charge_exchange¶
Charge exchange spectroscopy diagnostic
Maximum occurrences (MDS+ backend only): 4
New in version 3.0.4: lifecycle status alpha
Changed in version 4.1.0.
ids_propertiesstructure¶
See common IDS structure reference: ids_properties.
aperturestructure¶Description of the collimating aperture of the diagnostic, fill […]
Description of the collimating aperture of the diagnostic, fill if relevant to all lines-of-sight (channels)
aperture/geometry_typeINT_0D¶Type of geometry used to describe the surface of the detector […]
Type of geometry used to describe the surface of the detector or aperture (1:’outline’, 2:’circular’, 3:’rectangle’). In case of ‘outline’, the surface is described by an outline of point in a local coordinate system defined by a centre and three unit vectors X1, X2, X3. Note that there is some flexibility here and the data provider should choose the most convenient coordinate system for the object, respecting the definitions of (X1,X2,X3) indicated below. In case of ‘circular’, the surface is a circle defined by its centre, radius, and normal vector oriented towards the plasma X3. In case of ‘rectangle’, the surface is a rectangle defined by its centre, widths in the X1 and X2 directions, and normal vector oriented towards the plasma X3.
aperture/centrestructure¶If geometry_type=2, coordinates of the centre of the circle. […]
If geometry_type=2, coordinates of the centre of the circle. If geometry_type=1 or 3, coordinates of the origin of the local coordinate system (X1,X2,X3) describing the plane detector/aperture. This origin is located within the detector/aperture area.
aperture/radius ⇹mFLT_0D¶Radius of the circle, used only if geometry_type = 2
Radius of the circle, used only if geometry_type = 2
aperture/x1_unit_vectorstructure¶Components of the X1 direction unit vector in the (X,Y,Z) coordinate […]
Components of the X1 direction unit vector in the (X,Y,Z) coordinate system, where X is the major radius axis for phi = 0, Y is the major radius axis for phi = pi/2, and Z is the height axis. The X1 vector is more horizontal than X2 (has a smaller abs(Z) component) and oriented in the positive phi direction (counter-clockwise when viewing from above).
aperture/x2_unit_vectorstructure¶Components of the X2 direction unit vector in the (X,Y,Z) coordinate […]
Components of the X2 direction unit vector in the (X,Y,Z) coordinate system, where X is the major radius axis for phi = 0, Y is the major radius axis for phi = pi/2, and Z is the height axis. The X2 axis is orthonormal so that uX2 = uX3 x uX1.
aperture/x3_unit_vectorstructure¶Components of the X3 direction unit vector in the (X,Y,Z) coordinate […]
Components of the X3 direction unit vector in the (X,Y,Z) coordinate system, where X is the major radius axis for phi = 0, Y is the major radius axis for phi = pi/2, and Z is the height axis. The X3 axis is normal to the detector/aperture plane and oriented towards the plasma.
aperture/x1_width ⇹mFLT_0D¶Full width of the aperture in the X1 direction, used only if […]
Full width of the aperture in the X1 direction, used only if geometry_type = 3
aperture/x2_width ⇹mFLT_0D¶Full width of the aperture in the X2 direction, used only if […]
Full width of the aperture in the X2 direction, used only if geometry_type = 3
aperture/outlinestructure¶Irregular outline of the detector/aperture in the (X1, X2) coordinate […]
Irregular outline of the detector/aperture in the (X1, X2) coordinate system. Repeat the first point since this is a closed contour
Changed in version 4: Since this describes a closed countour first point must now be repeated at the end of the coordinate arrays of the children
etendue ⇹m^2.srFLT_0D¶Etendue (geometric extent) of the optical system, fill if relevant […]
Etendue (geometric extent) of the optical system, fill if relevant to all lines-of-sight (channels)
etendue_methodstructure¶Method used to calculate the etendue. […]
Method used to calculate the etendue. Index = 0 : exact calculation with a 4D integral; 1 : approximation with first order formula (detector surface times solid angle subtended by the apertures); 2 : other methods
channel(i1)AoS¶Set of channels (lines-of-sight). […]
Set of channels (lines-of-sight). The line-of-sight is defined by the centre of the collimating aperture and the position of the measurements.
