Array ( [_escl_groups] => Array (  => ) [_edit_last] => Array (  => 4 ) [_edit_lock] => Array (  => 1388739012:4 ) [efda_color] => Array (  => #4EA9F4 ) )
Posted September 1st 2005
Core Charge Exchange Recombination Spectroscopy
A new periscope, faster CCD cameras and two new spectrometers will increase the availability of ion temperature profile, toroidal rotation velocity and impurity density measurements and improve signal to noise ratio.
Mark II HD (High Delta) Divertor
New tilted tiles will accommodate high power plasma discharges with ITER-like triangularity.
Replacement of the vertical and horizontal bolometer cameras, measuring total radiation losses with enhanced resolution in the divertor region.
New fast electronics for data acquisition at high sampling frequency.
Disruption Mitigation Valve
New valve for gas injecting experiments in order to mitigate plasma energy during disruptions.
Rogowski coils and magnetic pick-up probes to measure the “halo currents” flowing through plasma and the vessel during vertical displacements (disruptions).
Wide angle system for infrared observation of divertor, ICRH antenna, and inner wall, to establish the power load distribution at the first wall.
ICRH Transmission Lines and Main Port Bellows
New transmission lines, 3dB couplers and main port bellows for the ELM resilient, ITER-like ICRH antenna (under construction).
High Resolution Thomson Scattering
“Classical” Thomson Scattering with high resolution of electron temperature and density at the edge and at the Internal Transport Barrier. With up to 15mm space resolution and 20 Hz time resolution it will complement the JET’s LIDAR system.
Replacement of lossy waveguides by low-loss microwave transmission with 6 new antennas, will allow broadband reflectometry for density fluctuation measurement as well as for Michelson ECE electron temperature measurement (oblique).
Enhanced system of external and internal coil sensors for improved magnetic reconstruction accuracy.
Improved Neutral Beam Neutraliser and new power supplies
Further increase of the power on Octant 8 NBI (~2 MW in D0) by improving the neutralisation efficiency by ~25%.
Toroidal Alfven Eigenmode Antennas
Two groups of four active and passive antennas to determine stability characteristics of fast Alfven modes (one installed this shutdown).
Time Of Flight for Optimised Rate (TOFOR)
High sensitivity spectrometer for DD (2.5 MeV) neutrons, giving spectra at higher frequency.
Magnetic Proton Recoil Upgrade
The neutron spectrometer will extend its range from 14 MeV DT energies down to 2.5 MeV DD energies.
Lost Alpha Particle Diagnostics
Faraday collectors to determine poloidal profile of fast ion loss (left) Scintillator probe for measurements of energy and pitch angles of lost alphas and fast particles (from fusion reactions and heating tails) (right).
Extreme Shape Controller
Extends the plasma stability towards extremely shaped plasmas - even in the presence of edge localised modes (ELMs) – by better exploitation of all the existing active circuits and control hardware.
Tritium Retention Studies
A set of detectors (new quartz micro-balances, rotating collectors, deposition monitors, smart tiles and mirror test units) to address the problems of Tritium retention and erosion/deposition processes
Existing set of techniques (thermocouples, pick up coils etc.) that needed refurbishment due to damage and/or new divertor shape will contribute to plasma characterisation in the divertor region.
Edge Charge Exchange Recombination Spectroscopy
Will provide high resolution radial profiles of ion temperature, plasma rotation velocity and impurity ion density at the plasma edge.
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