[Ifeffit] Origin of noise in Ag K-Edge

[Robert Gordon]

Then Matt's suggestion of having changed the uniformity ... Are you 
using a focused beam/small beam size?
A small amount of motion of beam or sample relative to the other could 
move you on or off a cluster.

Transmission signal should show more noise then, but not I0.

You could try a larger beam, or rotating the sample a bit to have a 
larger footprint...greater effective thickness
and better averaging over non-uniformity.

-R.

On 2024-04-30 8:35 a.m., Sebastian Kunze wrote:
> Dear Shelly, Robert, Matt, thank you for your kind replies, I think I 
> should give more information about the measurement.  The sample is a 
> sealed battery anode consisting of silver particles that should 
> undergo alloying with Lithium during
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> Dear Shelly, Robert, Matt,
>
> thank you for your kind replies, I think I should give more 
> information about the measurement.
> The sample is a sealed battery anode consisting of silver particles 
> that should undergo alloying with Lithium during charging. This is 
> done at constant temperature and applied pressure. I repeated this 
> experiment under different conditions several times, and each time 
> there is less noise before a certain time during the charging process, 
> after which is persists even when the battery is at rest (not 
> charging/discharging). I0 also did not fluctuate much, and the 
> integration time for each point is indeed the same. Therefore I think 
> it is not instrumental, but rather something happening in the sample. 
> As you can see from the spectra, the silver particles experience a 
> strong decrease of uniform structure when they lithiate. For me, this 
> at least explains why the noise in the post-edge increases, but can it 
> also explain the noise in the edge and pre-edge?
>
> In any case, thank you very much for your answers!
>
> Best,
> Sebastian
>
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