ITER Physics Data Model Documentation for interferometer
Interferometer diagnostic
Notation of array of structure indices: itime indicates a time index; i1, i2, i3, ... indicate other indices with their depth in the IDS. This notation clarifies the path of a given node, but should not be used to compare indices of different nodes (they may have different meanings).
Lifecycle status: alpha since version 3.15.0
Last change occured on version: 3.33.0
You are now in flat display mode, note that errorbars are not visible in this modeFull path name | Description | Data Type | Coordinates |
ids_properties | Interface Data Structure properties. This element identifies the node above as an IDS | structure | |
ids_properties/comment | Any comment describing the content of this IDS {constant} | STR_0D | |
ids_properties/homogeneous_time | This node must be filled (with 0, 1, or 2) for the IDS to be valid. If 1, the time of this IDS is homogeneous, i.e. the time values for this IDS are stored in the time node just below the root of this IDS. If 0, the time values are stored in the various time fields at lower levels in the tree. In the case only constant or static nodes are filled within the IDS, homogeneous_time must be set to 2 {constant} | INT_0D | |
ids_properties/source Lifecycle status: obsolescent since version 3.34.0 |
Source of the data (any comment describing the origin of the data : code, path to diagnostic signals, processing method, ...). Superseeded by the new provenance structure. {constant} | STR_0D | |
ids_properties/provider | Name of the person in charge of producing this data {constant} | STR_0D | |
ids_properties/creation_date | Date at which this data has been produced {constant} | STR_0D | |
ids_properties/version_put | Version of the access layer package used to PUT this IDS | structure | |
ids_properties/version_put/data_dictionary | Version of Data Dictionary used to PUT this IDS {constant} | STR_0D | |
ids_properties/version_put/access_layer | Version of Access Layer used to PUT this IDS {constant} | STR_0D | |
ids_properties/version_put/access_layer_language | Programming language of the Access Layer high level API used to PUT this IDS {constant} | STR_0D | |
ids_properties/provenance Lifecycle status: alpha since version 3.34.0 |
Provenance information about this IDS | structure | |
ids_properties/provenance/node(i1) | Set of IDS nodes for which the provenance is given. The provenance information applies to the whole structure below the IDS node. For documenting provenance information for the whole IDS, set the size of this array of structure to 1 and leave the child "path" node empty {constant} | struct_array [max_size=20 (limited in MDS+ backend only)] |
1- 1...N |
ids_properties/provenance/node(i1)/path | Path of the node within the IDS, following the syntax given in the link below. If empty, means the provenance information applies to the whole IDS. Click here for further documentation. {constant} | STR_0D | |
ids_properties/provenance/node(i1)/sources(:) | List of sources used to import or calculate this node, identified as explained below. In case the node is the result of of a calculation / data processing, the source is an input to the process described in the "code" structure at the root of the IDS. The source can be an IDS (identified by a URI or a persitent identifier, see syntax in the link below) or non-IDS data imported directly from an non-IMAS database (identified by the command used to import the source, or the persistent identifier of the data source). Often data are obtained by a chain of processes, however only the last process input are recorded here. The full chain of provenance has then to be reconstructed recursively from the provenance information contained in the data sources. Click here for further documentation. {constant} | STR_1D |
1- 1...N |
ids_properties/plugins Lifecycle status: alpha since version 3.39.0 |
Information about the plugins used to write/read this IDS. This structure is filled automatically by the Access Layer at GET/PUT time, no need to fill it via a user program.. Introduced after DD version 3.38.1 | structure | |
ids_properties/plugins/node(i1) | Set of IDS nodes for which a plugin has been applied {constant} | struct_array [max_size=20 (limited in MDS+ backend only)] |
1- 1...N |
ids_properties/plugins/node(i1)/path | Path of the node within the IDS, following the syntax given in the link below. If empty, means the plugin applies to the whole IDS. Click here for further documentation. {constant} | STR_0D | |
ids_properties/plugins/node(i1)/put_operation(i2) | Plugins used to PUT a node (potentially, multiple plugins can be applied, if so they are listed by order of application) | struct_array [max_size=10 (limited in MDS+ backend only)] |
