I've updated the TCS SIM section of the front end. The changes are summarized here:

• Added named EPICS channels that correspond to the arm powers in Watts:
  • H1:TCS-SIM_XARM_POWER
  • H1:TCS-SIM_YARM_POWER
• Fixed the implementation of the SILICA_REFRACTIVE_INDEX in the PRC/SRC ABCD matrices. Radii of curvature were previously mutliplied by this instead of being divided by it.
• Moved the section of the RECYCLING_CAVITY_ABCD matrix calculation corresponding to propagation from the ITM_AR surface to the RM to a separate section in the library. (It's on the same page but is now detatched, graphically, from the main calculation and linked in with From/Gotos). This helps clean up the library and also allows future propagation of calculated Guassian modes from the ITM to the RM (for calculation of mode-overlap of the ARM cavity mode with the SRC, for example).
• Added a COMMON_ETM_ROC EPICS channel
• Added a library block, ARM_ABCD, that calculates the arm cavity round trip ABCD matrix in this order (reflect off ITM, propagate to ETM, reflect off ETM, propagate to ITM).
• Added a library block, CAV_GAUSSIAN_MODE, renamed to COMMON_ARM_GAUSSIAN, that calculates the common mode Gaussian beam parameters at the ITM.