Your Search Results

Use this resource - and many more! - in your textbook!

AcademicPub holds over eight million pieces of educational content for you to mix-and-match your way.

Experience the freedom of customizing your course pack with AcademicPub!
Not an educator but still interested in using this content? No problem! Visit our provider's page to contact the publisher and get permission directly.

Diamond field emission arrays (DFEAs) for high-power free electron lasers

By: Howell, M.; Ghosh, N.; Davidson, J.L.; Choi, B.K.; Jarvis, J.D.; Kang, W.P.; Wong, Y.M.; Brau, C.A.; Andrews, H.L.;

2009 / IEEE / 978-1-4244-3587-6


This item was taken from the IEEE Conference ' Diamond field emission arrays (DFEAs) for high-power free electron lasers ' Compared to the present prevalent use of photocathodes for free-electron lasers (FELs), the field-emitter array (FEAs) possesses several advantages as an electron source, namely, high brightness, ruggedness, no drive laser requirement and minimal heat generation. And, compared to Spindt-type molybdenum (Mo) and silicon-tips FEAs, diamond FEAs (DFEAs) have strong carbon-carbon covalent bonding (high activation energy for electromigration), are chemically inert, mechanically and thermally stable, with a low sputter coefficient (resistant to bombardment of positive ions) and low electron affinity for efficient electron emission.