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What’s the most difficult question you’ve been asked as a maintenance instructor?
Blye Widmar
"Where are the prints?!"
This was the final question in an onslaught of verbal feedback, comments, and critiques I received from my students back in 2019. I had two years of instructor experience and was teaching a class that had been meticulously rehearsed in preparation for an accreditation visit. I knew the training material well and transferred that knowledge effectively enough for all the students to pass the class. As we wrapped up, I asked the students how they felt about my first big system-level class, and they did not hold back.
“Why was the exam from memory when we don’t work from memory in the plant?” “Why didn’t we refer to the vendor documents?” “Why didn’t we practice more on the mock-up?” And so on.
E. Westerhof, J. A. Hoekzema, G. M. D. Hogeweij, R. J. E. Jaspers, F. C. Schüller, C. J. Barth, H. Bindslev, W. A. Bongers, A. J. H. Donné, P. Dumortier, A. F. van der Grift, D. Kalupin, H. R. Koslowski, A. Krämer-Flecken, O. G. Kruijt, N. J. Lopes Cardozo, H. J. van der Meiden, A. Merkulov, A. Messiaen, J. W. Oosterbeek, P. R. Prins, J. Scholten, V. S. Udintsev, B. Unterberg, M. Vervier, G. van Wassenhove
Fusion Science and Technology | Volume 47 | Number 2 | February 2005 | Pages 108-118
Technical Paper | TEXTOR: A Flexible Device | doi.org/10.13182/FST05-A692
Articles are hosted by Taylor and Francis Online.
TEXTOR is equipped with two gyrotrons at 110 and 140 GHz, respectively. Both share a single power supply and a confocal quasi-optical transmission line. They cannot be operated simultaneously. The 110-GHz gyrotron with limited power and pulse length (300 kW; 200 ms) has been used in a first series of experiments on electron cyclotron resonance heating (ECRH) and electron cyclotron current drive (ECCD) and for collective Thomson scattering (CTS) diagnostics of energetic ions. In the future the 110-GHz gyrotron will be operated exclusively for CTS diagnostics, while for ECRH and ECCD, the newly installed 140-GHz, high-power (800-kW), long-pulse (>3-s) gyrotron is now available. The highlights of first ECRH experiments with the 110-GHz gyrotron are reported. These include observations of internal transport barriers with ECRH on various target plasmas: in the current plateau phase of both ohmic and radiation improved mode (RI-mode) discharges. In addition, sawtooth control by localized ECRH is demonstrated. First results on CTS include the observation of the slowing down of energetic ions and of the redistribution of energetic ions in sawtooth crashes.
