Booster Bias Supply Upgrade April 2, 2014

First prototype was started in December The back half of the supply was totally gutted Transformer Interphase reactor SCR/heat sink assemblies All water hoses Relocated various chassis and supplies  A few need re-wiring Assembled as much as possible to finalize layout Huge relief when it was verified that everything was going to fit without a major overhaul

Slow going on first supply  Not worked on full time  Many delays with materials and parts  Many discussions and decisions on final layout  High priority on ease of future maintenance  Second gutting for final hole drilling, documenting and installation of plated parts.  Made “doubles” of many parts

◦Now have two techs from EE Support (80%)  High current copper bus bars  Need 10 of these which are very labor intensive  Flexible copper straps  Need 120 of these  Fairly tedious to assemble, solder and drill  SCR/heat sink assemblies  Need 20 of these

◦Next bias supply rehab: Much faster!  Layout is finalized and documented.  Have 80% of parts and material on hand  Few more in-house machine shop jobs  Off-the-shelf electrical parts  EE Support techs working on labor intensive assemblies  ~2 month turn-around on next supply  Training full-time worker  Ordering remaining parts  Remaining supplies have solid wall separating front and back, possibly creating a few problems  ~1 month turn-around thereafter