1- 1...N |
ids_properties/plugins/node(i1)/put_operation(i2)/name | Name of software used {constant} | STR_0D | |
ids_properties/plugins/node(i1)/put_operation(i2)/description | Short description of the software (type, purpose) {constant}. Introduced after DD version 3.38.1 | STR_0D | |
ids_properties/plugins/node(i1)/put_operation(i2)/commit | Unique commit reference of software {constant} | STR_0D | |
ids_properties/plugins/node(i1)/put_operation(i2)/version | Unique version (tag) of software {constant} | STR_0D | |
ids_properties/plugins/node(i1)/put_operation(i2)/repository | URL of software repository {constant} | STR_0D | |
ids_properties/plugins/node(i1)/put_operation(i2)/parameters | List of the code specific parameters in XML format {constant} | STR_0D | |
ids_properties/plugins/node(i1)/readback(i2) | Plugins to be used to read back a node (potentially, multiple plugins can be applied, listed in reverse order of application) | struct_array [max_size=10 (limited in MDS+ backend only)] |
1- 1...N |
ids_properties/plugins/node(i1)/readback(i2)/name | Name of software used {constant} | STR_0D | |
ids_properties/plugins/node(i1)/readback(i2)/description | Short description of the software (type, purpose) {constant}. Introduced after DD version 3.38.1 | STR_0D | |
ids_properties/plugins/node(i1)/readback(i2)/commit | Unique commit reference of software {constant} | STR_0D | |
ids_properties/plugins/node(i1)/readback(i2)/version | Unique version (tag) of software {constant} | STR_0D | |
ids_properties/plugins/node(i1)/readback(i2)/repository | URL of software repository {constant} | STR_0D | |
ids_properties/plugins/node(i1)/readback(i2)/parameters | List of the code specific parameters in XML format {constant} | STR_0D | |
ids_properties/plugins/node(i1)/get_operation(i2) | Plugins actually used to read back a node (potentially, multiple plugins can be applied, listed in reverse order of application). This information is filled by the plugin infrastructure during the GET operation. | struct_array [max_size=10 (limited in MDS+ backend only)] |
1- 1...N |
ids_properties/plugins/node(i1)/get_operation(i2)/name | Name of software used {constant} | STR_0D | |
ids_properties/plugins/node(i1)/get_operation(i2)/description | Short description of the software (type, purpose) {constant}. Introduced after DD version 3.38.1 | STR_0D | |
ids_properties/plugins/node(i1)/get_operation(i2)/commit | Unique commit reference of software {constant} | STR_0D | |
ids_properties/plugins/node(i1)/get_operation(i2)/version | Unique version (tag) of software {constant} | STR_0D | |
ids_properties/plugins/node(i1)/get_operation(i2)/repository | URL of software repository {constant} | STR_0D | |
ids_properties/plugins/node(i1)/get_operation(i2)/parameters | List of the code specific parameters in XML format {constant} | STR_0D | |
ids_properties/plugins/infrastructure_put | Plugin infrastructure used to PUT the data | structure | |
ids_properties/plugins/infrastructure_put/name | Name of software used {constant} | STR_0D | |
ids_properties/plugins/infrastructure_put/description | Short description of the software (type, purpose) {constant}. Introduced after DD version 3.38.1 | STR_0D | |
ids_properties/plugins/infrastructure_put/commit | Unique commit reference of software {constant} | STR_0D | |
ids_properties/plugins/infrastructure_put/version | Unique version (tag) of software {constant} | STR_0D | |
ids_properties/plugins/infrastructure_put/repository | URL of software repository {constant} | STR_0D | |
ids_properties/plugins/infrastructure_get | Plugin infrastructure used to GET the data | structure | |
ids_properties/plugins/infrastructure_get/name | Name of software used {constant} | STR_0D | |
ids_properties/plugins/infrastructure_get/description | Short description of the software (type, purpose) {constant}. Introduced after DD version 3.38.1 | STR_0D | |
ids_properties/plugins/infrastructure_get/commit | Unique commit reference of software {constant} | STR_0D | |
ids_properties/plugins/infrastructure_get/version | Unique version (tag) of software {constant} | STR_0D | |
ids_properties/plugins/infrastructure_get/repository | URL of software repository {constant} | STR_0D | |
channel(i1) | Set of channels (lines-of-sight) | struct_array [max_size=15 (limited in MDS+ backend only)] |
1- 1...N |
channel(i1)/name | Name of the channel {static} | STR_0D | |
channel(i1)/identifier | ID of the channel {static} | STR_0D | |
channel(i1)/line_of_sight | Description of the line of sight of the channel, defined by two points when the beam is not reflected, a third point is added to define the reflected beam path | structure | |
channel(i1)/line_of_sight/first_point | Position of the first point | structure | |
