Argonne-2018: Cosmology with CMB-S4

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Workshop overview

Workshop Photo:
ArgonneWorkshop180305 32191D6.jpg

The CMB-S4 workshop at Argonne continues the successful series of workshops that bring together the CMB community to plan a coordinated, stage-4 ground-based CMB experiment.

The program for the two days of the main workshop will be developed below.

Meeting Info And Registration

ANL website with registration, lodging info, participants, logistical information
Map The workshop is being held at the APS conference center (401/402 on map)

Note: Foreign nationals must register by February 21 to allow sufficient time to process their gate pass which is required for access to the workshop venue at Argonne National Laboratory. Meeting registration closes for US citizens February 28.

Bluejeans Remote Connection Information
Bluejeans website

Phone Dial-in
+1.408.317.9254 (BlueJeans U.S. Toll)
+1.866.226.4650 (US Toll Free)
Global Numbers

Room information (capacity; Blue jeans ID)
Auditorium – 237 people on the main floor ; Meeting ID 891625568
E1100 – 32 classroom style; Meeting ID 407515684
E1200 / Gallery – 32 classroom style; Meeting ID 291545204
A1100 – 81 people; Meeting ID 543509186

About this wiki

As for previous workshops, we will use this wiki to organize the sessions and to capture the input from the sessions, and develop next steps. Initial page stubs will be provided for each break-out session. The wiki will be used during the break-out sessions, and also for the plenary session. Participants are encouraged to edit the wiki directly, including uploading plots or a few slides.

Hints for formatting this wiki can be found here:


Working draft agenda below. Check back for updates

CMB S4 Workshop March 5-6 (all day) with splinter group meetings on March 7 morning

Monday, March 5

08:00 Coffee
08:30 Welcoming Remarks

  • Paul Kearns (Director, Argonne National Laboratory)
  • Marcel Demarteau (ANL HEP Division Director)
  • Amy Mikuta (ANL, Safety Presentation)
  • Workshop overview and goals (John Carlstrom) File:WelcomeGoals.pptx
Names for CMB-S4

09:00 - 10:30 Plenary: Presentation and Discussion Governance Bylaws and Election process
[Session Coordinators/Moderators: ICCC Chairs Suzanne Staggs and John Carlstrom]
Note: Times for this session are approximate, extra time built in for discussion

For reference, circulated draft of the bylaws: File:CMB-S4 Bylaws 180227.pdf
Revised bylaws for wrap-up plenary discussion: File:CMB-S4 Bylaws 180306 v1.pdf
Marked up Bylaws showing changes made since workshop in red: File:Bylaws markup 20180311.pdf
Version 1.0 of Bylaws for ratification by collaboration: File:Bylaws v1.pdf

Google doc for Recording Motions and Votes

Google Docs for Minutes on Bylaws and Suggested Changes

10:30 - 11:00 Coffee Break (time approximate)

11:00 - 12:30 Plenary: Presentation and Discussion Governance Bylaws and Election process (continued)

12:30 - 01:30 Group Photo and Lunch
If raining photo to be taken Tuesday over lunch

Afternoon goals: Project planning and preparation for decadal
Session notes

02:00 - 03:40 Plenary: Project Planning and Preparing for Decadal Survey
[Coordinators: pPDG chair Jim Yeck, ICCC co-chairs John Carlstrom & Suzanna Staggs]
[Moderator: Suzanne Staggs]

02:00 – 02:05 Session Introduction [Jim Yeck]
02:05 – 02:20 Concept Definition Task Force Strawperson Plan [Adrian Lee]

  • Major conclusions
  • Requirements and experimental scope
  • What the CDT report did not cover

02:20 – 02:50 Project planning and role of the pPDG [Jim Yeck] File:PPDG Update 05Mar2018v2.pdf

  • project planning overview; the pPDG
  • DOE Critical Decisions (CD0-4) and NSF MREFC milestones
  • proposed agency timeline
  • technical decision timeline
  • future plans

