Speaker
Jeremie Dubray
(Ecole Polytechnique Fédérale de Lausanne)
Description
The Swiss Plasma Center (SPC) is involved in the development and the operation of gyrotrons for fusion application (TCV tokamak, W7-X, ITER) and for medical application as well (spectroscopy DNP/NMR). In this framework, embedded control systems based on National Instrument (NI) compact Reconfigurable Input Output (cRIO) and compact Data AcQuisition (cDAQ) offer versatile solutions for dedicated applications. Three specific developments are presented and discussed here.
First, a complete control system based on cDAQ material has been implemented in a Modulator Power Supply (MPS) controlling the anode to cathode voltage of a triode type gyrotron [1]. This system placed at the cathode potential (84 kV) provide the MPS output voltage control, the system protections, an embedded data acquisition and the interface for the remote operation. The dynamic drive of the output voltage is made possible thanks to the FPGA integrated onto the cRIO chassis.
Second, we developed a compact system to characterize the RF losses on the various gyrotron components. Based on a cDAQ solution, this system allows for real time calorimetric measurements on the water cooling circuits.
Third, we developed a whole control system for a DNP/NMR gyrotron [2]. Dynamic Nuclear Polarization (DNP) has emerged as a powerful technique to obtain signal-to-noise enhancements of a few orders of magnitude in nuclear magnetic resonance (NMR) spectra.
The flexibility given by these compact control systems and acquisition could offer multiple solutions in many applications for fusion research.
[1] U. Siravo et al., Fusion Engineering And Design, vol. 96-97, October 2015, p. 597-601
[2] S. Alberti et al., Phys. Plasmas 19, 123102 (2012); doi: 10.1063/1.4769033
Co-authors
Alberto Perez
(Ecole Polytechnique Fédérale de Lausanne, Swiss Plasma Center, CH-1015, Lausanne, Switzerland)
Damien Fasel
(Ecole Polytechnique Fédérale de Lausanne, Swiss Plasma Center, CH-1015, Lausanne, Switzerland)
Jean-Philippe Hogge
(Ecole Polytechnique Fédérale de Lausanne, Swiss Plasma Center, CH-1015, Lausanne, Switzerland)
Jeremie Dubray
(Ecole Polytechnique Fédérale de Lausanne, Swiss Plasma Center, CH-1015, Lausanne, Switzerland)
Miguel Silva
(Ecole Polytechnique Fédérale de Lausanne, Swiss Plasma Center, CH-1015, Lausanne, Switzerland)
Philippe Cuanillon
(Ecole Polytechnique Fédérale de Lausanne, Institute of Condensed Matter Physics, CH-1015, Lausanne, Switzerland)
Stefano Alberti
(Ecole Polytechnique Fédérale de Lausanne, Swiss Plasma Center, CH-1015, Lausanne, Switzerland)
Steve Couturier
(Ecole Polytechnique Fédérale de Lausanne, Swiss Plasma Center, CH-1015, Lausanne, Switzerland)
Ugo Siravo
(Ecole Polytechnique Fédérale de Lausanne, Swiss Plasma Center, CH-1015, Lausanne, Switzerland)
