"N Beta" in TOPAS Full Axial Model
Can anyone tell me the meaning and possible setting for the "N Beta" item in the Full Axial Model on the Instrument Parmeters page of TOPAS. We have always used a setting of 20 but I have no idea why or what it means. ++ Please do NOT attach files to the whole list Send commands to eg: HELP as the subject with no body text The Rietveld_L list archive is on http://www.mail-archive.com/rietveld_l@ill.fr/ ++
Re: "N Beta" in TOPAS Full Axial Model
From the Tech Ref: [axial_n_beta #20]: Define the number of rays emanating from a point X-ray source in the axial plane. Larger values for axial_n_beta increases both accuracy and calculation time. Looks like Alan is doing some sort of ray tracing to calculate the peak profiles. On 20 December 2013 09:18, Allen, Douglas R. wrote: > Can anyone tell me the meaning and possible setting for the “N Beta” > item in the Full Axial Model on the Instrument Parmeters page of TOPAS. We > have always used a setting of 20 but I have no idea why or what it means. > > ++ > Please do NOT attach files to the whole list > > Send commands to eg: HELP as the subject with no body > text > The Rietveld_L list archive is on > http://www.mail-archive.com/rietveld_l@ill.fr/ > ++ > > > ++ Please do NOT attach files to the whole list Send commands to eg: HELP as the subject with no body text The Rietveld_L list archive is on http://www.mail-archive.com/rietveld_l@ill.fr/ ++
RE: "N Beta" in TOPAS Full Axial Model
Thanks. It seems I should learn how to use the search function in my PDF reader. Searching on "beta" turns up the same reference you gave that I could not find by manually scanning the manual for an hour. From: Matthew Rowles [mailto:rowle...@gmail.com] Sent: Thursday, December 19, 2013 3:31 PM To: Allen, Douglas R. Cc: rietveld_l@ill.fr Subject: Re: "N Beta" in TOPAS Full Axial Model From the Tech Ref: [axial_n_beta #20]: Define the number of rays emanating from a point X-ray source in the axial plane. Larger values for axial_n_beta increases both accuracy and calculation time. Looks like Alan is doing some sort of ray tracing to calculate the peak profiles. On 20 December 2013 09:18, Allen, Douglas R. mailto:douglas_al...@fmi.com>> wrote: Can anyone tell me the meaning and possible setting for the "N Beta" item in the Full Axial Model on the Instrument Parmeters page of TOPAS. We have always used a setting of 20 but I have no idea why or what it means. ++ Please do NOT attach files to the whole list mailto:alan.he...@neutronoptics.com>> Send commands to mailto:lists...@ill.fr>> eg: HELP as the subject with no body text The Rietveld_L list archive is on http://www.mail-archive.com/rietveld_l@ill.fr/ ++ ++ Please do NOT attach files to the whole list Send commands to eg: HELP as the subject with no body text The Rietveld_L list archive is on http://www.mail-archive.com/rietveld_l@ill.fr/ ++
