Detector RF/Bandwidth/Resolution

CMB S-4: Detector RF Design, Total Bandwidth, Resolving Power

Team:

Charge: Report back on range of frequency coverage and practical number of bands.

Meeting 04: 2016-07-05

• This group's charge: Detector RF Design, Total Bandwidth, Resolving Power but excluding TES bolometer/MKID (readout)
• Announcement: s4_instrument mailing list will be setup soon. 1 mailing list for all instrument related white paper discussion
• White paper time line: Circulate draft to larger community by August 31st
  • .tex file at github I contacted Tom Crawford to get an access...
  • git clone https://github.com/CMB-S4/Memos.git
  • Main .tex detector_rf.tex
  • Survey of current technology and development
  • Summarize necessary development for CMB-S4 - No down selection yet
  • Collect references

• Let's get started on things we can work on
  • Sarah for horn
  • Toki for sinuous lenslet
  • CLASS detecor technology - I think their single crystal silicon transmission line dielectric fabrication technique is very unique
  • Mutlimode direct coupling (Akito)
  • Phase array
  • Volunteer for multi-chroic filter design?
  • Volunteer for Mapping speed/atm/foreground (background material)

• Meeting Note

Meeting 03: 2016-06-16

• Deliverable: White paper by next S-4 meeting in September (6 more meetings to go)
  • .tex file at github
  • git clone https://github.com/CMB-S4/Memos.git
  • Main .tex detector_rf.tex
  • Outsource writing tasks to experts (our task is to bring back .tex, .png, .bib)
• Generic goal:
  • Keep doors open - no down selection
  • Survey of current technology and development
  • Summarize necessary development for CMB-S4
  • Collect references
• Scope/topics to address
  • Total bandwidth per feed
    • Broadband RF technology
      • Feed
      • RF circuit
    • Mapping speed
      • Diffraction
      • Cold stop and telescope temperature
      • Loss in optics (AR and lens material) and RF circuit line (choice of dielectric for ex)
  • Resolving Power
    • Need from foreground subtraction group
      • Just point to their write up
    • Atmospheric window
    • Hardware requirement
      • Finite area on silicon wafer
      • Increase number of readout channels
  • Should we add/subtract scope from this group?
• Assign writing task
  • Hardware
    • Broadband RF technology (1.0 page)
    • Hardware requirement on resolving power (1.0 page)
  • Background Material
    • Mapping speed (1.0 page)
    • Atmosphere (0.5 page)
    • Foreground (0.5 page)

• Meeting Note
  • Participants: toki, clarence, mike, akito, bryan, jeff
  • we have additional detector systematics group (mike sent out lists of group)
  • what is trade off between total bandwidth
  • zeesh is leading readout group - discuss if combining detector (TES/MKID) into readout makes sense
  • trade off between too many / broader participation to be inclusive
  • contact XXX if you want to get involved
  • TES/MKID for readout group cause delay? - probably not
  • include Mike N. to readout group
  • send note to whole community - pass by john c. - send out note to whole s4 group
  • we are missing group to put whole thing together
  • how about 2-stage approach. we collect current state of technology for now. then optimize/tie together later
  • optimize/tie together to come after science book
  • re-name systematics group to systematics and system over view?
  • keeping systematics group shows that we are thinking about systematics and its mitigation
  • no body knows about what systamtics to worry about at CMB-S4 level
  • separate group's writing
  • how to select co-leader?
  • cryogenic receivers group does not exist (ask brad to lead?)
  • systematics group can suggest what simulation/study is necessary
    • describe different experiment's approach to systematics
    • summarize literature on analysis technique
    • summarize experiment's approach

• Action Item
  • jeff to put together preamble and send out with mike n's list of groups
  • jeff to ask zeesh to agree on adding tes/mkid to readout
  • natural point
    • sarah for horn
    • sinuous lenslet
    • roger phase-array
  • mapping speed/atm/foreground (background material)
  • next meeting in 2 weeks. maybe we'll get more participants. Toki's organize meeting (doodle, call invitation what not)

Meeting 01 and 02 note from google doc

File:CMBS-4WhatresolvingpowerisdesirablepracticalMeeting0102.pdf