channel(i1)/line_of_sight/first_point/r | Major radius {static} [m] | FLT_0D | |
channel(i1)/line_of_sight/first_point/z | Height {static} [m] | FLT_0D | |
channel(i1)/line_of_sight/first_point/phi | Toroidal angle (oriented counter-clockwise when viewing from above) {static} [rad] | FLT_0D | |
channel(i1)/line_of_sight/second_point | Position of the second point | structure | |
channel(i1)/line_of_sight/second_point/r | Major radius {static} [m] | FLT_0D | |
channel(i1)/line_of_sight/second_point/z | Height {static} [m] | FLT_0D | |
channel(i1)/line_of_sight/second_point/phi | Toroidal angle (oriented counter-clockwise when viewing from above) {static} [rad] | FLT_0D | |
channel(i1)/line_of_sight/third_point | Position of the third point | structure | |
channel(i1)/line_of_sight/third_point/r | Major radius {static} [m] | FLT_0D | |
channel(i1)/line_of_sight/third_point/z | Height {static} [m] | FLT_0D | |
channel(i1)/line_of_sight/third_point/phi | Toroidal angle (oriented counter-clockwise when viewing from above) {static} [rad] | FLT_0D | |
channel(i1)/wavelength(i2) | Set of wavelengths used for interferometry | struct_array [max_size=2 (limited in MDS+ backend only)] |
1- 1...N |
channel(i1)/wavelength(i2)/value | Wavelength value {static} [m] | FLT_0D | |
channel(i1)/wavelength(i2)/phase_corrected | Phase measured for this wavelength, corrected from fringe jumps [rad] | structure | |
channel(i1)/wavelength(i2)/phase_corrected/data(:) | Data {dynamic} [as_parent] | FLT_1D |
1- channel(i1)/wavelength(i2)/phase_corrected/time |
channel(i1)/wavelength(i2)/phase_corrected/time(:) | Time {dynamic} [s] | FLT_1D |
1- 1...N |
channel(i1)/wavelength(i2)/fringe_jump_correction(:) | Signed number of 2pi phase corrections applied to remove a fringe jump, for each time slice on which a correction has been made {constant} | INT_1D |
1- channel(i1)/wavelength(i2)/fringe_jump_correction_times |
channel(i1)/wavelength(i2)/fringe_jump_correction_times(:) | List of time slices of the pulse on which a fringe jump correction has been made {constant} [s] | FLT_1D |
1- 1...N |
channel(i1)/wavelength(i2)/phase_to_n_e_line | Conversion factor to be used to convert phase into line density for this wavelength {static} [m^-2.rad^-1] | FLT_0D | |
channel(i1)/path_length_variation | Optical path length variation due to the plasma [m] | structure | |
channel(i1)/path_length_variation/data(:) | Data {dynamic} [as_parent] | FLT_1D |
1- channel(i1)/path_length_variation/time |
channel(i1)/path_length_variation/time(:) | Time {dynamic} [s] | FLT_1D |
1- 1...N |
channel(i1)/n_e_line | Line integrated density, possibly obtained by a combination of multiple interferometry wavelengths. Corresponds to the density integrated along the full line-of-sight (i.e. forward AND return for a reflected channel: NO dividing by 2 correction) [m^-2] | structure | |
channel(i1)/n_e_line/data(:) | Data {dynamic} [as_parent] | FLT_1D |
1- channel(i1)/n_e_line/time |
channel(i1)/n_e_line/validity_timed(:) | Indicator of the validity of the data for each time slice. 0: valid from automated processing, 1: valid and certified by the diagnostic RO; - 1 means problem identified in the data processing (request verification by the diagnostic RO), -2: invalid data, should not be used (values lower than -2 have a code-specific meaning detailing the origin of their invalidity) {dynamic} | INT_1D |
1- channel(i1)/n_e_line/time |
channel(i1)/n_e_line/validity | Indicator of the validity of the data for the whole acquisition period. 0: valid from automated processing, 1: valid and certified by the diagnostic RO; - 1 means problem identified in the data processing (request verification by the diagnostic RO), -2: invalid data, should not be used (values lower than -2 have a code-specific meaning detailing the origin of their invalidity) {constant} | INT_0D | |
channel(i1)/n_e_line/time(:) | Time {dynamic} [s] | FLT_1D |
1- 1...N |
channel(i1)/n_e_line_average | Line average density, possibly obtained by a combination of multiple interferometry wavelengths. Corresponds to the density integrated along the full line-of-sight and then divided by the length of the line-of-sight [m^-3] | structure | |
channel(i1)/n_e_line_average/data(:) | Data {dynamic} [as_parent] | FLT_1D |
1- channel(i1)/n_e_line_average/time |
channel(i1)/n_e_line_average/validity_timed(:) | Indicator of the validity of the data for each time slice. 0: valid from automated processing, 1: valid and certified by the diagnostic RO; - 1 means problem identified in the data processing (request verification by the diagnostic RO), -2: invalid data, should not be used (values lower than -2 have a code-specific meaning detailing the origin of their invalidity) {dynamic} | INT_1D |
