Computer-aided design of free rotation and distortion doublet electromagnetic lenses

Edan, Zena H.; Abbas, Talib M.

doi:10.1016/j.matpr.2021.06.346

Cited by 2 publications

(3 citation statements)

References 6 publications

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“…Using the EOD program, the lens consists of two identical lenses, where the focal characteristics of the lens were calculated in the two maximum magnification regions by changing the magnetic flux density in one of the two lenses by changing the diameter of the axial bore. The results showed the possibility of obtaining a double electromagnetic lens for the projector, and it has a minimum focal length [5].…”

Section: Introductionmentioning

confidence: 93%

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Comparison Between the Properties of Three New Designs of Pinhole Magnetic Lens

Aljibory,

AL-Salih

2024

Tikrit J. Pure Sci.

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Three different new designs of an objective pinhole lens were compared. Their magnetic and optical properties were studied using Finite Element Method for Calculating Magnetic Field Distribution (FEM-CMFD) and Magnetic Electron Lens Optical Properties (MELOP) software. The focal length (fo), spherical aberration (Cs), chromatic aberration (Cc), and the resolving power (δ) of each lens were compared at a range of relatively corrected acceleration voltages (Vr = 100 V-100 kV) and a constant excitation of (NI = 5280 A-t (where A represents Ampere and t represents turn)) and current density (2 A/mm2) to find the best design. The L1 lens is similar to the Gemini lens. L2 and L3 are the traditional pinhole lens shape. The L1 lens gave the best results in terms of optical and magnetic properties as its optical properties at medium and low acceleration voltages. L2 and L3 Lenses had almost identical magnetic properties, but the difference was apparent in optical properties.

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Section: Introductionmentioning

confidence: 93%

“…Figure(5) shows the chromatic aberration of three proposed lenses at a range of relatively corrected acceleration voltages (Vr = 100 V -100 kV) and a constant excitation of (NI = 5280 A-t) and current density (2 A/mm 2 ).…”

mentioning

confidence: 99%

Comparison Between the Properties of Three New Designs of Pinhole Magnetic Lens

Aljibory,

AL-Salih

2024

Tikrit J. Pure Sci.

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“…This lens consists of two identical lenses. The focal characteristics and the projector of this lens were calculated in the two regions of maximum magnification by changing the axial magnetic flux density in one of the two monocular lenses by changing the axial bore diameter [16]. In 2021 AD, Basma Fayez Abdel Ghani and Ahmed Kamal Ahmed studied the design of magnetic lenses similar to its optimal conditions, where the geometric and optical properties of the magnetic lens were designed and analyzed using the EOD program.…”

Section: Introductionmentioning

confidence: 99%

Study of the Effect of the Geometry of the Inner Pole Arm of a Bipolar Lens

Al-Salih

Jasim

Ismaeel

2022

MJS

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Several innovative designs were designed for magnetic lenses, a bipolar lens with innovative and different geometric shapes, where the outer Inner pole side of the iron shroud, which is symbolized by the symbol (L), was changed. 2,4,6 A/mm2) and after it was designed, the engineering parameters were studied in terms of magnetic properties, i.e., calculating the magnetic flux density with different current densities, and then studying the optical properties in terms of spherical aberration as well as chromatic aberration. Which made slight changes to the magnetic and optical properties of the bipolar lens and led to an improvement in the performance of the lens because the resolving power increased its amount when the change was made, as well as the aberration where both spherical aberration and chromatic aberration decreased.

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Computer-aided design of free rotation and distortion doublet electromagnetic lenses

Cited by 2 publications

References 6 publications

Comparison Between the Properties of Three New Designs of Pinhole Magnetic Lens

Comparison Between the Properties of Three New Designs of Pinhole Magnetic Lens

Study of the Effect of the Geometry of the Inner Pole Arm of a Bipolar Lens

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