High power and long pulse capability of the LHCD system of Tore Supra
The lower hybrid system of Tore Supra (LHCD) is mainly devoted to current drive experiments allowing long pulse (greater than 30 s) discharges in the range of 1 - 2 MA and for line-averaged density around 3 x 1.0 E-19/m3. Up to now about 30 plasma shots have been performed with pulse duration larger than 30 s. Application of high power (6 MW) and long pulse (greater than 30 s) operation at a routine incident power density of 20 MW/m2 and constant outgassing in the range of 1 to 2 x 1.0 E-2 mPa.m3/s for 3 MW is outlined. Moreover the weak sensitivity of the reflection coefficient on a wide range of electronic density at the grill mouth allows the two launchers of the LHCD system to operate with a thermal load on the carbon guard limiter below 1% of the total power. The technical options of such long pulse capability are relevant for ITER devices requiring reliable and very long pulse operation (RF less than 20 - 30 MW/m2).
Bibliographic Reference: Paper presented: 17th Symposium on Fusion Technology, Roma (IT), September 14-18, 1992
Availability: Available from (1) as Paper EN 37066 ORA
Record Number: 199211499 / Last updated on: 1994-11-29
Original language: en
Available languages: en