Field emission from carbon nanotubes in DC and pulsed mode

Le Pimpec, F.; Gough, C.; Chouhan, V.; Kato, S.

doi:10.1016/j.nima.2011.08.043

Field emission from carbon nanotubes in DC and pulsed mode

Le Pimpec F, Gough C, Chouhan V & Kato S

Citation

Le Pimpec, F., Gough, C., Chouhan, V., & Kato, S. (2011). Field emission from carbon nanotubes in DC and pulsed mode. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 660(1), 7-14. https://doi.org/10.1016/j.nima.2011.08.043

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:14390

Multi-wall Carbon Nanotube (CNT) emitters were tested in a combined diode-RF electron gun. Field emission of the nanotubes was observed at 5-30 MV/m, using a 250 ns FWHM long pulse with a peak voltage of 80-470 kV. The field emission threshold is compatible with that found from previous DC testing. We have extracted from a continuous field emitter up to a nanoCoulomb of charge and measured an emittance of 4 mm mrad with a 2 pC electron beam. The total charge emission during RF operation, using the 1.5 GHz, 2 cell RF structure, was found dependent on its period. RF operation showed that back bombarding electrons with up to 5 MeV did not impair the emission stability of the CNTs.

Details

Publication Type

Journal Article

Title

Field emission from carbon nanotubes in DC and pulsed mode

Author(s)

Le Pimpec, F. (8413 SwissFEL Strahldynamik)

Gough, C. (8455 Pulsed Magnets)

Chouhan, V.

Kato, S.

Journal