2023-02-17 Notes

Need to hold cavern size iteration in order to allow RRL design to continue.  Justin provided history of layout iterations.  Layout 2, January 2022: Accommodation of stay-clear and design development resulted in 8' N-S extension.  Layout 3, June 2022:  Minor adjustment of Layout 2.  Layout 4 (current): refinement of design and removal of crane, includes spaces for cleanroom air returns.  MM: LRU size?  Based on NIF cart.  MM: Access to compressor vessel may be more accessible during planned downtimes.  BW: Has 3rd dimension been considered?  Stack SP diagnostic table?  TS: Need design development with Diagnostics Table and Beam Dump.  Air plenums - CH:  can be smaller, but something has to be there, e.g. thinner double wall plenum.  Need iteration with Arup.  MM: Being actively worked on between CH and CR.  Action is with CH as soon as they have the green light to work with Arup again.  T&H - in scope.  MM: What does team propose?  JG - layout/acess issues.  Lack of room for beam transport and associated HW on west wall.  MM: new info from Arup - west growth may be possible, but significant add to TPC.  Scope reduction may ben necessary.  TS: Concern that there is currently no space to spare.  BW: Not a new problem - same challenges with LCLS and FEH.  MM: Main concern is west wall, including beam dump.  BW:  Need to push on plenum, so everything can be pushed to east, solving west wall problem.