MDSplus Trees

Tree	Purpose	Key sub-systems	Example signal labels (representative paths)
ACTIVESPEC	Processed active spectroscopy measurements and derived analysis products.	CHERS, FIDA, MPTS	\CHERS_TI → \ACTIVESPEC::TOP.CHERS.ANALYSIS:TI (ion temperature) \CHERS_VT → \ACTIVESPEC::TOP.CHERS.ANALYSIS:VT (toroidal velocity)
ACTIVESP_RAW	Raw active spectroscopy acquisition data used to generate processed products.	MPTS raw cameras, raw CHERS/FIDA	Raw acquisition nodes are often omitted from the signal-label list.
DERIVED	Cross-diagnostic derived quantities computed from multiple primary trees.	Analysis products	Derived signals vary by campaign; typically analysis-level quantities only.
EDGE	Edge and scrape-off-layer diagnostics and processed edge quantities.	Langmuir probes, fast probes, dust	\TLP_P10_CURRENT → \EDGE::TOP.LPARRAY.TLP.P10.CURRENT:VALUES \TLP_P10_VFLOAT → \EDGE::TOP.LPARRAY.TLP.P10.VFLOAT:VALUES
EFIT	General/legacy equilibrium reconstruction products.	EFIT umbrella	See EFIT01–EFIT06 for specific reconstruction variants.
EFIT01	Standard offline EFIT equilibrium reconstruction (primary reference).	AEQDSK / GEQDSK results	\BETAT → \EFIT01::TOP.RESULTS.AEQDSK:BETAT \AMINOR → \EFIT01::TOP.RESULTS.AEQDSK:AMINOR
EFIT02-6	Alternate EFIT reconstruction with different constraints or assumptions.	AEQDSK / GEQDSK results	Same signal concepts as EFIT01; values differ by reconstruction setup.
EFITRT	Real-time equilibrium reconstruction used for operations and control.	Real-time EFIT results	Lower-latency, reduced-fidelity equilibrium quantities.
EFITRT_DEV	Development/testing version of real-time EFIT.	RT-EFIT development	Used for validation and testing of RT-EFIT changes.
ENGINEERING	Machine engineering and plant subsystem measurements.	EPICS, thermocouples, utilities	\TC_EVV_U_1 → \ENGINEERING::TOP.EPICS.TC.TCSIGNALS:EVV_U_1 \TC_IBDH_L_5 → \ENGINEERING::TOP.EPICS.TC.TCSIGNALS:IBDH_L_5
ENG_DEV	Engineering development and testing data.	EPICS (dev)	Development/testing signals; structure parallels ENGINEERING.
FASTMAG	High-sample-rate magnetic diagnostics.	Mirnov coils	High-bandwidth magnetic fluctuation signals.
FUELING	Gas and fueling subsystem signals.	Gas injection systems	Fueling command and measurement signals (label coverage limited).
GASPUFFIMGNG	Gas puff imaging diagnostic data and results.	Imaging, analysis	Imaging-based edge fluctuation diagnostics.
LITHIUM	Lithium injection and conditioning system diagnostics.	Lithium systems	Lithium injector and conditioning signals.
MICROWAVE	Microwave diagnostics and processed analysis products.	FIRETIP interferometer	\DEN_FAST_FIRETIPC4 → \MICROWAVE::TOP.FIRETIP.ANALYSIS:FASTDENSITY4 \NE_C1_INTEG → \MICROWAVE::TOP.FIRETIP.ANALYSIS:NE_C1_INTEG
MICROWAV_RAW	Raw microwave acquisition data.	Microwave raw signals	Raw acquisition nodes are often omitted from the signal-label list.
MMWR	Millimeter-wave radiometry diagnostics.	Radiometry	Signal-label coverage limited for this tree.
NBI	Neutral beam injector subsystem signals.	NB_1A–NB_2C	\NB_1AF_IACCHVE → \NBI::TOP.NB_1A:F_IACCHVE \NB_1AF_VACCHVE → \NBI::TOP.NB_1A:F_VACCHVE
NSTX_VALID	Shot validity, screening, and QA indicators.	Validation flags	Shot-level validity and screening metadata.
OPERATIONS	Shot-cycle, operations, and control-relevant signals.	PCS, magnetics, CHI	\B_L1DMPPPGU1 → \OPERATIONS::TOP.MAGNETICS.MIRNOV.B:BL1DMPPPGU1 \MHD_EVENN_LOWF → \OPERATIONS::TOP.MAGNETICS.MIRNOV:MHD_EVENN_LOWF
OPS_PC	Plasma control system (PCS) interface signals.	PCS	Control-system interface signals and records.
PARTICLES	Particle diagnostics and analysis products.	NPA diagnostics	\NPA_D_TI → \PARTICLES::TOP.NPA.ANALYSIS:D_TI \NPA_FI → \PARTICLES::TOP.NPA.ANALYSIS:ENERGETIC_SP
PASSIVESPEC	Passive spectroscopy and radiation diagnostics (umbrella tree).	D-alpha, EIES, BES, FIDA	\C3_MP → \PASSIVESPEC::TOP:C3 (C III midplane) \EIES_FLEX1 → \PASSIVESPEC::TOP.EIES:FLEX1
PROBES	Probe diagnostic signal collections.	Edge probes	Edge and divertor probe measurements.
PSPEC_PC	Processed passive spectroscopy products.	Calibrated spectroscopy	Processed/calibrated spectroscopy outputs.
PSPEC_RAW	Raw passive spectroscopy acquisition data.	Raw spectroscopy	Raw spectroscopy signals (label coverage limited).
RF	RF heating and current-drive system signals.	HHFW, ECH	\HHFW_POWER → \RF::TOP.HHFW.POWERSIGS:HHFW_POWER \PNET1 → \RF::TOP.HHFW.POWERSIGS:PNET1
SFLIP	SFLIP diagnostic/system signals.	SFLIP	Dedicated SFLIP subsystem signals.
UCLA_INTERF	UCLA interferometer diagnostics.	Interferometry	Line-integrated density interferometer signals.
USXR	Ultra-soft X-ray diagnostics.	X-ray arrays	Soft X-ray emissivity and fluctuation signals.
WF	General waveform collection tree.	Misc. waveforms	Miscellaneous waveform acquisitions.