3.3.3.8. NXaberration_model

Status:

base class, extends NXobject

Description:

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

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

See S. J. Pennycock and P. D. Nellist (page 44ff, and page 118ff) for different definitions available and further details. Table 7-2 of Ibid. publication (page 305ff) documents how to convert from the NION to the CEOS definitions.

Symbols:

No symbol table

Groups cited:

NXaberration

Structure:

model: (optional) NX_CHAR

Any of these values: ceos | nion

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

ABERRATION: (optional) NXaberration

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_model.nxdl.xml