starts, destroy all devices first and then run the sequence file to create devices.

 

7T SCM SETUP
SEQUENCE NAME DESCRIPTION
PB_polarizesetup7T.seq.txt This creates all the devices and opens Python communication with the 3He instrument rack. This must be done at the beginning of the experiment.
PB_SC7TGuides.seq.txt This sets the guide field currents for P \(\perp\) Q.
PB_polarizeddestroy7T.seq.txt This destroys all the devices and closes Python communication with the 3He instrument rack. This must be done at the end of the experiment.

NOTE: If the server re-starts, destroy all devices first and then run the sequence file to create devices.

 

NSF CELL FLIPPING
SEQUENCE NAME DESCRIPTION
PB_OffOff.seq.txt This corresponds to the 'A' state.
PB_ONOff.seq.txt This corresponds to the 'B' state.
PB_OffON.seq.txt This corresponds to the 'C' state.
PB_ONON.seq.txt This corresponds to the 'D' state.

 

MEASUREMENT MODIFIER
DESCRIPTION MODIFIER(S)

Beam profile: size, slits, etc
  • pb wide
  • pb 1 cm
Experiment type
  • pb 999 (inelastic or powder)
  • pb 60 (elastic)
Flipping ratio
  • pb fr
Empty cell transmission
  • pb mt

Polarizer cell transmission

Polarizer killed cell
  • pb p cell name
  • pb po cell name

Analyzer cell transmission

Analyzer cell killed
  • pb a cell name
  • pb ao cell name

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Created June 10, 2019, Updated February 24, 2023
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