I heard from a friend that the flight tubes on Agilent QTOF instruments are heated a little bit - default being around 40 deg C. It this true? If so, why are they heated? Is this something that people used to do with older systems, but not newer ones for some reason?
I understand the flight tubes are made of INVAR metal because it's got the lowest coefficient of thermal expansion of any metal - perfect for maintaining a consistent flight path length. Why would they need to be heated?
It sounds like there is a story for why this metal is used and why it may be heated. Does anyone know?
Thanks! - Josh