# Presentation: 839683

## SNAP R&DIn the JDEM Context

- John Marriner
- Fermilab
- December 6, 2005

## SNAP Collaboration MeetingFall 2004

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- 12/6/05

## SNAP Collaboration

| LBNL | G. Aldering, S. Bailey, C. Bebek, W. Carithers, T. Davis†, K. Dawson, C. Day, 
R. DiGennaro, S. Deustua†, D. Groom, M. Hoff, S. Holland, D. Huterer†, A. Karcher, 
A. Kim, W. Kolbe, W. Kramer, B. Krieger, G. Kushner, N. Kuznetsova, R. Lafever, 
J. Lamoureux, M. Levi, S. Loken, B. McGinnis, R. Miquel, P. Nugent, H. Oluseyi†, 
N. Palaio, S. Perlmutter, N. Roe, H. Shukla, A. Spadafora, H. Von Der Lippe, 
J-P. Walder, G. Wang |
| --- | --- |
| Berkeley | M. Bester, E. Commins, G. Goldhaber, H. Heetderks, P. Jelinsky, M. Lampton, 
E. Linder, D. Pankow, M. Sholl, G. Smoot, C. Vale, M. White |
| Caltech | R. Ellis, R. Massey†, A. Refregier†, J. Rhodes, R. Smith, K. Taylor, A. Weinstein |
| Fermi National Laboratory | J. Annis, F. DeJongh, S. Dodelson, T. Diehl, J. Frieman, D. Holz†, L. Hui,  S. Kent, 
P. Limon, J. Marriner, H. Lin, J. Peoples, V. Scarpine, A. Stebbins, C. Stoughton, 
D. Tucker, W. Wester |
| Indiana U.

IN2P3-Paris
    -Marseille | C. Bower, N. Mostek, J. Musser, S. Mufson

P. Astier, E. Barrelet, R. Pain, G. Smadja†, D. Vincent
A. Bonissent, A. Ealet, D. Fouchez, A. Tilquin |
| JPL | D. Cole, M. Frerking, J. Rhodes, M. Seiffert |
| LAM (France) | S. Basa, R. Malina, A. Mazure, E. Prieto |
| University of  Michigan | B. Bigelow, M. Brown, M. Campbell, D. Gerdes, W. Lorenzon, T. McKay, S. McKee,
M. Schubnell, G. Tarle, A. Tomasch |
| University of Pennsylvania | G. Bernstein, L. Gladney, B. Jain, D. Rusin |
| University of  Stockholm | R. Amanullah, L. Bergström, A. Goobar, E. Mörtsell |
| SLAC | W. Althouse, R. Blandford, W. Craig, S. Kahn, M. Huffer, P. Marshall |
| STScI | R. Bohlin, D. Figer, A. Fruchter |
| Yale U. | C. Baltay, W. Emmet, J. Snyder, A. Szymkowiak,  D. Rabinowitz, N. Morgan |
|  | †Institutional affiliation |

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## Dark Energy: A New Force of Nature

- Hubble Space Telescopefollow-up observations

- Terrestrial telescope discovers supernova

- Dark Energy: A New Force of Nature

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## Beyond Einstein

- Observatories:  large multi-user missions.
- Probes (small PI-lead missions).
- Dark energy is proposed to be one of the Einstein probes.

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## NASA/DOE Roadmap

- The Joint Dark Energy Mission will be a joint mission between NASA and DOE.
- The Joint Dark Energy Mission will be an observatory containing a telescope and appropriate focal plane instruments.
- The first ~3 years of the mission will be dedicated to a dark energy science investigation.
- The remainder of the mission will be used for general astronomical observations selected through an open, peer-reviewed competition.

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## Roadmap (continued)

- A joint oversight group (JOG) between NASA Headquarters and DOE Headquarters will provide mission oversight. NASA will retain responsibility and authority for ensuring the successful development of the mission within the guidelines set by the JOG.
- Overall project management will be at a NASA center. The appropriate NASA center will be identified through established NASA processes.
- Science oversight of the Joint Dark Energy Mission will be by a science oversight group (SOG).

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## Roadmap (continued)

- A joint NASA/DOE AO will solicit a dark energy science investigation requiring a space-based observatory.
- The dark energy science investigation will be a PI-led investigation. .... A successful proposer will have to provide the science payload ... as well as assemble the science team necessary to realize these goals.
- The primary criterion for selection of a dark energy science investigation will be the scientific merit .. and the merit of the proposed implementation ...
- A secondary criterion will be the ability of the proposed science payload to support a vigorous general observer (GO) program ...
- Whether the telescope is managed as part of the science payload ... or is managed by the JDEM project office will be determined through appropriate trade studies.