Maximum occurrences (MDS+ backend only): 100
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channel(i1)/nameSTR_0D¶Short string identifier (unique for a given device)
Short string identifier (unique for a given device)
channel(i1)/descriptionSTR_0D¶Description, e.g. […]
Description, e.g. “channel viewing the upper divertor”
New in version >3.
channel(i1)/aperturestructure¶Description of the collimating aperture for this channel
Description of the collimating aperture for this channel
New in version >4.0.0.
channel(i1)/aperture/geometry_typeINT_0D¶Type of geometry used to describe the surface of the detector […]
Type of geometry used to describe the surface of the detector or aperture (1:’outline’, 2:’circular’, 3:’rectangle’). In case of ‘outline’, the surface is described by an outline of point in a local coordinate system defined by a centre and three unit vectors X1, X2, X3. Note that there is some flexibility here and the data provider should choose the most convenient coordinate system for the object, respecting the definitions of (X1,X2,X3) indicated below. In case of ‘circular’, the surface is a circle defined by its centre, radius, and normal vector oriented towards the plasma X3. In case of ‘rectangle’, the surface is a rectangle defined by its centre, widths in the X1 and X2 directions, and normal vector oriented towards the plasma X3.
channel(i1)/aperture/centrestructure¶If geometry_type=2, coordinates of the centre of the circle. […]
If geometry_type=2, coordinates of the centre of the circle. If geometry_type=1 or 3, coordinates of the origin of the local coordinate system (X1,X2,X3) describing the plane detector/aperture. This origin is located within the detector/aperture area.
channel(i1)/aperture/radius ⇹mFLT_0D¶Radius of the circle, used only if geometry_type = 2
Radius of the circle, used only if geometry_type = 2
channel(i1)/aperture/x1_unit_vectorstructure¶Components of the X1 direction unit vector in the (X,Y,Z) coordinate […]
Components of the X1 direction unit vector in the (X,Y,Z) coordinate system, where X is the major radius axis for phi = 0, Y is the major radius axis for phi = pi/2, and Z is the height axis. The X1 vector is more horizontal than X2 (has a smaller abs(Z) component) and oriented in the positive phi direction (counter-clockwise when viewing from above).
channel(i1)/aperture/x2_unit_vectorstructure¶Components of the X2 direction unit vector in the (X,Y,Z) coordinate […]
Components of the X2 direction unit vector in the (X,Y,Z) coordinate system, where X is the major radius axis for phi = 0, Y is the major radius axis for phi = pi/2, and Z is the height axis. The X2 axis is orthonormal so that uX2 = uX3 x uX1.
channel(i1)/aperture/x3_unit_vectorstructure¶Components of the X3 direction unit vector in the (X,Y,Z) coordinate […]
Components of the X3 direction unit vector in the (X,Y,Z) coordinate system, where X is the major radius axis for phi = 0, Y is the major radius axis for phi = pi/2, and Z is the height axis. The X3 axis is normal to the detector/aperture plane and oriented towards the plasma.
channel(i1)/aperture/x1_width ⇹mFLT_0D¶Full width of the aperture in the X1 direction, used only if […]
Full width of the aperture in the X1 direction, used only if geometry_type = 3
channel(i1)/aperture/x2_width ⇹mFLT_0D¶Full width of the aperture in the X2 direction, used only if […]
Full width of the aperture in the X2 direction, used only if geometry_type = 3
channel(i1)/aperture/outlinestructure¶Irregular outline of the detector/aperture in the (X1, X2) coordinate […]
Irregular outline of the detector/aperture in the (X1, X2) coordinate system. Repeat the first point since this is a closed contour
Changed in version 4: Since this describes a closed countour first point must now be repeated at the end of the coordinate arrays of the children
channel(i1)/etendue ⇹m^2.srFLT_0D¶Etendue (geometric extent) of the optical system for this channel
Etendue (geometric extent) of the optical system for this channel
New in version >4.0.0.
channel(i1)/etendue_methodstructure¶Method used to calculate the etendue. […]
Method used to calculate the etendue. Index = 0 : exact calculation with a 4D integral; 1 : approximation with first order formula (detector surface times solid angle subtended by the apertures); 2 : other methods
New in version >4.0.0.
