A SEMIEMPIRICAL FORMULA FOR THE SHAPE FACTOR OF EMISSION TIP IN GENERAL FIELDE MISSION SYSTEM

Yang Deqing; Song Hongjiang; Wang Zhi; Chen Ergang

Volume 12 Issue 6

Nov. 1990

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Article Navigation > Journal of Electronics & Information Technology > 1990 > 12(6): 660-665

Yang Deqing, Song Hongjiang, Wang Zhi, Chen Ergang. A SEMIEMPIRICAL FORMULA FOR THE SHAPE FACTOR OF EMISSION TIP IN GENERAL FIELDE MISSION SYSTEM[J]. Journal of Electronics & Information Technology, 1990, 12(6): 660-665.

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Yang Deqing, Song Hongjiang, Wang Zhi, Chen Ergang. A SEMIEMPIRICAL FORMULA FOR THE SHAPE FACTOR OF EMISSION TIP IN GENERAL FIELDE MISSION SYSTEM[J]. Journal of Electronics & Information Technology, 1990, 12(6): 660-665.

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A SEMIEMPIRICAL FORMULA FOR THE SHAPE FACTOR OF EMISSION TIP IN GENERAL FIELDE MISSION SYSTEM

Received Date: 1988-12-08
Rev Recd Date: 1900-01-01
Publish Date: 1990-11-19

Abstract

Abstract

A new formula (0.2/[(r0+h)ln (2h/r0)]) which is used to determine the shape factor of field emission tip is reported. By using of this formula, the calculation of with the tip shape of half spheroid, rotational ellipsoid, rotational paraboloid and rotational hyperboloid have been made and compared with the calculated value of by D. Selidovkin, W. Swanson and P. Dyke and numerical method. It is shown that the value of calculated by using of the new formula is consistent with the result of calculation by computer and is more precise than that calculated by using of other method.

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References(1)

References

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