niton to artax software

[Jacob Thomas]

Hello,

I would like to know if anyone is successfully opening data from a Niton with the Artax software by extracting the raw spectra and then adding the appropriate header. I know this is possible with the Innov-X instrument, but I have not had much luck with the Niton.

I have added the header

BeginHeader

Elin=0.015000 Eabs=0

Fano=0.11 FWHM=145

EndHeader

With this header I can open the data and have the lines at roughly the correct energy. You might notice that the resolution is higher with the Niton (Elin=0.015 vs 0.020079). However, element ID does not work. I do not know if this is due to my update to windows 10 and the misery that entails, or if I do not have something quite right in the header (Elin or another parameter). I would appreciate any suggestions on the header. I am going to try this out with an older computer still running windows 7 and test the OS as source of the problem hypothesis.

Thanks

Jacob

[Bruce Kaiser]

Yes this is very easy

You create a txt file with a 4 line header that tells Artax the resolution of the detector, the eV per channel and the beginning eV per channel

If you send me an e mail I will attach a   Typical file when I get internet connection 

This is from my iPhone I am at University of Toronto

Pant...@aol.com

Thanks

Dr Bruce Kaiser

509 528 7608

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[Lee Drake]

Hi Jacob,

I found the problem! The Niton file is highly unusual - it is providing an energy range of 60 keV. And the spectra exceeds the channel count for the available detectors on the market. The odd terminology you find in the file means that this is a mathematical model of a spectra - there has been some photoshop-style post processing of this spectra. So full warning, the data here may not be a perfect representation of the physical spectrum acquired by the instrument. 

That said - the reason the deconvolution is not working is because Artax is confused by the range of energy this was taken at. Artax has energy presets for 10, 20, 40, and 80 keV. This spectrum was purportedly taken with a detector capable of reading 60 keV, though the manufacturer (keytech) is only capable of at best 45 keV with a bit of manipulation (heavier photons will blast right through the 450 micrometer silicon detector). 

All this is to say, you have done everything you need to do on the file. What is now needed is to tell Artax an energy range. Go to Analyze -> Elements and in the lower left corner select '40 keV' as an energy range for the Artax deconvolution to work with. This is a software feature I never thought would be needed, but glad it is there. 

Let me know if you have any questions, 

---

B. Lee Drake

Department of Anthropology
University of New Mexico
(505) 510.1518
b.lee...@gmail.com

    

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[Jacob Thomas]

hello Lee,

It has been a bit of a gap with my working with the niton data, but I came back to it today, and even if I follow you instructions on changing the energy range I have the same problem. When I go back to check it seems that the 40 keV setting is not retained with my copy of the artax software. Any new suggestions. I have attached the files again. The file ending in 'main range' is the text file with the artax header.

On another topic, I would like to make a case for my department to buy an imaging macro xrf. I can arrange for a case study at the local art museum, would it be possible to demo an intrument from Bruker?

thanks

jacob

[Lee Drake]

Hi Jacob,

Not sure - Niton makes things more complicated. I don't know how much more I can help.

Regarding the microXRF - are you thinking small set up (Artax) enclosed box (M4) or painting-sized scanner (M6)?

- Lee

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