channel(i1)/focal_length ⇹mFLT_0D¶Focal length of the collector lens
Focal length of the collector lens
New in version >4.0.0.
channel(i1)/cone_diameter ⇹mFLT_0D¶Diameter of the base of the optical cone at the entrance pupil
Diameter of the base of the optical cone at the entrance pupil
New in version >4.0.0.
channel(i1)/image_diameter ⇹mFLT_0D¶Diameter at the image plane (typically the diameter of the optical […]
Diameter at the image plane (typically the diameter of the optical fibre)
New in version >4.0.0.
channel(i1)/positionstructure¶Position of the measurements (assuming point emission)
Position of the measurements (assuming point emission)
channel(i1)/position/phiradstructure¶Toroidal angle (oriented counter-clockwise when viewing from […]
Toroidal angle (oriented counter-clockwise when viewing from above)
channel(i1)/t_i_averageeVstructure¶Ion temperature (averaged on charge states and ion species) at […]
Ion temperature (averaged on charge states and ion species) at the channel measurement point
channel(i1)/t_i_average_methodstructure¶Description of the method used to reconstruct the average ion […]
Description of the method used to reconstruct the average ion temperature
channel(i1)/zeff1structure¶Local ionic effective charge at the channel measurement point
Local ionic effective charge at the channel measurement point
channel(i1)/zeff_methodstructure¶Description of the method used to reconstruct the local effective […]
Description of the method used to reconstruct the local effective charge
channel(i1)/zeff_line_average1structure¶Ionic effective charge, line average along the channel line-of-sight
Ionic effective charge, line average along the channel line-of-sight
channel(i1)/zeff_line_average_methodstructure¶Description of the method used to reconstruct the line average […]
Description of the method used to reconstruct the line average effective charge
channel(i1)/momentum_phikg.m^-1.s^-1structure¶Total plasma toroidal momentum, summed over ion species and electrons […]
Total plasma toroidal momentum, summed over ion species and electrons weighted by their density and major radius, i.e. sum_over_species(n*R*m*Vphi), at the channel measurement point
Changed in version 3.42.0: Renamed from momentum_tor
channel(i1)/momentum_phi_methodstructure¶Description of the method used to reconstruct the total plasma […]
Description of the method used to reconstruct the total plasma toroidal momentum
Changed in version 3.42.0: Renamed from momentum_tor_method
channel(i1)/ion(i2)AoS¶Physical quantities related to ion species and charge stage (H+, […]
Physical quantities related to ion species and charge stage (H+, D+, T+, He+2, Li+3, Be+4, C+6, N+7, O+8, Ne+10, Si+14, Ar+16 or Ar+18) derived from the measured charge exchange emission of each species, at the position of the measurement
Maximum occurrences (MDS+ backend only): 13
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channel(i1)/ion(i2)/z_neINT_0D¶Nuclear charge
Nuclear charge
Changed in version 4.0.0: Type changed from FLT_0D
channel(i1)/ion(i2)/nameSTR_0D¶String identifying the ion (e.g. […]
String identifying the ion (e.g. H+, D+, T+, He+2, C+6, …)
Changed in version 3.42.0: Renamed from label
channel(i1)/ion(i2)/t_ieVstructure¶Ion temperature at the channel measurement point
Ion temperature at the channel measurement point
channel(i1)/ion(i2)/t_i_methodstructure¶Description of the method used to derive the ion temperature
Description of the method used to derive the ion temperature
channel(i1)/ion(i2)/velocity_phim.s^-1structure¶Toroidal velocity of the ion (oriented counter-clockwise when […]
Toroidal velocity of the ion (oriented counter-clockwise when seen from above) at the channel measurement point
Changed in version 3.42.0: Renamed from velocity_tor
channel(i1)/ion(i2)/velocity_phi_methodm.s^-1structure¶Description of the method used to reconstruct the ion toroidal […]
Description of the method used to reconstruct the ion toroidal velocity
Changed in version 3.42.0: Renamed from velocity_tor_method
channel(i1)/ion(i2)/velocity_polm.s^-1structure¶Poloidal velocity of the ion (oriented clockwise when seen from […]