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## FY 05 Energy & Water Bill

*The conferees encourage the Department [of Energy] to proceed with the Dark Energy Mission even if the primary science of the mission and mission development must be pursued by the Department so as to avoid schedule delays resulting from implementing the mission jointly with NASA.  International cooperation and appropriate launch arrangements should be pursued where appropriate.*

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## NASA ROSES Competition(Research Opportunities in Space and Earth Sciences)

*It is the intent of this solicitation to provide sufficient support for the development of collaborations with independent approaches to the JDEM science investigation. As it is in the Government’s best interest to ensure the existence of viable competition in most selection processes, and in particular as it is NASA’s policy to vigorously compete all of its science investigations, it has been deemed programmatically important to facilitate the formation of multiple, strong teams of scientists who plan to propose in response to the future NASA/DOE AO for JDEM science investigations. To this end, it is anticipated that this solicitation will result in one or more awards for concept study support up to the amount of $2M per year for two years.*

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## NRC Report

- Contemporaneous with NASA’s roadmap process that produced the Beyond Einstein Program was the work of the National Research Council’s Committee on the Physics of the Universe, chaired by Michael Turner, which produced in 2003 the report *Connecting Quarks with the Cosmos: Eleven Science Questions for the New Century *(http://www.nap.edu/books/0309074061/html/). ... One of seven recommendations in their report is: “Determine the properties of dark energy. The Committee ... recommends that NASA and the DOE work together to construct a widefield telescope in space to determine the expansion history of the universe and fully probe the nature of dark energy.”

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## JDEM Mission Cost

*The Joint Dark Energy Mission is to be a medium-cost mission with a PI-led dark energy science investigation. JDEM is one of three Einstein Probe missions spelled out in NASA’s Beyond Einstein Roadmap, and, as such, has a total cost cap of $600M... Proposals responding to this solicitation for JDEM concept studies will be considered noncompliant if the proposed baseline mission costs are significantly above $600M, even if it is proposed that other domestic or international partners provide the additional funding.*

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## Timeline?

*Proposers should assume a total JDEM project lifetime of eight years beyond this concept study: two years for Formulation (Phases A/B including mission concept study and preliminary design), three years for Implementation (Phases C/D including mission final design, integration and test, launch operations, and in-orbit checkout) and three years of flight operations (Phase E including mission operations and data analysis). *

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## JDEM Management

*Overall JDEM study management will be provided by NASA’s Goddard Space Flight Center (GSFC) during the concept study period. JDEM project management, including the provision of a Project Manager and a Project Scientist, will be provided by a NASA Center during subsequent mission phases. The PI, however, is required to provide management within the collaboration, which includes delegation of roles and responsibilities to the collaborating institutions, each of which has an identified Co-Investigator responsible for her or his institution’s tasks. *

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## JDEMScience Definition TeamJune 2004 Charge to Team

- The SDT will provide input to DOE and NASA on priorities for the science questions of a space-based mission investigating the nature of dark energy.
- The SDT will produce a Science Requirements Document.
- The SDT will discuss all scientific aspects of the JDEM mission... for example, policy on the scientific use of the satellite during the general observer phase, the operation of the satellite, and data analysis and data archiving standards and policies.
- The SDT will undertake studies and provide input on topics requested by DOE or NASA or any future JDEM pre-project planning office ...

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## Dark Energy Task Force

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## AAACAstronomy and Astrophysics Advisory Committee

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## AAAC 2005 ReportDark Energy Task Force

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## Slide 19

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## Possible Schedule

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## Intermediate Processing & Storage

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## Slice Box

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## CCD Channel

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## NIR Channel

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## Flash Memory Radiation Tests

*These FLASH devices appear robust to TID of greater than 20 Krads. One lot of devices appear robust to greater than 50 Krads. SEUs observed with a low rate. Behavior to radiation is relatively uniform within each lot of devices*.

- 5 x 109 operations

- Observed SEUs

- Study SEUs

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## Conclusions

- JDEM and SNAP, in particular, are on the horizon.
- Official statements from DOE/NASA suggest that funding prospects for JDEM are good.
- SNAP appears well positioned relative to competing JDEM proposals.
- FNAL R&D goal is to having slice card working in a radiation environment for TRL6.

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