We run a GeoLas / Coherent system in our lab. We did replace the mirrors/windows in the laser unit a couple of years ago because or laser output was steadily diminishing. It was fairly straightforward but needed a great deal of care. The laser output was improved after the change. Coherent were very helpful but we did the work ourselves. If you are reasonably competent at fine manipulation and are careful with the expensive laser components you are handling I see no reason why you cannot extend the life of your 193 system. I'm not familiar with the esi system but you will need to be very careful with the gas fill in the cavity and have a clear procedure for ensuring that the ArF has been thoroughly flushed from your system.
Dr Bill Perkins
Reader in Geochemistry
Department of Geography and Earth Sciences
Email: [log in to unmask]
From: PLASMACHEM-L: Analytical Chem.(ICP's, DCP's, MIP's). [mailto:[log in to unmask]] On Behalf Of Brätz, Helene
Sent: 30 March 2017 08:50
To: [log in to unmask]
Subject: laser ablation unit
currently we are busy searching for a new laser ablation unit which will be connected to an Agilent 7500c ICPMS. Right now we are using an esi 193FX unit in order to ablate geological samples, mainly silicates, sulfides and oxides in thin sections. The craters produced by the esi 193FX are extremely smooth apart from those of quartz and fluorite. Unfortunately our system is slowly but surely approaching the end of its lifetime unless the laser cavity gets refurbished.
Has anyone experience in that kind of 'refurbishing' of a laser-system, how reliable is it and how long will the new laser unit last ?
Alternatively we are interested in buying a new 213 nm laser: whats your experience with the 213nm laser unit ? Does it produce reasonable craters ? There are several providers on the market, whats your experience ?
Thank you very much for your efforts !
dr Helene Brätz
fon. 09131 85 22700
fax. 09131 85 23734
mail. [log in to unmask]
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