Poloidal velocity of the ion (oriented clockwise when seen from front on the right side of the tokamak axi-symmetry axis) at the channel measurement point
channel(i1)/ion(i2)/velocity_pol_methodstructure¶Description of the method used to reconstruct the ion poloidal […]
Description of the method used to reconstruct the ion poloidal velocity
channel(i1)/ion(i2)/n_i_over_n_e1structure¶Ion concentration (ratio of the ion density over the electron […]
Ion concentration (ratio of the ion density over the electron density) at the channel measurement point
channel(i1)/ion(i2)/n_i_over_n_e_methodstructure¶Description of the method used to derive the ion concentration
Description of the method used to derive the ion concentration
channel(i1)/besstructure¶Derived Beam Emission Spectroscopy (BES) parameters
Derived Beam Emission Spectroscopy (BES) parameters
channel(i1)/bes/a ⇹uFLT_0D¶Mass of atom of the diagnostic neutral beam particle
Mass of atom of the diagnostic neutral beam particle
channel(i1)/bes/z_ion ⇹eFLT_0D¶Ion charge of the diagnostic neutral beam particle
Ion charge of the diagnostic neutral beam particle
channel(i1)/bes/z_neINT_0D¶Nuclear charge of the diagnostic neutral beam particle
Nuclear charge of the diagnostic neutral beam particle
Changed in version 4.0.0: Type changed from FLT_0D
channel(i1)/bes/nameSTR_0D¶String identifying the diagnostic neutral beam particle
String identifying the diagnostic neutral beam particle
Changed in version 3.42.0: Renamed from label
channel(i1)/bes/transition_wavelength ⇹mFLT_0D¶Unshifted wavelength of the BES transition
Unshifted wavelength of the BES transition
channel(i1)/bes/doppler_shiftmstructure¶Doppler shift due to the diagnostic neutral beam particle velocity
Doppler shift due to the diagnostic neutral beam particle velocity
channel(i1)/bes/lorentz_shiftmstructure¶Lorentz shift due to the Lorentz electric field (vxB) in the […]
Lorentz shift due to the Lorentz electric field (vxB) in the frame of the diagnostic neutral beam particles moving with a velocity v across the magnetic field B
channel(i1)/bes/radiancesm^-2.s^-1.sr^-1structure¶Calibrated intensities of the 9 splitted lines (Stark effect […]
Calibrated intensities of the 9 splitted lines (Stark effect due to Lorentz electric field). Note: radiances are integrated over the sightline crossing the neutral beam
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channel(i1)/ion_fast(i2)AoS¶Derived Fast Ion Charge eXchange (FICX) parameters
Derived Fast Ion Charge eXchange (FICX) parameters
Maximum occurrences (MDS+ backend only): 5
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channel(i1)/ion_fast(i2)/z_neINT_0D¶Nuclear charge of the fast ion
Nuclear charge of the fast ion
Changed in version 4.0.0: Type changed from FLT_0D
channel(i1)/ion_fast(i2)/nameSTR_0D¶String identifying the fast ion (e.g. […]
String identifying the fast ion (e.g. H+, D+, T+, He+2, C+6, …)
Changed in version 3.42.0: Renamed from label
channel(i1)/ion_fast(i2)/transition_wavelength ⇹mFLT_0D¶Unshifted wavelength of the fast ion charge exchange transition
Unshifted wavelength of the fast ion charge exchange transition
channel(i1)/ion_fast(i2)/radiancem^-2.s^-1.sr^-1structure¶Calibrated radiance of the fast ion charge exchange spectrum […]
Calibrated radiance of the fast ion charge exchange spectrum assuming the shape is pre-defined (e.g. by the Fokker-Planck slowing-down function). Note: radiance is integrated over the sightline crossing the neutral beam
channel(i1)/ion_fast(i2)/radiance_spectral_methodstructure¶Description of the method used to reconstruct the fast ion charge […]
Description of the method used to reconstruct the fast ion charge exchange spectrum (e.g. what pre-defined slowing-down and source functions used)
channel(i1)/ion_fast(i2)/radiance_spectral_method/nameSTR_0D¶Short string identifier
Short string identifier
channel(i1)/spectrum(i2)AoS¶Set of spectra obtained by various gratings
Set of spectra obtained by various gratings
Maximum occurrences (MDS+ backend only): 3
