.. auto-generated by script ../../../../utils/nxdl2rst.py from the NXDL source NXpulser_apm.nxdl.xml .. index:: ! NXpulser_apm (base class) ! pulser_apm (base class) see: pulser_apm (base class); NXpulser_apm .. _NXpulser_apm: ============ NXpulser_apm ============ **Status**: base class, extends :ref:`NXobject` **Description**: Metadata for laser- and/or voltage-pulsing in atom probe microscopy. **Symbols**: The symbols used in the schema to specify e.g. dimensions of arrays. **n_ions**: Total number of ions collected. **Groups cited**: :ref:`NXbeam`, :ref:`NXcollection`, :ref:`NXfabrication`, :ref:`NXsource`, :ref:`NXtransformations` .. index:: NXfabrication (base class); used in base class, NXsource (base class); used in base class, NXtransformations (base class); used in base class, NXbeam (base class); used in base class, NXcollection (base class); used in base class **Structure**: .. _/NXpulser_apm/pulse_mode-field: .. index:: pulse_mode (field) **pulse_mode**: (optional) :ref:`NX_CHAR ` How is field evaporation physically triggered. Any of these values: ``laser`` | ``voltage`` | ``laser_and_voltage`` .. _/NXpulser_apm/pulse_frequency-field: .. index:: pulse_frequency (field) **pulse_frequency**: (optional) :ref:`NX_FLOAT ` {units=\ :ref:`NX_FREQUENCY `} Frequency with which the high voltage or laser pulser fires. .. _/NXpulser_apm/pulse_fraction-field: .. index:: pulse_fraction (field) **pulse_fraction**: (optional) :ref:`NX_FLOAT ` {units=\ :ref:`NX_DIMENSIONLESS `} Fraction of the pulse_voltage that is applied in addition to the standing_voltage at peak voltage of a pulse. .. _/NXpulser_apm/pulsed_voltage-field: .. index:: pulsed_voltage (field) **pulsed_voltage**: (optional) :ref:`NX_FLOAT ` (Rank: 1, Dimensions: [n_ions]) {units=\ :ref:`NX_VOLTAGE `} In laser pulsing mode the values will be zero so the this field is recommended. However, for voltage pulsing mode it is highly recommended that users report the pulsed_voltage. .. _/NXpulser_apm/standing_voltage-field: .. index:: standing_voltage (field) **standing_voltage**: (optional) :ref:`NX_FLOAT ` (Rank: 1, Dimensions: [n_ions]) {units=\ :ref:`NX_VOLTAGE `} Direct current voltage between the specimen and the (local electrode) in the case of local electrode atom probe (LEAP) instrument. .. _/NXpulser_apm/FABRICATION-group: **FABRICATION**: (optional) :ref:`NXfabrication` .. _/NXpulser_apm/laser_gun-group: **laser_gun**: (optional) :ref:`NXsource` Atom probe microscopes use controlled laser, voltage, or a combination of pulsing strategies to trigger the excitation and eventual field evaporation/emission of an ion during an experiment. .. _/NXpulser_apm/laser_gun/name-field: .. index:: name (field) **name**: (optional) :ref:`NX_CHAR ` Given name/alias. .. _/NXpulser_apm/laser_gun/wavelength-field: .. index:: wavelength (field) **wavelength**: (optional) :ref:`NX_FLOAT ` {units=\ :ref:`NX_WAVELENGTH `} Nominal wavelength of the laser radiation. .. _/NXpulser_apm/laser_gun/power-field: .. index:: power (field) **power**: (optional) :ref:`NX_FLOAT ` {units=\ :ref:`NX_POWER `} Nominal power of the laser source while illuminating the specimen. .. _/NXpulser_apm/laser_gun/pulse_energy-field: .. index:: pulse_energy (field) **pulse_energy**: (optional) :ref:`NX_FLOAT ` {units=\ :ref:`NX_ENERGY `} Average energy of the laser at peak of each pulse. .. _/NXpulser_apm/laser_gun/FABRICATION-group: **FABRICATION**: (optional) :ref:`NXfabrication` .. _/NXpulser_apm/laser_gun/TRANSFORMATIONS-group: **TRANSFORMATIONS**: (optional) :ref:`NXtransformations` Affine transformations which describe the geometry how the laser focusing optics/pinhole-attached coordinate system is defined, how it has to be transformed so that it aligns with the specimen coordinate system. A right-handed Cartesian coordinate system, the so-called laser space, should be assumed, whose positive z-axis points into the direction of the propagating laser beam. .. _/NXpulser_apm/laser_beam-group: **laser_beam**: (optional) :ref:`NXbeam` Details about specific positions along the focused laser beam which illuminates the (atom probe) specimen. .. _/NXpulser_apm/laser_beam/pinhole_position-group: **pinhole_position**: (optional) :ref:`NXcollection` Track time-dependent settings over the course of the measurement where the laser beam exits the focusing optics. .. _/NXpulser_apm/laser_beam/spot_position-group: **spot_position**: (optional) :ref:`NXcollection` Track time-dependent settings over the course of the measurement where the laser hits the specimen. Hypertext Anchors ----------------- List of hypertext anchors for all groups, fields, attributes, and links defined in this class. * :ref:`/NXpulser_apm/FABRICATION-group ` * :ref:`/NXpulser_apm/laser_beam-group ` * :ref:`/NXpulser_apm/laser_beam/pinhole_position-group ` * :ref:`/NXpulser_apm/laser_beam/spot_position-group ` * :ref:`/NXpulser_apm/laser_gun-group ` * :ref:`/NXpulser_apm/laser_gun/FABRICATION-group ` * :ref:`/NXpulser_apm/laser_gun/name-field ` * :ref:`/NXpulser_apm/laser_gun/power-field ` * :ref:`/NXpulser_apm/laser_gun/pulse_energy-field ` * :ref:`/NXpulser_apm/laser_gun/TRANSFORMATIONS-group ` * :ref:`/NXpulser_apm/laser_gun/wavelength-field ` * :ref:`/NXpulser_apm/pulse_fraction-field ` * :ref:`/NXpulser_apm/pulse_frequency-field ` * :ref:`/NXpulser_apm/pulse_mode-field ` * :ref:`/NXpulser_apm/pulsed_voltage-field ` * :ref:`/NXpulser_apm/standing_voltage-field ` **NXDL Source**: https://github.com/nexusformat/definitions/blob/main/base_classes/NXpulser_apm.nxdl.xml