What's a sample for Nth point bkgds

[dawncruth]

What is considered a sample for this? We have to assign a new sample when we open a new run/when the run finishes etc. But we also make new samples in the digitize sample window. If we want to test bkgds every 5 points, is that for the samples in the digitize window?

[John Donovan]

What is considered a sample for this? We have to assign a new sample when we open a new run/when the run finishes etc.

I do not know what you mean by this question.

But we also make new samples in the digitize sample window. If we want to test bkgds every 5 points, is that for the samples in the digitize window?

The Nth point bgd method was developed by Mike Jercinovic, Julien Allaz and myself to deal with beam sensitive samples that require high beam currents and long counting times, but are relatively homogeneous. In this example, the Nth point parameters (in the Acquire! | Acquisition Options dialog were set to "3" for each element:



The idea being that the background is only re-measured every N points.

Nth point samples will work for both manually acquired samples (from the Acquire! window) and also automated acquisitions from the Automate! window. The user's reference manual describes the options in some detail. Also here is a description of Nth point bgds that might be helpful:

https://probesoftware.com/smf/index.php?topic=71.msg7875#msg7875

And here:

https://probesoftware.com/smf/index.php?topic=806.msg8036#msg8036