Difference between revisions of "Calibration"

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Calibration files are obtained from a 12-histogram GSAS refinement of data collected on a powder sample containing a mixture of NIST SRM Al2O3 & Si.
Calibration files are obtained from a 12-histogram GSAS refinement of data collected on a powder sample containing a mixture of NIST SRM Al2O3 & Si.


The standard calibration scan parameters are:
The standard calibration scan parameters at 30 keV currently are as follows:
*2theta start: -17 deg
*2theta start: -17 deg


Line 12: Line 12:
*step size: 0.0005 deg
*step size: 0.0005 deg


*count time: 0.01 sec/step''
*count time: 0.01 sec/step


 
= Calibration =
 
The robot system (''aka'' [[Snookums]]) can access 56 samples mounted on individual posts plus 6 magazines of 16 samples each. A diagram for viewing showing the numbering is found
[http://wiki.aps.anl.gov/s11bm/index.php/Image:11-BM_Robot_Magazine_Diagram_2008-09-11.jpg here].
 
=== Robot Operator Functions ===

Revision as of 16:56, 23 June 2010

A calibration file is needed to merge data collected from each of 11-BM 12 detectors into a single 2theta vs intensity dataset.

The calibration file corrects each of the 12 detectors for 2theta zero shift, wavelength, and scaling factor.

Calibration files are obtained from a 12-histogram GSAS refinement of data collected on a powder sample containing a mixture of NIST SRM Al2O3 & Si.

The standard calibration scan parameters at 30 keV currently are as follows:

  • 2theta start: -17 deg
  • 2theta end: 50 deg
  • step size: 0.0005 deg
  • count time: 0.01 sec/step

Calibration