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Electron 70eV
Posted: Fri Nov 12, 2010 9:29 pm
by faris
Guys, how can I set the acceleration energy to 70eV in 5972.
Posted: Mon Nov 15, 2010 1:37 pm
by AICMM
faris,
I believe it is fixed in the 72's. I don't think you had the option until the 75's but this is probably easily answered with a visit to Agilent's web site.
Best regards,
AICMM
THANKS
Posted: Mon Nov 15, 2010 2:05 pm
by faris
faris,
I believe it is fixed in the 72's. I don't think you had the option until the 75's but this is probably easily answered with a visit to Agilent's web site.
Best regards,
AICMM
Posted: Wed Nov 17, 2010 3:36 am
by Don_Hilton
I am not sure if you are talking about accelerating the electrons from the electron gun or the formed ions from the ion source.
As I recall, the default ionization energy (the result of acceletating electrons) is 70 eV. I have changed the voltage in a 72 or a 73 (And I am pretty sure it was a 72), but it was about 10 years ago and without access to one of those instruments now, I cann't tell you how I did it.
By the way the objective was to see if I could do soft ionization - which worked, kind of. If you drop the voltage low enough, you do get primarily the molecuar ion formed - apparently. The trouble is the signal has dropped to next to nothing...
If you want to change the accelaration of ions out of the ion source and into the analyzer, you would change the voltage on the repeller.