Detector RF/Bandwidth/Resolution

Charge: Detector RF Design, Total Bandwidth, Resolving Power but excluding TES bolometer/MKID (readout). In short, antenna to termination resistor

Meeting 06: 2016-07-21

• Feed
  • Horn - POC: Jeff - Author: Sara - Horn/ OMT/ MKID Coupling/ Hybrid-T, multiple pages OK
  • Sinuous - POC: Toki - Author: Toki - Lenslet-Antenna
  • Phase Array - POC: Toki - Author: Roger
  • Multimode Detector - POC: Akito - Author: Kevin
• RF components
  • Transmission line dielectric loss - POC: Jeff - Author: TBD (oxide, nitride, a-Si, single crystal si)
  • Microstrip filter - POC: Toki - Author: Ari C. (lumped and distributed design, comment on number of poles and loss also)
  • High-R filter - POC: Toki - Author: TBD, ask Erik S. who should write(on-chip spectrometer)
  • On Chip Modulator - POC: John R - Author: TBD, ask Ed Wollack who should write
  • Cross-over? Mode filter? - POC: TBD - Author: TBD
• Background Material
  • Atm/Foreground - POC: Colin B. - Author: Colin B. (Foreground, atmospheric window, number of bands) (background material, so just intro to these topics)
  • Mapping speed/ Sensitivity per band as a function of bandwidth - POC: Toki - Author: Charlie H. (or Toki as backup) (background material, so just intro to these topics)
  • Finite size of detector pixel and number of bands we can fit (feed, filter, bolo etc) - POC: TBD - Author: TBD

Meeting 05: 2016-07-14

• This group's .tex at 2016CMBS4ScienceBook\Memos\Instrumentation\detector_rf\

• We are assigning Point of Contact (POC) and candidate authors. POC's job is to collect .tex, .bib and figures
• Feed
  • Horn - POC: Jeff - Author: Sara - She gave some text and figures to Jeff to help out while she is busy (include horn + OMT?)
  • Sinuous - POC: Toki - Author: Toki - Sinuous/Antenna Lenslet Technology - Start writing after July 13th
  • Phase Array - POC: Toki - Author: TBD, ask Roger who should write
  • Multimode Detector - POC: Akito - Author: TBD, Akito/Al to discuss who should write (can be short)
• RF components
  • Transmission line dielectric loss - POC: Jeff - Author: TBD (oxide, nitride, a-Si, single crystal si)
  • Microstrip filter - POC: Toki - Author: Ari C. (lumped and distributed design, comment on number of poles and loss also)
  • High-R filter - POC: Toki - Author: TBD, ask Erik S. who should write(on-chip spectrometer)
  • On Chip Modulator - POC: John R - Author: TBD, ask Ed Wollack who should write
  • Cross-over? Mode filter? - POC: TBD - Author: TBD
• Background Material
  • Atm/Foreground - POC: Colin B. - Author: Colin B. (Foreground, atmospheric window, number of bands) (background material, so just intro to these topics)
  • Mapping speed/ Sensitivity per band as a function of bandwidth - POC: Toki - Author: Charlie H. (or Toki as backup) (background material, so just intro to these topics)
  • Finite size of detector pixel and number of bands we can fit (feed, filter, bolo etc) - POC: TBD - Author: TBD

• Note from the meeting
  • On call: Jeff M, Ari C, Sherry C, Akito K, John R, Toki S
  • Feed
    • Horn - Sara emailed first draft. Jeff edit. Second draft circulated to Hannes. It should be available by next meeting. Include OMT in this write up. 1.5~2.0 pages. Include Brad J. horn fed kid coupling. Include Hybrid-T as well.
    • Sinuous, expand this topic to lenslet-antenna coupled feed
    • Phase Array - Roger agreed to write. Waiting for sinuous example
    • Multi-mode detector Al/Ed - Peter to write Kevin, graduate student
  • RF components
    • Transmission line - POC Jeff - Authors Hannes/Ed/Toki - NIST's work on nitride and a-Si, Ed single crystal, Toki for UCB nitride if necessary
    • Filters - POC Toki, Ari C to write. If people want to contribute on filters, it will be ok extra length (most likely this will happen)
    • Spectrometer on chip - POC Toki - Try to get Erik S to contribute. Also ask Goaddard, Harvey's group - quasi optical spectrometer
    • Modulator on chip - POC John R , Al Kogut wrote a review before. No longer working on this. Ed Wollack is also not working on this. Received bunch of references. Power dissipation is a concern. Write 1/2 page summary to summarize current status and concern. Also - email Jamie to find out JPL's activity on this
    • Cross-over / Pass-under, POC Jeff: Author Dan Becker? New design from NIST, Happy to contribute UCB design as well. Goddard's no-extra layer cross-over?
  • Background Material
    • Finite size, POC Toki, Author Toki? Perhaps one author is not enough. Coordinate RaHul/ Jeff/ Roger/ Akito/ Toki/
    • Mapping speed - above 200 GHz two sites are different, Charlie H, different pwv
  • Intro
    • Intro/connecting - Toki
  • Back burner
    • Density of wiring - keep it light, muxing on chip
    • Heat sink - POC Sherry, Author (back burner)
  • Please send .tex, .bib and figures to Toki if you don't want to deal with .git
  • Same meeting time (10 AM PDT, Thursdays), John R. has time conflict. Toki to follow up John R. for email updates

Meeting 04: 2016-07-05

• This group's charge: Detector RF Design, Total Bandwidth, Resolving Power but excluding TES bolometer/MKID (readout). In short, antenna to termination resistor

• Announcement: s4_instrument mailing list will be setup soon. 1 mailing list for all instrument related white paper discussion - send email to larger group
• 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

Feed

• • Sara - Horn Princeton (corrugated/non-corrugated)
  • Toki - Sinuous Lenslet
  • Ed Wallack, Who to write - CLASS detecor technology - I think their single crystal silicon transmission line dielectric fabrication technique is very unique
  • Akito/Al Kogut - Mutlimode Direct Coupling (could be short)
  • Roger - Phase Array

• • John R - On Chip Modulator, Ed
  • Toki - Multi-chroic filter design
  • Eric Shirokoff - music like filter/ MKIDs/ high resolution filter

• • Colin Bishop - Atm/Foreground (background material)
  • Toki - Mapping speed/ Sensitive per band

Write up:

• 1-page, one to two figures, bibtex for citation
  • intro of technology
  • survey current status
  • R&D for S4

We should also add (suggestion from Jeff)

• we should put the OMT design into feed section since it is a limit on the achievable bandwidth of the horn coupled systems
• we should discuss dielectric materials somewhere (eg silicon oxide vs silicon nitride vs single crystal silicon) perhaps in RF tricks.

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