Look at the manual.
There is an alignment procedure there.
Going off of my memory would not be the best way to go.
But start with the largest OL aperture.
Do tilts at low beam currents, shifts at higher beam currents.
I would usually align looking for highest beam current attainable for any probe current setting.
Sometimes it helps to observe the beam on a fluorescent sample like benitoite.
You also need to wobble the OL aperture and work toward smaller holes.
These are just general comments. The procedure in the manual should get you close at least.
Sent by Mr. "T"
> On Jan 3, 2019, at 9:41 AM, Ioannis Baziotis <[log in to unmask]> wrote:
>
> I have a question for those who have experience from JEOL JXA 8900 Superprobe. In case of bad alignment, is there any DETAILED PROTOCOL you use to initially align the beam or to reset the total column? That would be great help to start with, before call JEOL service.
> ----------------------------------------------------------------
> Ioannis Baziotis [log in to unmask]
> Assistant Professor of Mineralogy and Petrology
> Agricultural University of Athens
> Laboratory of Mineralogy and Geology
> Athens, 11855 Greece
> (+30)210-529-4155
> Twitter: https://twitter.com/EGU_GMPV
> Personal site: http://ibaziotis.wix.com/ioannis-baziotis
> ----------------------------------------------------------------
> Next dream is "on-the-go" .........mid -April 2019
>
>
>
> Στις Παρ, 28 Δεκ 2018 στις 3:25 μ.μ., ο/η Ioannis Baziotis <[log in to unmask]> έγραψε:
>> Dear Colleagues,
>>
>> I have noticed the following problem on my JEOL JXA-8900 Superprobe.
>> At the lowest magnification (40X), the 30% of the screen (left part) is black (either under SE or BSE). Please note, that under OM (reflected light) the image looks perfect. Also, at higher mag the horizontal movement (when inspecting a sample) is like having internal reflections. The filament has been replaced very recently, however, i had the same problem still occurring since the last week with the previous filament. Also, at higher mag (from 950X to 1000X and 9500X to 10000X) there is a considerable shift on horizontal axis. I tried the objective lense aperture (X and Y) however, nothing changed. Any idea for the problem and how can i fix it?
>>
>> All the best.
>>
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