3.3.2.24. NXmpes_arpes

Status:

application definition, extends NXmpes

Description:

This is a general application definition for angle-resolved (multidimensional) ...

This is a general application definition for angle-resolved (multidimensional) photoelectron spectroscopy (ARPES).

Symbols:

No symbol table

Groups cited:

NXaperture, NXcollectioncolumn, NXcoordinate_system, NXdata, NXelectronanalyzer, NXenergydispersion, NXentry, NXinstrument, NXresolution, NXsample, NXtransformations

Structure:

ENTRY: (required) NXentry ⤆

definition: (required) NX_CHAR ⤆

Obligatory value: NXmpes_arpes

@version: (required) NX_CHAR ⤆

method: (recommended) NX_CHAR ⤆

Name of the experimental method. ...

Name of the experimental method.

If applicable, this name should match the terms given by Clause 11 of the ISO 18115-1:2023 specification.

Examples include:

  • angle-resolved photoelectron spectroscopy (ARPES)

  • time-resolved angle-resolved X-ray photoelectron spectroscopy (trARPES)

  • spin-resolved angle-resolved X-ray photoelectron spectroscopy (spin-ARPES)

arpes_geometry: (required) NXcoordinate_system ⤆

depends_on: (required) NX_CHAR ⤆

Link to transformations defining an ARPES base coordinate system, ...

Link to transformations defining an ARPES base coordinate system, which is defined such that the positive z-axis points towards the analyzer entry, and the x-axis lies within the beam/analyzer plane.

TRANSFORMATIONS: (required) NXtransformations ⤆

Set of transformations, describing the orientation of the ARPES coordinate ...

Set of transformations, describing the orientation of the ARPES coordinate system with respect to the beam coordinate system (.).

INSTRUMENT: (required) NXinstrument ⤆

angularN_resolution: (recommended) NXresolution ⤆

Overall angular resolution along the Nth angular axis. Create one such ent ...

Overall angular resolution along the Nth angular axis. Create one such entry per relevant angular axis, corresponding to the angular axes in NXdata. For hemispherical analyzers, angular0_resolution corresponds to the direction along the analyzer slit, and angular1_resolution to the one perpendicular to it.

physical_quantity: (required) NX_CHAR ⤆

Obligatory value: angle

type: (recommended) NX_CHAR ⤆

resolution: (required) NX_FLOAT {units=NX_ANGLE} ⤆

ELECTRONANALYZER: (required) NXelectronanalyzer ⤆

depends_on: (required) NX_CHAR ⤆

Reference to the last transformation describing the orientation of the a ...

Reference to the last transformation describing the orientation of the analyzer relative to the beam, e.g. transformations/analyzer_elevation.

angularN_resolution: (recommended) NXresolution ⤆

Analyzer angular resolution along the Nth angular axis. ...

Analyzer angular resolution along the Nth angular axis. Create one such entry per relevant angular axis, corresponding to the angular axes in NXdata. For hemispherical analyzers, angular0_resolution corresponds to the direction along the analyzer slit, and angular1_resolution to the one perpendicular to it.

physical_quantity: (required) NX_CHAR ⤆

Obligatory value: angle

type: (recommended) NX_CHAR ⤆

resolution: (required) NX_FLOAT {units=NX_ANGLE} ⤆

transformations: (required) NXtransformations ⤆

Set of transformations, describing the relative orientation of the analy ...

Set of transformations, describing the relative orientation of the analyzer with respect to the beam coordinate system (.).

analyzer_rotation: (required) NX_NUMBER {units=NX_ANGLE} ⤆

Rotation about the analyzer lens axis. ...

Rotation about the analyzer lens axis. Its zero reference is defined such that the angular0 axis is increasing towards the positive y axis (analyzer slit vertical).

@transformation_type: (required) NX_CHAR ⤆

Obligatory value: rotation

@vector: (required) NX_NUMBER ⤆

Obligatory value: [0, 0, 1]

@depends_on: (required) NX_CHAR ⤆

Path to a transformation that places the analyzer origin system into ...

Path to a transformation that places the analyzer origin system into the arpes_geometry coordinate system.

analyzer_elevation: (required) NX_NUMBER {units=NX_ANGLE} ⤆

Elevation of the effective analyzer acceptance area, e.g. realized by ...

Elevation of the effective analyzer acceptance area, e.g. realized by deflectors, or as one angle in a TOF detector. If a resolved angle, place the calibrated axis coordinates here.

@transformation_type: (required) NX_CHAR ⤆

Obligatory value: rotation

@vector: (required) NX_NUMBER ⤆

Obligatory value: [0, 1, 0]

@depends_on: (required) NX_CHAR ⤆

Obligatory value: analyzer_dispersion

analyzer_dispersion: (required) NX_NUMBER {units=NX_ANGLE} ⤆

In-plane analyzer coordinate along a dispersive direction, ...

In-plane analyzer coordinate along a dispersive direction, e.g. along an analyzer slit. If a resolved angle, place the calibrated coordinates here.

