On relation between the autoemitter top field, anode voltage and cathode geometry
A field emission diode has been made up on the basis of a flat metal anode and pin cathode (of the height a) that is mounted on a flat metal plate parallel to the anode. The potential of the field emission diode has been calculated as the function of the pin cathode shape, its height, the anode-...
Збережено в:
| Дата: | 2009 |
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| Автори: | , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Національний науковий центр «Харківський фізико-технічний інститут» НАН України
2009
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| Назва видання: | Вопросы атомной науки и техники |
| Теми: | |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/88307 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | On relation between the autoemitter top field, anode voltage and cathode geometry / B.V. Stetsenko, A.I. Shchurenko // Вопросы атомной науки и техники. — 2009. — № 1. — С. 136-138. — Бібліогр.: 8 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | A field emission diode has been made up on the basis of a flat metal anode and pin cathode (of the height a) that is
mounted on a flat metal plate parallel to the anode. The potential of the field emission diode has been calculated as the
function of the pin cathode shape, its height, the anode-cathode potential and the potential value into cathode. It has
been shown that the potential barrier transparency possesses a nonlinear dependence on the anode potential in the
Fowler-Nordheim coordinates, if the cathode height (a) is less than 1000 nm. To obtain a measurable field emission
current, the following condition should be met: Fmid·a>φ, were Fmid is the macroscopic field strength within the anodecathode
spacing, and φ is the pin cathode work function. Therefore, to get the field emission current, either the field
strength should be >10⁶ V/cm, or another field source should be used in addition. For example, the contact electrode
potential between the pin part of the cathode and its base can provide such a field source. An analytic function was
derived for the electric field of a pin cathode located on a flat substrate. |
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