LBNL-2020: Cold Optics

Charge

With CD-1 coming up roughly one year from now we have to move to technology selection in the next half year. To meet this need we will have to have a review midyear. This session represents a first step toward this review where we will assess the technological performance and our ability to manufacture the required optical elements.

• discuss the LAT and SAT needs for cold optics (performance and production requirements of the LAT and SAT options)
  • metal mesh filters
  • alumina filters and lenses
  • silicon lenses
  • other filters
  • HWP (optional)
• describe the currently demonstrated status of the required technologies to meet both the technical and production needs.
  • Is there an existing supply path? If not how do we address that risk?
  • Discuss any risks to production (e.g., is the alumina or other material supplies secure?)
• What is the development path? Will it be done by CD-1 or require post CD-1 work?
  • Summarize/update technical risks, R&D / simulation needs to retire those risks.

Agenda

• Overview of LAT cold optics needs (Niemack)
• Overview of SAT cold optics needs (Kusaka)
• filters (Tucker)
• silicon lenses (Golec)
• alumina optics (mention if these coatings are applicable to sapphire)
  • laminate (Viera)
  • epoxy (Kusaka)
  • thermal spray
  • laser
  • metamaterail (Golec)