@article{3034939,
    title = "Generation of 1.5 MW-140 GHz Pulses with the Modular Pre-Prototype Gyrotron for W7-X",
    author = "Ioannidis, Z.C. and Avramidis, K.A. and Rzesnicki, T. and Chelis, I. and Gantenbein, G. and Illy, S. and Jin, J. and Pagonakis, I.G. and Thumm, M. and Jelonnek, J.",
    journal = "IEEE Electron Device Letters",
    year = "2021",
    volume = "42",
    number = "6",
    pages = "939-942",
    publisher = "Institute of Electrical and Electronics Engineers, Inc. (IEEE)",
    issn = "0741-3106, 1558-0563",
    doi = "10.1109/LED.2021.3073221",
    keywords = "Cyclotrons;  Electron cyclotron resonance;  Gyrotrons;  Stellarators;  Tokamak devices, Continuous wave gyrotrons;  Electron beam optics;  Electron cyclotron resonance heating;  Experimental campaign;  Experimental verification;  Short pulse;  WENDELSTEIN 7-X, Ultrafast lasers",
    abstract = "In anticipation of an Electron Cyclotron Resonance Heating system upgrade for the stellarator Wendelstein 7-X, a 1.5 MW - 140 GHz continuous-wave gyrotron is under development. In order to provide a first experimental verification of the scientific RF and electron beam optics design of the gyrotron with ms pulses, the Karlsruhe Intitule of Technology has developed a short-pulse pre-prototype gyrotron. In this work, we present details regarding the construction of the pre-prototype as well as measurements from the first experimental campaign delivering up to 1.6 MW in short pulses. © 1980-2012 IEEE."
}