config_instr

The “config_instr” file defines parameters related to experiment and instrument used during the experiment, such as detector and diffractometer.
The diffractometer and specfile are mandatory parameters for the 34-IDC beamline. The other parameters are obtained from the specfile. They can be overridden when included in this configuration file.

Parameters

  • diffractometer:

Mandatory, name of diffractometer used in experiment.
Must be defined for the beamline.
example:
diffractometer = "34idc"

  • specfile:

Optional (but mandatory for aps_34idc), specfile recorded when the experiment was conducted.
example:
specfile = "/path/to/specfile/Staff20.spec"

Parsed parameters

In a typical scenario at APS 34-idc beamline a spec file is generated during experiment and the parameters listed below are parsed from this file, so the user do not configure them. User may override the parameters.

  • energy

example:
energy = 7.2

  • delta:

delta (degrees)
example:
delta = 30.1

  • gamma:

gamma (degrees)
example:
gamma = 14.0

  • detdist:

camera distance (mm)
example:
detdist = 500.0

  • theta:

angular step size
example:
theta = 0.1999946

  • chi:

example:
chi = 90.0

  • phi:

example:
phi = -5.0

  • scanmot:

example:
scanmot = "th"

  • scanmot_del:

example:
scanmot_del = 0.005

  • detector:

detector name
example:
detector = "34idcTIM2"