@transformation_type: (required) NX_CHAR ⤆

Obligatory value: rotation

@vector: (required) NX_NUMBER ⤆

Obligatory value: [1, 0, 0]

@depends_on: (required) NX_CHAR ⤆

Obligatory value: analyzer_rotation

COLLECTIONCOLUMN: (required) NXcollectioncolumn ⤆

scheme: (recommended) NX_CHAR ⤆

Scheme of the electron collection column. ...

Scheme of the electron collection column.

Any of these values: angular dispersive | non-dispersive

angular_acceptance: (recommended) NX_FLOAT ⤆

ENERGYDISPERSION: (required) NXenergydispersion ⤆

diameter: (recommended) NX_NUMBER {units=NX_LENGTH}

entrance_slit: (recommended) NXaperture ⤆

shape: (required) NX_CHAR ⤆

Any of these values: straight slit | curved slit

SAMPLE: (required) NXsample ⤆

situation: (required) NX_CHAR ⤆

Obligatory value: vacuum

depends_on: (required) NX_CHAR ⤆

Reference to the end of the transformation chain, ...

Reference to the end of the transformation chain, orienting the sample surface within the arpes_geometry coordinate system (sample_azimuth or anything depending on it).

transformations: (required) NXtransformations ⤆

Set of transformations, describing the relative orientation of the sample ...

Set of transformations, describing the relative orientation of the sample with respect to the arpes_geometry coordinate system.

sample_azimuth: (required) NX_NUMBER {units=NX_ANGLE} ⤆

Rotation about the z axis (azimuthal rotation within the sample plane).

@transformation_type: (required) NX_CHAR ⤆

Obligatory value: rotation

@vector: (required) NX_NUMBER ⤆

Obligatory value: [0, 0, 1]

@depends_on: (required) NX_CHAR ⤆

Obligatory value: offset_azimuth

offset_azimuth: (required) NX_NUMBER {units=NX_ANGLE} ⤆

Offset of azimuthal rotation.

@transformation_type: (required) NX_CHAR ⤆

Obligatory value: rotation

@vector: (required) NX_NUMBER ⤆

Obligatory value: [0, 0, 1]

@depends_on: (required) NX_CHAR ⤆

Obligatory value: sample_tilt

sample_tilt: (required) NX_NUMBER {units=NX_ANGLE} ⤆

Rotation about the x axis (typically a manipulator tilt).

@transformation_type: (required) NX_CHAR ⤆

Obligatory value: rotation

@vector: (required) NX_NUMBER ⤆

Obligatory value: [1, 0, 0]

@depends_on: (required) NX_CHAR ⤆

Obligatory value: offset_tilt

offset_tilt: (required) NX_NUMBER {units=NX_ANGLE} ⤆

Offset of tilt rotation.

@transformation_type: (required) NX_CHAR ⤆

Obligatory value: rotation

@vector: (required) NX_NUMBER ⤆

Obligatory value: [1, 0, 0]

@depends_on: (required) NX_CHAR ⤆

Obligatory value: sample_polar

sample_polar: (required) NX_NUMBER {units=NX_ANGLE} ⤆

Rotation about the y axis (typically the long manipulator axis).

@transformation_type: (required) NX_CHAR ⤆

Obligatory value: rotation

@vector: (required) NX_NUMBER ⤆

Obligatory value: [0, 1, 0]

@depends_on: (required) NX_CHAR ⤆

Obligatory value: offset_polar

offset_polar: (required) NX_NUMBER {units=NX_ANGLE} ⤆

Offset of polar rotation.

@transformation_type: (required) NX_CHAR ⤆

Obligatory value: rotation

@vector: (required) NX_NUMBER ⤆

Obligatory value: [0, 1, 0]

@depends_on: (required) NX_CHAR ⤆

Path to a transformation that places the sample surface ...

Path to a transformation that places the sample surface into the origin of the arpes_geometry coordinate system.

DATA: (required) NXdata ⤆

@signal: (required) NX_CHAR ⤆

There is a field named data that contains the signal. ...

There is a field named data that contains the signal.

Obligatory value: data

@axes: (required) NX_CHAR ⤆

There are three dimensions, one energy and two angular coordinates. Any co ...

There are three dimensions, one energy and two angular coordinates. Any coordinates that do not move, are represented by one point.

Obligatory value: ['angular0', 'angular1', 'energy']

@energy_indices: (required) NX_INT ⤆

@angular0_indices: (required) NX_INT ⤆

@angular1_indices: (required) NX_INT ⤆

energy: (required) NX_NUMBER {units=NX_ENERGY} ⤆

Values on the energy axis.

angular0: (required) NX_NUMBER {units=NX_ANGLE} ⤆

Trace of the first angular axis.

angular1: (required) NX_NUMBER {units=NX_ANGLE} ⤆

Trace of the second axis. Could be linked from the respective ``@reference ...

Trace of the second axis. Could be linked from the respective @reference field.

data: (required) NX_NUMBER {units=NX_ANY} ⤆

Represents a measurement of photoemission counts over a three-dimensional ...

Represents a measurement of photoemission counts over a three-dimensional space where the varied axes are energy, and one or more angular coordinates. Axes traces should be linked to the actual encoder position in NXinstrument or calibrated axes in NXprocess.

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/applications/NXmpes_arpes.nxdl.xml