ELECTRON MICROSCOPY ( TEM ) - Coursework Example

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c) Yes Based on the answers in Q1. A) and Q1. B) vacuum level of 10-6 torr is adequate to operate a TEM. However, slightly better vacuum will be good for better quality imaging and analytical application.
Q1. d) Better than 10-6 torr vacuum level will help in focussing the…

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Subject: Miscellaneous
Type: Coursework
Level: Undergraduate
Pages: 3 (750 words)
Downloads: 2
Author: schroederalfonz

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When high voltage is applied between titanium cathode and an anode, then cold discharge is produced. The electrons are magnetically confined between the electrodes, leading to acceleration of electrons which further ionized the gases between the electrodes. The ionized gases are getted or absorbed in the titanium cathode, which is the active material or getter. Besides, titanium also gets sputtered by the ionized gases and the sputtered titanium also absorbs the gases in the region between the electrodes.

Thus getting action of titanium leads to evacuation. This is the rate of evacuation of air molecule. As we know ~80% of these molecules are nitrogen molecules and also that one mole contains 6.023*1023 molecules; the number of molecules of nitrogen getting evacuated will

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