02:50 – 03:05 Project lessons being learned from Simons Obs. [Mark Devlin] File:CMBS4 SO lessons learned.pdf
03:05 – 03:25 Decadal Preparation Plans [John Carlstrom] File:CMB-S4 DecadalPlanning v2.pdf

  • Decadal Survey process and timeline
  • Collaboration planning for Decadal Survey
  • Decadal Survey Conceptual Design Report
  • Reference design (what, why, when)
  • Purpose of tomorrow’s parallel session, review session charges

03:25 – 03:40 Updating the A&A Science case for the Decadal Survey [Tom Crawford] File:Decadal science case intro crawford.pdf
03:40 - 04:00 Discussion

04:00- 04:25 Coffee Break

04:25 - 06:05Plenary: Technology Development Working Group Update and the Path Forward
Session notes
[Coordinator: Brad Benson]
[Moderator Jeff McMahon]
(Update: goals, status, timeline; relation to simulations and forecasting groups)

04:25 – 04:40 TD Input to CDT [Zeesh Ahmed] File:2018-03-05 TD Developments after Harvard.pdf
04:40 – 04:55 TD Community Overview and Organization [Toki Suzuki] File:2018 03 05 S4 TDIntro.pdf
Evaluation Metric Spreadsheet
Technology Development on the CMB-S4 wiki
04:55 – 05:55 Summary from TD Sub-Groups (15 min each)

05:55 – 06:05 Reference design properties for parallels [Brad Benson] File:Reference design properties.pdf| pptx
06:10 – 06:25 1-minute poster advertisements [Coordinators: LOC]
[Moderator: Lloyd Knox]

06:30 - 08:00 Reception and Poster Session
There will be a poster session held during the reception the first night of the CMB-S4 Collaboration Meeting. We encourage posters that cover CMB-S4 science topics as well as new analysis and technical results from current CMB experiments. Early career scientists (esp. graduate students, postdocs), new participants in the CMB-S4 process, or anyone who enjoys discussing new science over food and drinks are highly encouraged to submit a poster. Posters will remain up for the length of the meeting. Following the procedure at the last workshop, each poster presenter will be given a one minute to speak to give the highlights of their poster(s). One minute per person, no matter how many posters.
Poster list here [1]

Tuesday, March 6

8:00 Coffee
8:45 Announcements and Parallel Session Room assignments

NOTE There will be an Argonne site-wide Tornado Drill at 10 am. S4 meeting attendees do not need to participate but be aware that site-wide alarms will briefly sound. A safety overview will have been presented at the beginning of the meeting.

Morning goals: Towards the CDR for the Decadal Survey

Parallel Sessions

(not requesting standard talks, but actionable steps for advancing CMB-S4, especially for the decadal input document and the 2nd edition of the Science Book)

Charge for Readout; Detectors; Telescopes; Cryostat and cold optics; and Reference design parallel sessions:
The goal is to determine as much of the reference design for CMB-S4 as possible at this workshop.

  1. Starting with the major systems or components and work toward the details, i.e., type of detectors, then materials:
    • For what parts of the reference design do we have consensus?
    • For which major parts of the reference design are you not able to reach consensus? Why?
    • Keeping in mind that the reference design is not the final design, what information is needed so that a decision can be made by end of March.
  2. What are viable options that may be considered? (viable includes ready when critical designs need to be made)
    • Which do we want to mention in the decadal input and why?
    • (Suggestion: prior to the workshop, the parallel session coordinators and other interested parties circulate some information about what sorts of things we’d hope could reach consensus during the workshop, e.g., which FPGA does not have to be settled now.)

Charge for parallel sessions related to extending the science case for the Decadal CDR:
The goal is to set the path for drafting new chapter(s) for the revised science book to cover extending the science case, this will also be used for the decadal survey input document.

