About: Timing and triggering of the Thomson scattering diagnostics on the COMPASS tokamak

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Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://dx.doi.org/10.1016/j.fusengdes.2014.03.031
Description	The Thomson scattering diagnostics (TS) at the COMPASS tokamak (operated in the Institute of Plasma Physics ASCR, Prague, Czech Republic) is based on two high-power Nd:YAG lasers, which have a pulse energy of 1.5J and repetition rate of 30 Hz each. 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 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. The Thomson scattering diagnostics (TS) at the COMPASS tokamak (operated in the Institute of Plasma Physics ASCR, Prague, Czech Republic) is based on two high-power Nd:YAG lasers, which have a pulse energy of 1.5J and repetition rate of 30 Hz each. 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 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. (en)
Title	Timing and triggering of the Thomson scattering diagnostics on the COMPASS tokamak Timing and triggering of the Thomson scattering diagnostics on the COMPASS tokamak (en)
skos:prefLabel	Timing and triggering of the Thomson scattering diagnostics on the COMPASS tokamak Timing and triggering of the Thomson scattering diagnostics on the COMPASS tokamak (en)
skos:notation	RIV/00216208:11320/14:10289648!RIV15-MSM-11320___
http://linked.open...avai/riv/aktivita	I P S
http://linked.open...avai/riv/aktivity	I, P(7G10072), P(GAP205/11/2470), P(LM2011021), S
http://linked.open...iv/cisloPeriodika	5
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Janky, Filip
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Karlova v Praze / Matematicko-fyzikální fakulta
http://linked.open...dnocenehoVysledku	50598
http://linked.open...ai/riv/idVysledku	RIV/00216208:11320/14:10289648
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Thomson scattering; Diagnostics control; Real-time control; FPGA; Timing and triggering; Tokamak (en)
http://linked.open.../riv/klicoveSlovo	FPGA Real-time control Diagnostics control Timing and triggering Tokamak Thomson scattering
http://linked.open...odStatuVydavatele	CH - Švýcarská konfederace
http://linked.open...ontrolniKodProRIV	[B3AB78431A00]
http://linked.open...i/riv/nazevZdroje	Fusion Engineering and Design
http://linked.open...in/vavai/riv/obor	BL
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	8 (xsd:int)
http://linked.open...vavai/riv/projekt	COMPASS-RI - Contribution to operation and baseline human resources of the COMPASS tokamak - a large research infrastructure of European impact Joint carrying out by the Contracting Parties of activities within the thematic area %22fusion energy research%22 of the Seventh Community (Euratom) Framework Program Control of ELM size and frequency using externally imposed changes of the plasma position in the COMPASS tokamak
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	89
http://linked.open...iv/tvurceVysledku	Hron, M. Janky, Filip Panek, R. Naylor, G. Bohm, P. Bilkova, P. Mikulin, O. Salasek, J.
http://linked.open...ain/vavai/riv/wos	000339133600039
issn	0920-3796
number of pages	5 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.fusengdes.2014.03.031
http://localhost/t...ganizacniJednotka	11320

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