[GSAS-II] 2D image Calibration of CeO2 (Ceria) Using a GE2 detector - Possible Detector Specific Issue

[Serio, Joseph A.]

Hi Peter,

Any way that I can explicitly deal with that? Trying to make sure the rest of my data doesn’t suffer from this same issue.

Joe S.

From: Peter Y. Zavalij [mailto:pzavalij at umd.edu]
Sent: Tuesday, July 11, 2017 9:23 AM
To: Serio, Joseph A. <serioja at ornl.gov>
Subject: Re: [GSAS-II] 2D image Calibration of CeO2 (Ceria) Using a GE2 detector - Possible Detector Specific Issue

2nd plot looks like specimen shift.
Peter Z.

On Jul 11, 2017 9:19 AM, "Serio, Joseph A." <serioja at ornl.gov<mailto:serioja at ornl.gov>> wrote:
A follow up to my previous question, for people who read this is in the future. I have (hopefully) attached what my position calibration appears as after performing the 2D image tilt calibration. It seems that I am able to fit a function similar to the previous mentioned one in order to model this shift, on the order of rtrue = rmeasured * (1 + 0.004 (rmeas/detectorhalfsize)^2). This disagrees with the negative “a” value obtained in the paper, instead yielded a necessary increase in the diffraction ring diameter. Any help on this issue is still appreciated.


J.S.


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