  1. Determine the chapters topics (titles) and outlines, i.e., scope.
  2. Determine the needed simulations and forecasting, as well as key measurement requirements.
  3. Identify core people to do the work for completing draft by November

Charge for simulations and forecasting parallel sessions:
The goal is to identify the forecasting requirements, schedule, and responsibilities for the coming project definition phase, with a particular focus on the immediate needs of the decadal survey input document and the extended science book.

  1. Inform the definition of the reference configuration and options
  2. Determine how to extend the realism of the forecasting instrument and observation models to reflect the detailed reference configuration and options
  3. Determine how to extend the reach of the forecasting data sets to support the full spectrum of science goals

09:00 - 10:00 Parallel sessions P1

10:00 - 10:15 Coffee Break (During Tornado Drill)

10:15 - 11:15 Parallel sessions P2

11:15 - 11:30 Break between sessions

11:30 - 12:45 Parallel sessions P3 (note this session is longer)

12:45 - 02:00 Lunch

02:00 - 03:45 Plenary: Conclusions from parallel sessions
[Moderator: Julian Borrill]

03:45 -04:15 Coffee break

04:15 - 05:30 Plenary: Workshop wrap up

  • Next steps for establishing collaboration [TBD]
  • Decadal Survey preparation goals for next 6 months [TBD]

File:Bylaws argonne plenary updates.pdf
File:Governance Bylaws Changes.pdf
Publication changes

Wednesday, March 7

(splinter group meetings)
08:00 Coffee
08:00 - 09:00 ICCC [STS and JC] CANCELLED
08:00 - 09:00 Joint Plenary for Forecasting/Reference Design [Lloyd, Zeesh et al] Auditorium
09:10 - 11:00 Forecasting for the Decadal CDR [Lloyd] Coffee break room
09:00 - 11:00 Refining the Reference Design [Brad, Zeesh, + TBD] E1100 + E1200

Poster Session

If you are planning to bring a poster please sign up here with your name and the title of your poster. The boards for holding posters are 30x40" but posters can be 36x48". Any orientation is fine.

(Alphabetical Listing)

  • Aamir Ali (Berkeley) - "Small Aperture Cameras for the Simons Observatory"
  • Adam Anderson (Fermilab) - "On-Sky Performance of Frequency-Domain Multiplexing Readout for SPT-3G"
  • Peter Ashton (UC Berkeley/LBNL) - "Design and development of a cryogenic continuously-rotating achromatic half-wave plate for CMB polarization modulation on POLARBEAR-2"
  • Patricio Gallardo (Cornell) - "Modeling large angle sidelobes for large aperture CMB experiments"
  • Kevin Huffenberger (Florida State University) - "Cosmic Microwave Background Mapmaking with a Messenger Field"
  • Heather McCarrick (Columbia) - "First optical tests of OMT-coupled, multi-chroic MKIDs"
  • Heather McCarrick (Columbia) - "Measured performance of horn-coupled, dual-polarization LEKIDs for CMB polarimetry"
  • Pavel Motloch (University of Chicago, KICP) - "Consistency of gravitational lensing in CMB data"
  • Zhen Pan (UC Davis) "Signatures of Self-Interacting Dark Matter in the Matter Power Spectrum and the CMB"
  • Alessandro Schillaci, Howard Hui, Lorenzo Moncelsi (Caltech) - "BICEP Array 30-40 GHz receiver design"
  • Sara Simon (UMichigan) - "Calibration, Sensitivity, and Systematics Modeling for Simons Observatory"
  • Aritoki Suzuki (LBNL) - "Increasing Superconducting Detector Fabrication Throughput with Commercial Foundry"
  • Eve Vavagiakis (Cornell) - "Magnetic Sensitivity of AlMn TESes and Shielding Considerations for Next Generation CMB Surveys"
  • Ningfeng Zhu, John Orlowski-Scherer, and Zhilei Xu (UPenn) - "Simons Observatory (SO) Large Aperture Telescope Receiver (LATR) Design Overview "