TY - GEN
T1 - Progress on the ITER ECRH upper launcher steering mirror identification and control
AU - Collazos, A.
AU - Bertizzolo, R.
AU - Chavan, R.
AU - Dolizy, F.
AU - Felici, F.
AU - Henderson, M.
AU - Landis, J.-D.
AU - Sanchez, F.
PY - 2009
Y1 - 2009
N2 - The main objective of the ITER ECRH upper launcher (UL) is to control magnetohydrodynamic activity, in particular neoclassical tearing modes (NTMs), by driving several MW of EC current near the q = 1, 3/2, 2 flux surfaces, where NTMs are expected to occur.
The steering of the EC power is done by the steering mechanism assembly (SMA) that comprises a reflecting mirror and a frictionless and backlash free pneumo-mechanical system actuated with pressurised helium gas. The control requirements for this component in terms of steering accuracy and speed are reviewed. With respect to these requirements, the performance of the first SMA prototype is assessed in a mock up of the UL pneumatic configuration.
The expected design characteristics of the SMA have been verified and an overall satisfactory performance has been assessed. Furthermore, the main challenges for the future work, such as the pressure and angular position control, have been identified.
AB - The main objective of the ITER ECRH upper launcher (UL) is to control magnetohydrodynamic activity, in particular neoclassical tearing modes (NTMs), by driving several MW of EC current near the q = 1, 3/2, 2 flux surfaces, where NTMs are expected to occur.
The steering of the EC power is done by the steering mechanism assembly (SMA) that comprises a reflecting mirror and a frictionless and backlash free pneumo-mechanical system actuated with pressurised helium gas. The control requirements for this component in terms of steering accuracy and speed are reviewed. With respect to these requirements, the performance of the first SMA prototype is assessed in a mock up of the UL pneumatic configuration.
The expected design characteristics of the SMA have been verified and an overall satisfactory performance has been assessed. Furthermore, the main challenges for the future work, such as the pressure and angular position control, have been identified.
U2 - 10.1016/j.fusengdes.2009.02.035
DO - 10.1016/j.fusengdes.2009.02.035
M3 - Conference contribution
T3 - Fusion Engineering and Design
SP - 618
EP - 622
BT - Proceeding of the 25th Symposium on Fusion Technology (SOFT-25), 15-19 September 2008, Rostock, Germany
ER -