Probe Software Users Forum

Hardware => JEOL => Topic started by: Ben Buse on January 27, 2015, 09:07:48 AM

Title: Jeol setting PHA for every element
Post by: Ben Buse on January 27, 2015, 09:07:48 AM
Hi,

I couldn't find a post about this so here goes. I've always found it a pain setting the PHA for each element - this is despite when using integratal mode it remains constant for months until you change the bottle.

So I finally decided to do Paul Carpenter's suggestion of emprical curves (e.g. http://epmalab.uoregon.edu/Workshop2/Carpenter_Oregon_Workshop_2007.pdf) to determine the bias for any elements. As such I just plotted up PHA data collected in the last month or so

Figure attached
(https://smf.probesoftware.com/gallery/453_28_02_22_2_20_21.jpeg)

Giving me the empirical equations to calculate bias for any element and enter into PFE. The trick is energy is plotted as natural log to give striaght line.

Title: Re: Jeol setting PHA for every element
Post by: Ben Buse on March 17, 2015, 06:05:59 AM
An update,

As covered in probewin manual you can then set up an empircal correction. Entering the intercept and slope for each spectrometer/bias/crystal into emppha.dat

(https://smf.probesoftware.com/gallery/453_28_02_22_2_23_17.png)

Then when adding elments you can click calculate empirical pha - it will calculate it where intercepts and slopes have been added for that spectrometer, crystal & bias - check using desired bias before clicking

(https://smf.probesoftware.com/gallery/453_28_02_22_2_24_12.png)

In probewin.ini can set UseEmpiricalPHADefaults=1