Predicting the threshold for onset of internal electric breakdown in helical flux compression generators using CAGEN and CALE

Chase, Jay B.; Kiuttu, G.F.; Peterson, Giles; Chato, D.M.

doi:10.1109/megagauss.2012.6781419

Cited by 4 publications

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To register the BSBIF calculation model, shots 15, 16 and 17 [2] were computed and compared with both the CAGEN model of each and with the experiments. These were all done with the 128 angles per turn resolution.…”

Section: The Codementioning

confidence: 99%

See 1 more Smart Citation

Biot-Savart for bifurcation, BSBIF

Chase¹,

Peterson²

2012

2012 14th International Conference on Megagauss Magnetic Field Generation and Related Topics (MEGAGAUSS)

Self Cite

View full text Add to dashboard Cite

To this date, most (perhaps all) computer simulations and models (including Care'n Co.'s code CAGEN [1]) that are capable of being used to predict the behavior of helical flux compression generators (HFCG) approximate both the helicity of the windings and the bifurcations. The spiral nature of the windings is approximated with loops that lie in a plane perpendicular to the axis of the HFCG. Perhaps the most notable approximation is the assumption that the currents in each of the bifurcate legs are equal. There have been a few experiments that have measured the currents in each "parallel" winding separately, and those measurements have shown that the currents are not equal (none of these experiments have been published). The concern, then, is that the electrical fields within the HFCG will not be represented accurately by those approximations. To examine these short falls, The Care'n LLC has developed a HFCG modeling code that treats the windings in their actual spiral and bifurcated form and, further, allows the currents in each wire to be computed self consistently. This code is called (for the time being) BSBIF standing for Biot-Savart BIFurcation. The details of BSBIF, its implementation, running speeds, and comparisons to CAGEN are presented. No bifurcation issues regarding internal electrical breakdown have been found.

show abstract

Section: The Codementioning

confidence: 99%

“…The objective of this project is to develop a model that accurately predicts moment and place of the internal electrical breakdown threshold within a highly efficient HFCG [2]. The concern is that the electrical fields within the HFCG will not be represented accurately by approximations to the actual bifurcation geometry.…”

Section: Introductionmentioning

confidence: 99%

Biot-Savart for bifurcation, BSBIF

Chase¹,

Peterson²

2012

2012 14th International Conference on Megagauss Magnetic Field Generation and Related Topics (MEGAGAUSS)

Self Cite

View full text Add to dashboard Cite

show abstract

The precision fabrication of non-split-turn, bare wire, constant pitch high explosive flux compression generators for use in internal electric breakdown experiments

Kuklo¹,

Ault²,

Chase³

2012

2012 14th International Conference on Megagauss Magnetic Field Generation and Related Topics (MEGAGAUSS)

View full text Add to dashboard Cite

Experiments with explosive flux compression Generators Confirming the CAGEN-CALE threshold predictions for internal electric breakdown

Ault¹,

Kuklo²,

Chase³

2012

2012 14th International Conference on Megagauss Magnetic Field Generation and Related Topics (MEGAGAUSS)

Self Cite

View full text Add to dashboard Cite

A total of seven shots were fired at the HyperSpectral Sciences, Inc. firing site in Cinebar, WA, in support of the program to elucidate the internal electric breakdown phenomena. Three experiments were full-up HFCG shots. All of the HFCG shots broke down, while the last one exhibited the clearest example of "classical" breakdown. The correlation of the computer model threshold calculation with the last shot is quite good. The use of framing and streak cameras as a diagnostic has proved viable; the contact point as well as the breakdown are very visible. It was found that the electrical arcs that result from the breakdowns do not move. They are overrun by the contact point. The compressed gas in the interior of the HFCG must be taken into account. While it seems quite evident that the breaks are from the stator to the armature, our evidence cannot prove the point. Details of the firing arrangements, the data recovery methods, and the results with comparisons to theory [1], [2], and [3] are presented.

show abstract

Predicting the threshold for onset of internal electric breakdown in helical flux compression generators using CAGEN and CALE

Cited by 4 publications

References 5 publications

Biot-Savart for bifurcation, BSBIF

Biot-Savart for bifurcation, BSBIF

The precision fabrication of non-split-turn, bare wire, constant pitch high explosive flux compression generators for use in internal electric breakdown experiments

Experiments with explosive flux compression Generators Confirming the CAGEN-CALE threshold predictions for internal electric breakdown

Contact Info

Product

Resources

About