1- channel(i1)/n_e_line_average/time |
channel(i1)/n_e_line_average/validity | Indicator of the validity of the data for the whole acquisition period. 0: valid from automated processing, 1: valid and certified by the diagnostic RO; - 1 means problem identified in the data processing (request verification by the diagnostic RO), -2: invalid data, should not be used (values lower than -2 have a code-specific meaning detailing the origin of their invalidity) {constant} | INT_0D | |
channel(i1)/n_e_line_average/time(:) | Time {dynamic} [s] | FLT_1D |
1- 1...N |
n_e_volume_average | Volume average plasma density estimated from the line densities measured by the various channels [m^-3] | structure | |
n_e_volume_average/data(:) | Data {dynamic} [as_parent] | FLT_1D |
1- n_e_volume_average/time |
n_e_volume_average/validity_timed(:) | Indicator of the validity of the data for each time slice. 0: valid from automated processing, 1: valid and certified by the diagnostic RO; - 1 means problem identified in the data processing (request verification by the diagnostic RO), -2: invalid data, should not be used (values lower than -2 have a code-specific meaning detailing the origin of their invalidity) {dynamic} | INT_1D |
1- n_e_volume_average/time |
n_e_volume_average/validity | Indicator of the validity of the data for the whole acquisition period. 0: valid from automated processing, 1: valid and certified by the diagnostic RO; - 1 means problem identified in the data processing (request verification by the diagnostic RO), -2: invalid data, should not be used (values lower than -2 have a code-specific meaning detailing the origin of their invalidity) {constant} | INT_0D | |
n_e_volume_average/time(:) | Time {dynamic} [s] | FLT_1D |
1- 1...N |
electrons_n | Total number of electrons in the plasma, estimated from the line densities measured by the various channels [-] | structure | |
electrons_n/data(:) | Data {dynamic} [as_parent] | FLT_1D |
1- electrons_n/time |
electrons_n/validity_timed(:) | Indicator of the validity of the data for each time slice. 0: valid from automated processing, 1: valid and certified by the diagnostic RO; - 1 means problem identified in the data processing (request verification by the diagnostic RO), -2: invalid data, should not be used (values lower than -2 have a code-specific meaning detailing the origin of their invalidity) {dynamic} | INT_1D |
1- electrons_n/time |
electrons_n/validity | Indicator of the validity of the data for the whole acquisition period. 0: valid from automated processing, 1: valid and certified by the diagnostic RO; - 1 means problem identified in the data processing (request verification by the diagnostic RO), -2: invalid data, should not be used (values lower than -2 have a code-specific meaning detailing the origin of their invalidity) {constant} | INT_0D | |
electrons_n/time(:) | Time {dynamic} [s] | FLT_1D |
1- 1...N |
latency | Upper bound of the delay between physical information received by the detector and data available on the real-time (RT) network. {static} [s]. Introduced after DD version 3.32.1 | FLT_0D | |
code | Generic decription of the code-specific parameters for the code that has produced this IDS | structure | |
code/name | Name of software generating IDS {constant} | STR_0D | |
code/description | Short description of the software (type, purpose) {constant}. Introduced after DD version 3.38.1 | STR_0D | |
code/commit | Unique commit reference of software {constant} | STR_0D | |
code/version | Unique version (tag) of software {constant} | STR_0D | |
code/repository | URL of software repository {constant} | STR_0D | |
code/parameters | List of the code specific parameters in XML format {constant} | STR_0D | |
code/output_flag(:) | Output flag : 0 means the run is successful, other values mean some difficulty has been encountered, the exact meaning is then code specific. Negative values mean the result shall not be used. {dynamic} | INT_1D |
1- time |
code/library(i1) | List of external libraries used by the code that has produced this IDS | struct_array [max_size=10 (limited in MDS+ backend only)] |
1- 1...N |
code/library(i1)/name | Name of software {constant} | STR_0D | |
code/library(i1)/description | Short description of the software (type, purpose) {constant}. Introduced after DD version 3.38.1 | STR_0D | |
code/library(i1)/commit | Unique commit reference of software {constant} | STR_0D | |
code/library(i1)/version | Unique version (tag) of software {constant} | STR_0D | |
code/library(i1)/repository | URL of software repository {constant} | STR_0D | |
code/library(i1)/parameters | List of the code specific parameters in XML format {constant} | STR_0D | |
time(:) | Generic time {dynamic} [s] | FLT_1D |
1- 1...N |