lh_antennas¶
Antenna systems for heating and current drive in the Lower Hybrid (LH) frequencies. In the definitions below, the front (or mouth) of the antenna refers to the plasma facing side of the antenna, while the back refers to the waveguides connected side of the antenna (towards the RF generators).
Maximum occurrences (MDS+ backend only): 2
New in version 3.19.1: lifecycle status alpha
Changed in version 4.1.0.
ids_propertiesstructure¶
See common IDS structure reference: ids_properties.
reference_pointstructure¶Reference point used to define the poloidal angle, e.g. […]
Reference point used to define the poloidal angle, e.g. the geometrical centre of the vacuum vessel. Used to define the poloidal refraction index under antenna/row
antenna(i1)AoS¶Set of Lower Hybrid antennas
Set of Lower Hybrid antennas
Maximum occurrences (MDS+ backend only): 2
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antenna(i1)/nameSTR_0D¶Short string identifier (unique for a given device)
Short string identifier (unique for a given device)
antenna(i1)/descriptionSTR_0D¶Description, e.g. […]
Description, e.g. “channel viewing the upper divertor”
New in version >3.
antenna(i1)/model_nameSTR_0D¶Name of the antenna model used for antenna spectrum computation
Name of the antenna model used for antenna spectrum computation
antenna(i1)/power_launchedWstructure¶Power launched from this antenna into the vacuum vessel
Power launched from this antenna into the vacuum vessel
antenna(i1)/power_forwardWstructure¶Forward power arriving at the back of the antenna
Forward power arriving at the back of the antenna
antenna(i1)/power_reflectedWstructure¶Reflected power
Reflected power
antenna(i1)/reflection_coefficient1structure¶Power reflection coefficient, averaged over modules
Power reflection coefficient, averaged over modules
antenna(i1)/phase_averageradstructure¶Phase difference between two neighbouring modules (average over […]
Phase difference between two neighbouring modules (average over modules), at the mouth (front) of the antenna
antenna(i1)/n_parallel_peak1structure¶Peak parallel refractive index of the launched wave spectrum […]
Peak parallel refractive index of the launched wave spectrum (simple estimate based on the measured phase difference)
antenna(i1)/positionstructure¶Position of a reference point on the antenna (allowing also tracking […]
Position of a reference point on the antenna (allowing also tracking the possible movements of the antenna)
antenna(i1)/position/definitionSTR_0D¶Definition of the reference point
Definition of the reference point
antenna(i1)/position/phiradstructure¶Toroidal angle (oriented counter-clockwise when viewing from […]
Toroidal angle (oriented counter-clockwise when viewing from above)
antenna(i1)/pressure_tankPastructure¶Pressure in the vacuum tank of the antenna
Pressure in the vacuum tank of the antenna
antenna(i1)/distance_to_antenna(:) ⇹mFLT_1D¶Radial distance to the antenna mouth (grid for the electron density […]
Radial distance to the antenna mouth (grid for the electron density profile). 0 at antenna mouth, increasing towards the plasma
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antenna(i1)/n_em^-3structure¶Electron density profile in front of the antenna
Electron density profile in front of the antenna
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antenna(i1)/module(i2)AoS¶Set of antenna modules
Set of antenna modules
Maximum occurrences (MDS+ backend only): 16
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antenna(i1)/module(i2)/power_launchedWstructure¶Power launched from this module into the vacuum vessel
Power launched from this module into the vacuum vessel
antenna(i1)/module(i2)/power_forwardWstructure¶Forward power arriving to the back of the module
Forward power arriving to the back of the module
antenna(i1)/module(i2)/power_reflectedWstructure¶Reflected power
Reflected power
antenna(i1)/module(i2)/reflection_coefficient1structure¶Power reflection coefficient
Power reflection coefficient
antenna(i1)/row(i2)AoS¶Set of horizontal rows of waveguides (corresponding to different […]
Set of horizontal rows of waveguides (corresponding to different poloidal positions). A power spectrum is provided for each row.
Maximum occurrences (MDS+ backend only): 6
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antenna(i1)/row(i2)/positionstructure¶Position of the middle on the row
Position of the middle on the row
antenna(i1)/row(i2)/n_phi(:) ⇹1FLT_1D¶Refraction index in the toroidal direction
Refraction index in the toroidal direction
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Changed in version 4.1.0: Renamed from n_tor
antenna(i1)/row(i2)/n_pol(:) ⇹1FLT_1D¶Refraction index in the poloidal direction. […]
Refraction index in the poloidal direction. The poloidal angle is defined from the reference point; the angle at a point (R,Z) is given by atan((Z-Zref)/(R-Rref)), where Rref=reference_point/r and Zref=reference_point/z
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antenna(i1)/row(i2)/power_density_spectrum_1d(:,:) ⇹WFLT_2D¶1D power density spectrum dP/dn_phi, as a function of time
1D power density spectrum dP/dn_phi, as a function of time
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antenna(i1)/row(i2)/power_density_spectrum_2d(:,:,:) ⇹WFLT_3D¶2D power density spectrum d2P/(dn_tor.dn_pol), as a function […]
2D power density spectrum d2P/(dn_tor.dn_pol), as a function of time
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power_launchedWstructure¶Power launched into the vacuum vessel by the whole LH system […]
Power launched into the vacuum vessel by the whole LH system (sum over antennas)
latency ⇹sFLT_0D¶Upper bound of the delay between input command received from […]
Upper bound of the delay between input command received from the RT network and actuator starting to react. Applies globally to the system described by this IDS unless specific latencies (e.g. channel-specific or antenna-specific) are provided at a deeper level in the IDS structure.
New in version >3.32.1.