adding optimal inputs file for streamer verification

test/verification/Streamer_Axisym/inputs2d_amr_opt

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+max_step  = 20000000
+stop_time = 1.6e-8
+
+# PROBLEM SIZE & GEOMETRY
+geometry.is_periodic =  0  0  1
+geometry.coord_sys   =  1       # 0 => cart, 1 => RZ (axisymmetric)
+geometry.prob_lo     =  0.0     0.0     0.0 
+geometry.prob_hi     =  0.0125   0.0125 3.90625e-4
+amr.n_cell           =   256 256 4
+
+# VERBOSITY
+amr.v              = 1       # verbosity in Amr
+
+# RESTART
+# amr.restart = chk00020
+
+# REFINEMENT
+amr.max_level       = 4       # maximum level number allowed
+amr.blocking_factor = 128       # block factor in grid generation
+amr.max_grid_size   = 2048
+
+amr.regrid_int      = 5       # how often to regrid
+
+# TIME STEP CONTROL
+vidyut.dt             = 1e-12
+vidyut.num_timestep_correctors = 2
+vidyut.hyp_order = 5
+
+# Voltage settings
+vidyut.voltage_amp_lo=0.0 0.0 0.0
+vidyut.voltage_amp_hi=0.0 18.75e3 0.0
+
+vidyut.user_defined_potential = 1
+vidyut.user_defined_species = 1
+vidyut.user_defined_vel = 1
+
+# Tagging
+#vidyut.tagged_vars = Potential ReducedEF
+vidyut.tagged_vars = Potential ReducedEF E
+vidyut.Potential_refine = 1e20
+vidyut.Potential_refinegrad = 400.0
+vidyut.ReducedEF_refine = 1000.0
+vidyut.ReducedEF_refinegrad = 5.0
+vidyut.E_refine = 5e19
+vidyut.E_refinegrad = 5e17
+
+#0 - periodic
+#1 - Dirichlet
+#2 - Homogenous Neumann
+#3 - Inhomogenous Neumann
+#4 - Robin
+
+vidyut.pot_bc_lo = 2 1 0
+vidyut.pot_bc_hi = 2 1 0
+
+vidyut.eden_bc_lo = 2 2 0
+vidyut.eden_bc_hi = 2 2 0 
+
+vidyut.eenrg_bc_lo = 2 2 0
+vidyut.eenrg_bc_hi = 2 2 0
+
+vidyut.ion_bc_lo = 2 2 0
+vidyut.ion_bc_hi = 2 2 0
+
+vidyut.neutral_bc_lo = 2 2 0
+vidyut.neutral_bc_hi = 2 2 0
+
+# PLOTFILES
+amr.plot_file  = plt    # root name of plot file
+amr.plot_int   = 1000     # number of timesteps between plot files
+
+# CHECKPOINT
+amr.chk_file = chk      # root name of checkpoint file
+amr.chk_int  = 1000      # number of timesteps between checkpoint files
+
+vidyut.bound_specden=1
+vidyut.min_species_density=1e0
+vidyut.linsolve_maxiter=1000
+vidyut.bg_species_ids=1
+
+prob.loc_x=0.0
+prob.loc_y=1.0e-2
+prob.loc_z=1.5625e-3
+prob.rad=0.4e-3
+prob.ampl=5e18
+prob.bg=1e13
+prob.twod=1
+prob.nscale=1.0
+prob.potscale=1.0