Category: Hitachi S-4700 FE-SEM

FE-SEM in Electron Optics

All reservations cancelled

As a result of Dr. Koubek’s email to campus regarding the Governor’s executive order, I am cancelling all use reservations in the calendar this afternoon.  We will be ready to begin again after we return from the stay at home 3 weeks from now.

Change to FESEM x-ray detector

A persistent complaint about the FESEM EDS system was that it was hard to get enough counts (deadtime) for optimal work. To address this we upgraded the detecting crystal in the EDS detector. Now the crystal is 30 mm2 – it was 10 mm2. Now, for the same beam current, there are additional counts (deadtime). You can get 25-30% deadtime at 20kV with the condenser lens set to 5.

I have the system calibrated and you are free to use the upgraded EDS system.

Let me know if you have questions.