4.3.3.1. NXaberration

Status:

base class, extends NXobject

Description:

Models for aberrations of electro-magnetic lenses in electron microscopy.

The notation follows O. Krivanek et al. (1999) and O. Krivanek et al. (2003) See also S. J. Pennycock and P. D. Nellist (page 44ff, and page 118ff) for further details, additional literature, and the unit of the coefficients. Consult Table 7-2 of Ibid. publication on how to convert between conventions of different groups/vendors.

Symbols:

No symbol table

Groups cited:

none

Structure:

c_1_0: (optional) NX_FLOAT {units=NX_LENGTH}

Defocus

c_1_2_a: (optional) NX_FLOAT {units=NX_LENGTH}

Two-fold astigmatism

c_1_2_b: (optional) NX_FLOAT {units=NX_LENGTH}

Two-fold astigmatism

c_2_1_a: (optional) NX_FLOAT {units=NX_LENGTH}

Second-order axial coma

c_2_1_b: (optional) NX_FLOAT {units=NX_LENGTH}

Second-order axial coma

c_2_3_a: (optional) NX_FLOAT {units=NX_LENGTH}

Threefold astigmatism

c_2_3_b: (optional) NX_FLOAT {units=NX_LENGTH}

Threefold astigmatism

c_3_0: (optional) NX_FLOAT {units=NX_LENGTH}

Spherical aberration

c_3_2_a: (optional) NX_FLOAT {units=NX_LENGTH}

Star aberration

c_3_2_b: (optional) NX_FLOAT {units=NX_LENGTH}

Star aberration

c_3_4_a: (optional) NX_FLOAT {units=NX_LENGTH}

Fourfold astigmatism

c_3_4_b: (optional) NX_FLOAT {units=NX_LENGTH}

Fourfold astigmatism

c_5_0: (optional) NX_FLOAT {units=NX_LENGTH}

Fifth-order spherical aberration

Hypertext Anchors

List of hypertext anchors for all groups, fields, attributes, and links defined in this class.

NXDL Source:

https://github.com/nexusformat/definitions/blob/main/contributed_definitions/NXaberration.nxdl.xml