The 140 GHz, 10 MW, CW ECRH system for W7-X: a training field for ITER

Both, the W7-X stellarator, which is under construction at IPP-Greifswald, and the ITER Tokamak, which is built at Cadarache, France, is equipped with a strong ECR-heating and current drive system. Both systems are similar in frequency and have CW-capability (140 GHz, 10 MW, CW for W7-X and 170 GHz, 24 MW, 1000 s for ITER). The commissioning of the ECRH plant for W7-X is well under way, the status of the project and first integrated full power, CW test results from one module are reported. As the technological demands for ECRH have many similarities in both, the W7-X and ITER devices, results and experience from the W7-X ECRH may provide valuable input for the ITER plant. The installation at W7-X was already used successfully as a test bed for ITER ECRH components under high power conditions.