TOF_x_axis_calibratio transition

hanyifeng

Dear All:

Recently, I'm analyzing TOF data from CSNS. They only provide instrument file of GSAS and Zrietveld. But I prefer Topas, can you tell me how to trans the instrument file from GSAS/Zrietveld to TOF_x_axis_calibration（t0, t1, t2）

Best Regard

Yifeng Han

johnsoevans

t1 should be same as gsas difc.
t0 is gsas zero.
t2 is gsas difa.
Just check everything makes sense with tof=t0+t1*d+t2*d^2;

hanyifeng

Hi John

Thank you very much! It's very useful, but I still can't get a good refine fitting result in Topas(good fit in pawly model,intensities were off in rietveld) as in GSAS. Maybe there's something wrong in my TOF inp file. I think I'm in the same trouble as Zhouhttp://topas.dur.ac.uk/unb/forum.php?req=thread&id=252.

Sincerely,
Yifeng