Modeling and analysis of breakdown EMI protection for MITICA insulation and embedded diagnostics

Pesce, A.; Pomaro, N.; Zamengo, A.; Bigi, M.; Toigo, V.

doi:10.1016/j.fusengdes.2013.01.060

Cited by 5 publications

(3 citation statements)

References 4 publications

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“…Similar analyses have already been done for the full Megavolt Neutral Beam Injector called MITICA [2] (Megavolt ITER Injector and Concept Advancement) and are described in [5]. Being SPIDER assembled before MITICA, it could be a proper facility to develop solutions that can be eventually transferred to MITICA.…”

mentioning

confidence: 85%

“…Ho arc voltage drop negligible if compared to voltages it has a minor effect on the overvolt propagation upstream the grid themselves. proven and is described in [5], where different tested. Hence, for homogeneity with past relea This has been t arc models were ases the reference model consists on a simplified versio an inductance and a small resistance…”

Section: E Arc Modelmentioning

confidence: 99%

“…The only viable solution is the r overvoltages or by circuital modifications installation of suppressing devices. For s reasons described in [5] the capacitors instal preferred rather than other suppression devic local capacitors, installed between points voltage transients were observed, has been eva of some analyses.…”

Section: Source and Bushing Protectionmentioning

confidence: 99%

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Study of protection strategies against breakdown effects in the SPIDER experiment

Pesce

Zamengo

Bigi

et al. 2013

2013 IEEE 25th Symposium on Fusion Engineering (SOFE)

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PlasmaGridFilter PS Bias PS Feedthroughs HV deck Junction section Vacuum connectors Connection box V V V V V V V V VBias VPGL VPGR VEG VPG-SO VPG-EG ΔVcable-screen Vscreen Extraction Grid PS Bias Plate PS V VBP-PG VBP V RF PS TL screens Vessel Acceleration Grid PS 0,5 µF 1 µF Damping Resistor Ion Source PSFig. 1. Layout of source electrical connections showing the locations of data acquistion and capacitors installation. Abstract-The prototype of the ITER HNB Ion Source will be tested in the facility called SPIDER (Source for the Production of Ions of Deuterium Extracted from RadioFrequency plasma), under construction at Consorzio RFX site in Padua, Italy. During the operation, several breakdowns are expected to occur across the -96 kV Accelerator gap, causing transient overvoltages between parts normally at low voltage and large overcurrents flowing from the Power Supplies to the source. The paper firstly describes the development of the fast transient electrical model of the overall SPIDER electric system and then the results of the analyses performed with the reference design configuration, showing severe overvoltages in particular on the Ion Source and on the HV Bushing feedthroughs. The installation of some countermeasures, as local capacitors or a damping resistor was finally simulated, showing an effective limitation of these electrical stresses.

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mentioning

confidence: 85%

Section: E Arc Modelmentioning

confidence: 99%