| Thomson Scattering |
I. Pastor |
Operational |
1 shot per discharge, medium-to-high spatial resolution Te and ne profiles along plasma chord.
Best in NBI phase (due to increased density). Not very reliable @ densities below ≈ 0.5 × 1019 m-3.
As of 30/10/2023 both ICCD cameras are in operation. Please request TS measurements whenever necessary, but only if necessary.
|
| Microwave Interferometer |
T. Estrada |
Operational |
Time trace of the central line-integrated electron density. Less reliable for high densities (above 3–4e19 m-3)
due to spurious phase jumps. Fundamental for machine operation.
|
| Mirnov coil arrays |
A. Cappa
P. Pons |
Operational |
Four sets of magnetic coils digitised at 1 Ms/s:
- 2 “vertical” arrays located at sectors B5 and C4 (four triaxial coils each)
- A poloidal array at sector D5 (less than 15 coils remain useful)
- 2 helical arrays covering sector D (32 triaxial coils each)
|
| Diamagnetic loop |
A. Cappa
F. Lapayese
A. Pereira |
Operational |
Time trace roughly proportional to plasma energy content. Strongly perturbed by plasma current.
Correction acceptable for small currents (|Ip| ≤ 1 kA), not for high plasma currents.
|
| Rogowski coil |
A. Cappa
F. Lapayese
A. Pereira |
Operational |
Time trace proportional to the plasma current. |
| AM Reflectometer |
T. Estrada |
Operational |
Edge density profiles with temporal resolution of 2 ms.
Reconstructed profiles often have large uncertainties; raw data commonly used in Bayesian approaches
(with interferometry and Thomson scattering) to reconstruct density profiles.
|
| Doppler Reflectometer |
T. Estrada |
Operational |
Density turbulence and perpendicular rotation velocity (E×B velocity) with good temporal, spatial and spectral resolution.
Radial range ~ ρ = 0.5–0.9; k⊥ selectable between 3 and 15 cm-1.
|
| ECE |
T. Estrada |
Operational |
Electron temperature profiles using a 12-channel heterodyne radiometer (50–60 GHz),
corresponding to second harmonic ECE in X-mode at B = 0.95 T on-axis.
Most channels receive radiation from the HFS.
|
| Heavy Ion Beam Probe |
J. L. de Pablos |
Operational |
Two HIBP systems measuring plasma electrostatic potential and electron density (HIBP1 and HIBP2a;
2 and 5 simultaneous sample volumes respectively, poloidally separated).
Signal bandwidth: 1 MHz (density), 250 kHz (potential). Full in-out radial scan.
Beam attenuation tolerable until 2e19 m-3 line-averaged density.
|
| H pellet and TESPEL injection |
K. J. McCarthy |
Operational |
4 pellets or 3 pellets & TESPEL per discharge. |
| Langmuir probes |
M. Ochando
I. Voldiner |
Operational |
Two systems of reciprocating multi-pin LP provide radial profiles of Vf, Isat, Te, Er, Ep and their fluctuations
in the plasma periphery.
|
| Charge exchange spectroscopy |
J. Hernández
K. McCarthy |
Non operational |
Vi, Ti and Er from ρ = 0 to 0.7 once per discharge. |
| Bolometry |
F. Medina |
Operational |
Three 20-channel arrays for tomographic reconstruction of plasma emissivity (2 eV to 5 keV)
plus three 16-channel arrays to detect toroidal asymmetries of global plasma radiation.
|
| Motional Stark Effect |
K. J. McCarthy
J. Hernández |
Non operational |
Bz & Bphi & pitch, from ρ = 0 to 0.7, once per discharge. |
| Soft X-rays Tomography |
F. Medina |
Operational |
Four 16-channel arrays for tomographic reconstruction of soft X-ray (SXR) emissions (0.7–5 keV).
Fifth camera (thinner Al/C filter) at same toroidal position monitors fast events up to 1 MHz.
|
| SXR Multifilter diagnostic |
F. Medina |
Operational |
Two twin sets of four SXR detectors, each with a different Be filter, to obtain coarse spectral information.
Te and Zeff can be estimated for NBI plasmas.
|
| SXR Spectroscopy |
F. Medina |
Non operational |
Being upgraded / not operative. PHA technique with Silicon Drift detector.
Several collimators and Be filters. System can be tilted vertically for radial scans shot-to-shot.
|
| Supersonic He beam |
D. Tafalla |
Operational |
ne & Te profiles from ρ = 1.0 to 0.8. Number of profiles is limited.
|
| Fast cameras |
E. de la Cal
N. Panadero |
Operational |
APX-RS in sector B2 (pellet injector): single or double bundle for TOP, SIDE and/or TANG view,
or in sector A1 (LBO): single bundle for TOP view.
Speed: 3 kpfs @ 1024×1024, 10 kfps @ 512×512, 250 kfs @ 128×16.
Min. exposure time: 1 μs.
|
| Fast Ion Loss detector |
B. López-Miranda
A. Baciero
D. Jiménez Rey |
Operational |
Energy (Ti) and pitch angle of fast ion loss from plasma edge under NBI co-injection (and ECRH).
PMT (sampling up to MHz) for integrated light trend and CCD fast camera for phase-space study.
Typical integration time 5–10 ms up to 200 ms.
|
| Scanner system |
B. López-Miranda
A. Baciero |
Operational |
Selects a wavelength with a 1/2 m spectrometer and rotating mirror to obtain spatial profile for Zeff.
Mirror can be bypassed with optical fibre to measure at central chord (A1).
|
| CCD + 1/2 m spectrometer |
B. López-Miranda
A. Baciero |
Operational |
1/2 m spectrometer to measure one spectrum in selected wavelength with the CCD (A1).
|
| PMA12 |
B. López-Miranda
A. Baciero |
Operational |
Low spectral resolution but wide spectral band (200 to 900 nm) every 20 ms (A1).
|
| Laser Blow-Off & LIBS |
B. López-Miranda
A. Baciero |
Operational |
Nd:YAG IR laser (1064 nm, up to 800 mJ, 10 Hz) used for blow-off experiments (e.g., Fe injection)
and LIBS studies (LiLA-TOF) (A1).
|
| CV monitor |
B. López-Miranda
A. Baciero |
Operational |
With a monochromator, the 227.1 nm wavelength (CV) is selected and measured with a photomultiplier (B5).
|
| CCD + 1 m spectrometer |
B. López-Miranda
A. Baciero |
Operational |
Measures selected wavelength with spatial resolution. Usually measures Halpha, CV or CIII (B5).
|
| D1461 |
B. López-Miranda
A. Baciero |
Operational |
Linear array + high resolution spectrometer to measure Halpha/Dalpha spectrum, typically every 15 ms (B5).
|
| Neutral Particle Analyzers |
J. Hernández
A. Ros
J. M. Fontdecaba |
Operational |
Ti along 2 radial lines-of-sight with 1 ms resolution.
Usually scans neutrals in the 200–1200 eV range (12 energy channels per LOS) for Ti calculation.
Can change energy range up to 20 keV. LOS can be changed from centre to edge.
|
| Spectroscopic Gas Puff Imaging |
E. de la Cal
I. Voldiner |
Operational |
2D imaging of edge plasma ne and Te. Helium injection is mandatory.
|
| Compact Neutral Particle Analyzers |
J. Hernández |
Non operational |
Tangential line-of-sight. Scans 1–40 keV neutrals in 16 energy channels from NBI #1.
|
