Here is the first draft of stuff that I worked up for adding APAWs (Antimatter Particle Accelerator Weapons) to FF&S or FF&S2.  I haven't play tested this yet, but since I may not get around to it any time soon I going to just go ahead and set it loose.


APAWs are built as normal PAWs with the following additions.
1. Select the velocity that the weapon will fire at, or the lowest firing velocity for variable velocity APAWs.  This determines the maximum amount of antimatter that can be fire by the weapon.  (Variable velocity APAWs can be fired at velocities lower than what they are designed for but this will only reduce the range)
2. Determine the total Annihilation Energy (AE) by multiplying the APAWs Discharge Energy (DE) by the AE MJ/DE MJ value for the selected firing velocity on the APAW table.
3. Using the AE, calculate the Volume, Mass and Cost of the Antimatter Handling Equipment as shown on the Antimatter Handling Equipment table.  If these amounts are less than the minimum amounts use the minimum amounts instead.
4. Determine the APAWs Effective Range by modifying the normally determined effective range by the Range Mod.  Determine the APAWs damage by multiplying the normally determined damage by the DV Mod.

APAW table
          DV   Range  AE MJ/
Velocity  Mod  Mod    DE MJ
0.9c      1.3  0.9      1.5
0.8c      1.6  0.8      3.0
0.7c      1.9  0.7      5.0
0.6c      2.2  0.6      8.0
0.5c      2.7  0.5     12.9
0.4c      3.5  0.4     22.0
0.3c      4.7  0.3     41.4
0.2c      7.0  0.2     97.0
0.1c     14.1  0.1    397.0


Antimatter Handling Equipment table
                           Minimum Minimum Minimum
TL  Volume  Mass   Cost    Volume  Mass    Cost
17  0.005   0.03   0.0025    2      12.0    1.0
18  0.0025  0.0125 0.00125   0.25     1.25  0.125
19  0.001   0.004  0.0005    0.0625   0.25  0.03125
20  0.0005  0.0015 0.00025   0.025    0.075 0.125 
21  0.00025 0.0005 0.000125  0.004    0.008 0.002
Values are per 1MJ of AE

For Variable Velocity APAWs: 1.2x cost of Tunnel

Notes:
Discharge Energy in APAWs is the Kinetic Energy (KE) of the particles accelerated.  Using this you can then determine the maximum mass that an APAW can accelerate for a given velocity using the equation m=(KE)/(c^2*(1/(SQRT(1-(v^2/c^2)))-1)).  Now knowing the mass you can then calculate the Annihilation Energy with the equation AE=2mc^2.  DV Mod is calculated with the following equation DV Mod=SQRT(DE*AE/2)/SQRT(DE).  When calculating the DV Mod I assume that only half of the annihilation energy is only half as useful in damaging a target as KE due to annihilating particles producing gamma rays that go in opposite directions so that no more than half of this energy goes into the target.  However, I could be completely wrong on this point and if the AE should be weighted equally with the KE then the value below should be used.   
          DV 
Velocity  Mod
0.9c      1.6
0.8c      2.0
0.7c      2.4
0.6c      3.0
0.5c      3.7
0.4c      4.8
0.3c      6.5
0.2c      9.9
0.1c     19.9
The Antimatter Handling Equipment is based on the Antimatter Power Plants and assumes that about half of the equipment used in an AM Power Plant would also be needed for an APAW.  This works out to 0.25MW  worth of AM Power Plant being needed for each MJ of AE.  Finally, I figure that variable velocity APAWs would just be more expensive like gauss guns.

OK, that's it, any questions, comments, suggestions?

Chris Cox
(chirscox@dragonspace.com)