SNL Brick Model
!
! Rick Spielman 2016-05-13
!
Time-step 1e-12
Resolution-time 1e-9
End-time 1.5e-6
Number-prints 5
Execute-cycles all
Grids no
Echo-setup no
Max-points 20001
!
!Start circuit definition
!
! We start with a capacitor and switch with the parameters based on the
! Thor II brick with the 80 nF version of the GA 35426M Capacitor 40 nF,
! 15 nH, start with a 0.13  ESR. We will use a total inductance of 121.5 nH for the brick
! that includes the inductance of the feeds leading to the load and the
! inductance of the load.
! 
! At this point we really do not know the time dependent ESR of the capacitor.
!
! We will use the Martin Switch model for the Kinetech Switch
!
! The charge voltage will be 100 kV. This is the operating point for the SNL test brick.
!
!
BRANCH
!
! Capacitor capacitance and charge voltage
!
RCGround 1e+12 40e-9
Initial VC1 200e3
UFO VC1
$V_brick
UFO EC1
$E_brick
! Cap inductance, case & parasitic inductance, and ESR
!
RLSeries 0.24 50e-9
UFO ER2
$E_ESR
!
! Switch resistance - Martin Model and switch inductance - measured
! 0.375 gap and 242 psia air
!
! Initial switch resistance was chosen to be higher than that printed in the first
! few time steps so as to appear monotonically decreasing in R plots
! A careful few runs sowed that 10 G looked best. In any event by 1 ns all of the 
! resistance values are the same.
!
RLSeries 10e9 35e-9
Var R2 Switch
!dielectric switchtime gap      pressure     nswitch nchannels
AIR         0.0        0.009525 16.46        1       1
UFO R2
$R_switch
UFO ER2
$E_switch
!
! Output TL header inducatance
!
RLSeries 0.00 36.5e-9
!
! Load resistance = Rmatched
!
RCGround 2.0 0.0
UFO IR1
$I_brick
UFO QR1
$Q_brick
UFO VR1
$V_out
UFO PR1
$P_out
UFO ER1
$E_out
!
! End circuit
!