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September 2020

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Subject:
Re: TAPJ, TAPH, TAPL or TAP?
From:
Cyril <[log in to unmask]>
Reply To:
JEOL-Focused Probe Users List <[log in to unmask]>
Date:
Thu, 24 Sep 2020 08:10:30 -0700
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text/plain
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Johansson crystals give better resolution over the entire spectrum but are more expensive due to the difficulty in manufacturing.
If I recall correctly, on one of my trips to the JEOL factory, they were hand lapped to get the correct curvature. So there was some loss due to breakage/damage.


Cyril Kirkland 

> On Sep 24, 2020, at 2:45 AM, Radek Michallik <[log in to unmask]> wrote:
> 
> Hi and thank you all for the quick reply.
> 
> Indeed, Johan vs Johansson crystals makes sense. Is not the resolution better with Johansson crystals? What is the benefit of the Johan geometry compared to the Johansson, then? Are they cheaper? More durable? 
> 
> Rgds,
> Radek
> 
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