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voltage

Hitachi S-4700 FE-SEM

FESEM update

September 19, 2018. The engineers think there is some contamination on a stationary aperture in the column. It will be a big job to change it and it couldn’t be done before next week at the earliest, more likely the week after. I found that the scope works fine at …

TEM is down

March 24, 2017. The accelerating voltage system is not working correctly and the TEM cannot be used. I have a call in to the technician. Look for updates as this repair progresses. UPDATE March 27, 2017. The TEM is down bad. There is a failed or partially failed electrical component …

FE SEM

FE-SEM Down

December 8, 2016. There is a problem turning on the voltage after signing in. Owen has shut down the scope for the rest of the day until he has time to fix it. We’ll let you know when it’s back up. -Danielle

TEM update

November 17, 2013. The service engineer will return this week to complete installation of the new(er) JEOL 2010 TEM. Key parts of this effort include stabilizing the accelerating voltage and burning in the new cathode. Ideally we want to move the high speed digital camera from the 4000 TEM to …

FESEM settings

April 9, 2013. I’ve been asked a few times recently why the settings, including kV, condenser lens, detector choice, extraction & emission current, etc., change from one session to another. The FESEM is a flexible instrument that is suitable for examination of varied samples. As such, it is unlikely that …

TEM

TEM status

October 2, 2012. The TEM problem seems to be in remission so, I am releasing the TEM for routine use. Note that the dark current values have changed since we opened the HV tank. This will affect the maximum beam current values. IMPORTANT NOTE – The maximum kV is 200! …

TEM

TEM update

August 21, 2012. The TEM electron beam problem appears to be repaired. I have been able to achieve a stable 200kV beam ~10 times now so I believe the problem is repaired. I will work to achieve 300kV over the next few weeks. There is one problem that remains to …

TEM

TEM status

July 2, 2012. The TEM is still not working. I do not know when it will be working, either. The service engineer visited last week and, after some repair, the TEM worked fine until Friday when the problem resurfaced. I am still in contact with the service engineer by phone and …