Update several parameters, element kinds

source/parameters/beambeam.md

@@ -1,5 +1,18 @@
 (s:beambeam.params)=
-## BeamBeamP: Beambeam Parameters
+## BeamBeamP: BeamBeam Parameters
 
-In Construction...
+The `BeamBeamP` parameter group describes a particle beam element
+from the opposite moving colliding beam. 
+
+The inputs of `BeamBeamP` are:
+```{code} yaml
+BeamBeamP:
+  sigx      # The horizontal beam size of the opposite beam (default: 0 m).
+  sigy      # The vertical beam size of the opposite beam (default: 0 m).
+  xdisp     # The horizontal displacement of the opposite beam (default: 0 m).
+  ydisp     # The vertical displacement of the opposite beam (default: 0 m).
+  charge    # The charge of the opposite beam (default: 1 for proton).
+  energy    # The total energy in eV of the opposite beam.
+  Npart     # Number of charged particles of the opposite beam.
+```
 

source/parameters/initialparticle.md

@@ -2,5 +2,26 @@
 (s:init.particle.params)=
 ## InitialParticleP: Initial Particle Coordinates Parameters
 
-In Construction...
+The `InitialParticleP` parameter group contains parameters for describing the 
+initial beam particle distribution.
+The components of this group are:
+```{code} yaml
+InitialParticleP:
+  Distype: ""    # [string] name of initial distribution type
+  sigx           # RMS x = sqrt(<x^2>)
+  sigpx          # RMS px = sqrt(<px^2>)
+  muxpx          # <xpx>
+  xoff           # <x>
+  pxoff          # <px>
+  sigy           # RMS y = sqrt(<y^2>)
+  sigpy          # RMS py = sqrt(<py^2>)
+  yoff           # <y>
+  pyoff          # <py>
+  muypy          # <ypy>
+  sigz           # RMS z = sqrt(<z^2>)
+  sigpz          # RMS pz = sqrt(<pz^2>)
+  muzpz          # <zpz>
+  zoff           # <z>
+  pzoff          # <pz>
+```
 

source/parameters/tracking.md

@@ -5,5 +5,15 @@
 Tracking parameters are highly program specific but it is useful to have a group
 having some standardization.
 
+The `TrackingP` parameter group contains parameters for describing the particle
+tracking.
+The components of this group are:
+```{code} yaml
+ReferenceP:
+  tracking_type: "" # [string] type of tracking
+  start_loc: ""     # [string] Where tracking starts
+  end_loc: ""       # [string] Where tracking ends
+  ...
+```
 In Construction...