rad MHz$^{3}$         degree
  MC with discharge       14.2(5)           58(9)                   $-$18(6)                  69(12)            1.815(8)           $-$3.4(6)                  53(11)            $-$100(2)
  MC without discharge    11.3(4)           42(9)                   $-$4(7)                   54(15)            1.815(9)           $-$5.3(7)                  113(14)           $-$107(2)
  MC, no solenoid            –             31.2(9)                 $-$2.7(3)                  2.6(2)           0.8946(9)          $-$4.45(2)                  12.9(2)           175.6(4)
  ---------------------- --------- ------------------------ ------------------------ ------------------------ ------------ ------------------------- ------------------------- -----------

![ Parameter estimation from variable RCL fits of the data in Figs. 3 and 7 using fit parameters in Table \[tab:2\]. (a) Check of the approximation (\[Iapprox\]). (b) Estimate of resistance using (\[RtI\]) that corresponds to the capacitance of (\[CtI\]) shown in Fig. 9(a). []{data-label="figSI-Analysis3and11"}](FigSI10_McGuyer_MarxCoil){width="8.5cm"}

![ Parameter estimation from the variable RCL fit of the data in Figs. 4 using fit parameters in Table \[tab:2\]. (a) Check of the approximation (\[Vapprox\]). (b) Estimate of resistance using (\[RtV\]) that corresponds to the capacitance of (\[CtV\]) shown in Fig. 9(b). []{data-label="figSI-Analysis25"}](FigSI11_McGuyer_MarxCoil){width="8.5cm"}

Data analysis
-------------

Tables \[tab:1\] and \[tab:2\] list the fixed and variable RLC fit parameters for the fit curves shown in Figs. 3 and 4 of the paper and the additional fit curves in Fig. 7. The additional current data in Fig. 7 corresponds to nearly identical conditions as those in Fig. 3, except that the breakout point was removed to prevent any visible discharge. Fig. 