Abstract
We establish the normalized intrinsic emittance for cold emission
cathodes, associated with the energy and angular spread of the emitted particles directly on the surface of the emitter for a given local field
applied. While in principle we are motivated primarily by carbonnanotube (CNT) cathodes, our approach is applicable to any type of
cold cathode. Its essence relies on the evaluation of the initial momentum as the particles tunnel through the Schottky-Nordheim barrier based on the spectral radiance function. Next, the momentum
distribution is integrated over the geometry, providing, along with well
known Fowler-Nordheim current, an integral expression for the emittance. According to our theoretical results and based on experimental data for CNT emitters available in the literature, we predict that
practical cold emission cathodes may provide a normalized intrinsic
emittance comparable or even superior to that of conventional photoemission cathodes used in state-of-the-art electron sources.
WEPAB147 Simulations of Nanoblade-Enhanced Laser-Induced Cath
cathodes, associated with the energy and angular spread of the emitted particles directly on the surface of the emitter for a given local field
applied. While in principle we are motivated primarily by carbonnanotube (CNT) cathodes, our approach is applicable to any type of
cold cathode. Its essence relies on the evaluation of the initial momentum as the particles tunnel through the Schottky-Nordheim barrier based on the spectral radiance function. Next, the momentum
distribution is integrated over the geometry, providing, along with well
known Fowler-Nordheim current, an integral expression for the emittance. According to our theoretical results and based on experimental data for CNT emitters available in the literature, we predict that
practical cold emission cathodes may provide a normalized intrinsic
emittance comparable or even superior to that of conventional photoemission cathodes used in state-of-the-art electron sources.
WEPAB147 Simulations of Nanoblade-Enhanced Laser-Induced Cath
| Original language | American English |
|---|---|
| State | Published - 2021 |
| Event | 12th International Particle Accelerator Conference - Duration: 24 May 2021 → 28 May 2021 Conference number: 12th https://www.ipac21.org/index.php# |
Conference
| Conference | 12th International Particle Accelerator Conference |
|---|---|
| Abbreviated title | IPAC2021 |
| Period | 24/05/21 → 28/05/21 |
| Internet address |