View source for 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 ===
* Snap shot of current pdf [[File:Detector_rf_20160720.pdf]]
** Feel free to send Toki .tex, .bib and figures 
* Intro
** Intro/Over all structure/ - POC Toki, Author Toki
** 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. - Various pwv 
** Finite size, POC Toki, Author Toki? Perhaps one author is not enough. Coordinate RaHul/ Jeff/ Roger/ Akito/ Toki/ 
* 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: Hannes/Ed/Toki (oxide, nitride, a-Si, single crystal si)
** Microstrip filter - POC: Toki - Author: Ari C. expect others to chime in (lumped and distributed design, comment on number of poles vs loss, channelizer)
** High-R filter - POC: Toki - Author: Erik S., Goddard Harvey's group for quasi-optical filter
** On Chip Modulator - POC: John R - Author: JPL (?) - John R to review documents from Al/Ed from previous efforts
** Cross-over - POC: Jeff - Author: Dan Becker, NIST design, UCB design, Goddard 2 layer design
* Back burner 
** Density of wiring - keep it light, muxing on chip
** Heat sink - POC Sherry, Author (back burner)

=== 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]]