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