Procyon Experiments Utilizing Explosively-formed Fuse Opening Switches

Abstract

This report was prepurcd tvsan account of work qsonaorcdby an agency of the [Jnilad Statm Ckwcrnmcnt Neither the [Jnited Sta(es Government nor any agency thereof, nor any of their cmpluyces, mukcs any wnrranty, express or implied, or asmumcsany Icgal liability or rcsportsi. bdity for Ihc uccuracy, cwr,pletwtcas, or uscfulncsnof any mformution, apparatus, product, or processdiscloacd, or rcprcscnls that IIS U.SCwould not mfrinpc privately owned rights. Rcfercncc hcrcm to any spccIfIc commercial product, prucws, or scrwcc hy trudc m+mc, \radcmark, mrnrvufacturcr,or othcrwtsc doe? not nwcssnnly cwts!ltutc or imply IIS c.ndorsemcnt, rccommcndatwrt, or (nvormg hy the (Initcd Stoics (hwcrnmcnt or tiny agctwy Ihcrcuf. The views and opmionn of authors cxprcaacd hcrctn do not nccsxardy state or reflect thuae of the Uni@d Stntca Government or qny agency thcrcd

Advances in Isentropic Compression Experiments (ICE) Using High Explosive Pulsed Power

“…First, we identified closing switch problems. The closing time of the Procyon-style switches [6] was strongly dependent on current, and the impedances of the switches were too large when they closed. Second, in an effort to correct the switch problem we inadvertently introduced a new breakdown problem in the Kapton insulation.…”

Isentropic compression of metals, at multi-megabar pressures, using high explosive pulsed power

“…From the cumulative data of 20 tests we found that the "Procyon-style" closing switches [9] had a standard deviation (a) from the mean delay of 39 ns at 13 kV. However, a increased with applied voltage across the switch, reaching 96 ns at 140 kV, the voltage at which the first switches were required to close in HEPP-ICE.…”

Isentropic compression of metals, at multi-megabar pressures, using high explosive pulsed power

“…Timing of the closing switches is critical for achieving the correct current profile. From the cumulative data of 20 tests we found that the "Procyon-style" closing switches [9] had a standard deviation (a) from the mean delay of 39 ns at 13 kV. However, a increased with applied voltage across the switch, reaching 96 ns at 140 kV, the voltage at which the first switches were required to close in HEPP-ICE.…”