Hello All,
I am trying to reproduce an XRD method. I know scan range, scan speed and step size. How do I work out the time per step?
Thanks,
Antonio
Dear Antonio,
time/step = step size/scan speed.
You may derive that result from:
total time = scan range/ scan speed
and
total no of steps = scan range/ step size;
thus time per step = total time/ total no of steps =
= (scan range/ scan speed)/(scan range/step size)
= step size/scan speed
Hi Gerhard,
Is "step time" the same as "time per step"? And if not, how do they relate?
Thanks,
Antonio
I was checkign parameters from my Bruker instrument and I think it might coincide with the so called "time per step effective" (still in seconds). Just wondering how this would relate to the "time per step"?
Gerhard Martens, what's the relationship between the "count time" and tthe"t ime per ste"p? My understanding is that the count time coincides with the" time per step effectiv"e which (in my PXRD system) seems to be 165x the time per step Would that be correct?. Not too sure about where this factor comes from...
To my opinion 'count time' and 'time per step' are the same.
The term 'time per step effectiv' is not known to me.
Maybe it is
a) the time per step ( i.e. the counting time per step) plus the time interval which the XRD system needs to go to the next theta/2theta position or
b) the dead time corrected counting time.
But I am not sure.
But the number 165 you mentioned above seem to be dubious.
I never heard 'count time' term in XRD. But there are 'counts' which refer to the intensity/scintillation (also written as cps- counts per seconds). 165 here is maybe detector dependent, maybe changed with different arrangements. But it is impossible to get same counts at every 2theta position.
- Badges
- Science method
- Similar topics
- Methodology
- Crystallography
- X-ray Diffraction