0433042 - ÚFP 2015 RIV CH eng J - Journal Article
Mikulín, Ondřej - Hron, Martin - Böhm, Petr - Naylor, G. - Bílková, Petra - Janky, Filip - Salášek, J. - Pánek, Radomír
Timing and triggering of the Thomson scattering diagnostics on the COMPASS tokamak.
Fusion Engineering and Design. Roč. 89, č. 5 (2014), s. 693-697. ISSN 0920-3796. E-ISSN 1873-7196.
[The 9th Technical Meeting on Control, Data Acquisition, and Remote Participation for Fusion Research/9./. Hefei, 06.05.2013-10.05.2013]
R&D Projects: GA MŠMT 7G10072; GA MŠMT(CZ) LM2011021; GA ČR GAP205/11/2470
Institutional support: RVO:61389021
Keywords : Tokamak * Timing and triggering * FPGA * Real-time control * Diagnostics control * Thomson scattering
Subject RIV: BL - Plasma and Gas Discharge Physics
Impact factor: 1.152, year: 2014 ; AIS: 0.358, rok: 2014
Result website:
http://www.sciencedirect.com/science/article/pii/S0920379614002105#DOI: https://doi.org/10.1016/j.fusengdes.2014.03.031

A new timing and synchronization unit (TSU) based on a Field Programmable Gate Array (FPGA) was designed and constructed in order to assure reliable and synchronized control of flash lamps and Q-switches of both Thomson scattering diagnostics (TS) lasers. Correct delay between laser pulses is necessary to obtain the highest possible laser energy and to prevent the active medium, the Nd:YAG rod, from thermal damage.An FPGA development kit was chosen as core hardware for the TSU and dedicated input and output circuits were manufactured to adapt the kit interfaces for COMPASS TS needs. In addition, the FPGA firmware, the control software, and the graphical user interface were developed to control the TSU hardware. This paper describes the TS regimes that are addressed by the new TSU. Further, the TSU design, the operation flow, and the firmware and software development are presented. Finally, the results of commissioning are shown.
Permanent Link: http://hdl.handle.net/11104/0237356