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channel(i1)/spectrum(i2)/grating ⇹m^-1FLT_0D¶Number of grating lines per unit length
Number of grating lines per unit length
channel(i1)/spectrum(i2)/slit_width ⇹mFLT_0D¶Width of the slit (placed in the object focal plane)
Width of the slit (placed in the object focal plane)
channel(i1)/spectrum(i2)/instrument_function(:,:) ⇹mFLT_2D¶Array of Gaussian widths and amplitudes which as a sum make up […]
Array of Gaussian widths and amplitudes which as a sum make up the instrument fuction. IF(lambda) = sum( instrument_function(1,i)/sqrt(2 * pi * instrument_function(2,i)^2 ) * exp( -lambda^2/(2 * instrument_function(2,i)^2) ) ),whereby sum( instrument_function(1,i) ) = 1
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channel(i1)/spectrum(i2)/intensity_spectrums^-1structure¶Intensity spectrum (not calibrated), i.e. […]
Intensity spectrum (not calibrated), i.e. number of photoelectrons detected by unit time by a wavelength pixel of the channel, taking into account electronic gain compensation and channels relative calibration
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channel(i1)/spectrum(i2)/radiance_spectralm^-2.s^-1.sr^-1.m^-1structure¶Calibrated spectral radiance (radiance per unit wavelength)
Calibrated spectral radiance (radiance per unit wavelength)
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channel(i1)/spectrum(i2)/processed_line(i3)AoS¶Set of processed spectral lines
Set of processed spectral lines
Maximum occurrences (MDS+ backend only): 5
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channel(i1)/spectrum(i2)/processed_line(i3)/nameSTR_0D¶String identifying the processed spectral line: Spectroscopy […]
String identifying the processed spectral line: Spectroscopy notation emitting element (e.g. D I, Be IV, W I, C VI), transition - if known - between round brackets (e.g. (3-2) ) and indication type of charge exchange - if applicable - between square brackets (e.g. [ACX] or [PCX]). Example for beryllium active charge exchange line at 468.5 nm: ‘Be IV (8-6) [ACX]’. Example for impact excitation tungsten line coming from the plasma edge: ‘W I’
Changed in version 3.42.0: Renamed from label
channel(i1)/spectrum(i2)/processed_line(i3)/wavelength_central ⇹mFLT_0D¶Unshifted central wavelength of the processed spectral line
Unshifted central wavelength of the processed spectral line
channel(i1)/spectrum(i2)/processed_line(i3)/radiancem^-2.s^-1.sr^-1structure¶Calibrated, background subtracted radiance (integrated over the […]
Calibrated, background subtracted radiance (integrated over the spectrum for this line)
channel(i1)/spectrum(i2)/processed_line(i3)/intensitys^-1structure¶Non-calibrated intensity (integrated over the spectrum for this […]
Non-calibrated intensity (integrated over the spectrum for this line), i.e. number of photoelectrons detected by unit time, taking into account electronic gain compensation and channels relative calibration
channel(i1)/spectrum(i2)/processed_line(i3)/widthmstructure¶Full width at Half Maximum (FWHM) of the emission line
Full width at Half Maximum (FWHM) of the emission line
channel(i1)/spectrum(i2)/processed_line(i3)/shiftmstructure¶Shift of the emission line wavelength with respected to the unshifted […]
Shift of the emission line wavelength with respected to the unshifted cental wavelength (e.g. Doppler shift)
channel(i1)/spectrum(i2)/radiance_calibration(:) ⇹m^-3.sr^-1FLT_1D¶Radiance calibration
Radiance calibration
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channel(i1)/spectrum(i2)/radiance_calibration_dateSTR_0D¶Date of the radiance calibration (yyyy_mm_dd)
Date of the radiance calibration (yyyy_mm_dd)
channel(i1)/spectrum(i2)/wavelength_calibration_dateSTR_0D¶Date of the wavelength calibration (yyyy_mm_dd)
Date of the wavelength calibration (yyyy_mm_dd)
channel(i1)/spectrum(i2)/radiance_continuumm^-2.s^-1.sr^-1.m^-1structure¶Calibrated continuum intensity in the middle of the spectrum […]
Calibrated continuum intensity in the middle of the spectrum per unit wavelength
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