Difference between revisions of "LBNL-2020: Cold Optics"

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== Charge ==
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== Charge ==
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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)
 
* discuss the LAT and SAT needs for cold optics (performance and production requirements of the LAT and SAT options)
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** Summarize/update technical risks, R&D / simulation needs to retire those risks.
 
** Summarize/update technical risks, R&D / simulation needs to retire those risks.
  
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== Agenda ==
  
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Call in via Zoom: https://lbnl.zoom.us/j/189656154
  
== Agenda ==
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Notes can be found here: https://docs.google.com/document/d/1win-exuExCS06CCN4JrH5tErXSio8yX50OJ_v_EUeCE/edit
 
 
  
* Overview of LAT cold optics needs
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* Overview of LAT cold optics needs [[file:Receiver_optics_numerology_20200305.pdf]] (Niemack) Note: alternative TMA cold optics configurations are still being studied [https://docs.google.com/presentation/d/1JIolo8FpjtXO1Hr8ZtG00-LQ-hrp1T9WAO708K4o1LA/edit#slide=id.g82958b8f8c_0_0 as described here]
* Overview of SAT cold optics needs
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* Overview of SAT cold optics needs (Kusaka) https://docs.google.com/presentation/d/1vFF59Qm_OEtMFR66J4tLmmSsXSuATZewfjd4nj5mGlE/
* filters
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* filters (Tucker) [[File:Optical_filters_for_S4_April_2020.pdf]]
* silicon lenses
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* silicon lenses (Golec) [[File:Silicon_Lens_AR_Production_CMBS4.pdf]]
* alumina optics
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* alumina optics (mention if these coatings are applicable to sapphire)
** laminate
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** laminate (Vieira) [[File:CMB-S4_cold_optics_illinois_March2020.pdf]]
** epoxy
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** B/K laminated coatings for alumina (Marion) [[File:20200401_CMBS4_epoxy_coatings_Dierickx.pdf]]
** thermal spray
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** epoxy (Hill) [[File:20200401_epoxyARonSapphire_cmbs4Meeting.pdf]]
** laser
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** thermal spray (Lee) https://www.dropbox.com/s/qstwm77yt2lt51u/Thermal_Spray_ARC_Lee_Jeong.pdf?dl=0
** metamaterail
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** laser (Tomo) [[File: 20200401_S4remoteworkshop.pdf]]
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** metamaterail (Golec) [[File:Alumina_mmAR_s4_lbnl2020.pdf]]
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* Production and acquisition of alumina lenses
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** Akito (w/ input from Masaya Hasegawa @ KEK, Japan)
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*** Vendor: NTK technologies (formerly known as Ceratec Inc.) http://www.ntktech.com/
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*** Material: 99.5% LD (low loss type: https://www.ceratech.co.jp/en/product/material/alumina/a9951ld/)
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*** Shaping: shape and bake (no machining after baking), desired accuracy achieved (~+-25um across ~60cm lens), flange and holes can also be done.
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*** Precedent: PB2a lenses and filters, SO SAT and LATR filters.
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** B/K Lenses (Marion, Ben S.) [[File:20200401_CMBS4_Lenses_Dierickx.pdf]]
  
 
== Notes ==
 
== Notes ==

Latest revision as of 10:56, 1 April 2020

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

Call in via Zoom: https://lbnl.zoom.us/j/189656154

Notes can be found here: https://docs.google.com/document/d/1win-exuExCS06CCN4JrH5tErXSio8yX50OJ_v_EUeCE/edit

Notes