The North America Array Technology Development and the Realization of the SKA-High Steven T. Myers & Jim Ulvestad NRAO 15 Oct 2009 USSKA Consortium Meeting.

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Presentation transcript:

The North America Array Technology Development and the Realization of the SKA-High Steven T. Myers & Jim Ulvestad NRAO 15 Oct 2009 USSKA Consortium Meeting Pasadena, CA

The North America Array is... Technology development and prototyping program for the SKA-high component Fully part of US and International SKA program Some NRAO specific aspects Concept development for the expansion and incorporation of the EVLA/VLBA as the “SKA- high”, sited in North America SKA-high siting proposal in Astro2020 and construction in 2022+

Decadal Activity Subject of RFI response to RMS Program Prioritization Panel (Myers et al.)‏ Also asked to submit RFI-2 response (28Jul09)‏ Components: NRAO participation in SKA-mid precursors and pathfinders, such as MeerKAT and ATA Continue and expand SKA TDP (TDP-II), extending to SKA-high antenna evaluation and NAA preparatory R&D Construct a NAA Prototype Antenna Station connected to EVLA, develop SKA-high costing model and NAA site concept

Decadal RFI Documents Original RFI-1 (Apr09): Response RFI-2 (Jul09): Differences: Total cost $39850K (FY09), was $31250 RFI1 (added managment, antenna prototype, station construction and testing, removed assumption of contributed effort)‏

NAA/SKA-high Science Goals Mostly taken from Astro2010 Science White Papers, broken down into those 5 areas CFP: megamasers (dark energy, BH masses), weighing dark matter (lensing), GCT: imaging galaxies in early Universe (lines, continuum), PSSF: protoplanetary disks SSE: super-star clusters and supernovae, SNe and GRB, obscured pulsars and motions TGN: Local Group motions

High-Level “Design” SKA-high goals GHz top-level spec A/T = 5000 m 2 /K (~20 x EVLA)‏ NAA concept 1-50 GHz capability “core” 5-45 GHz, two 3:1 bands (5-15, GHz)‏ At least 10 x EVLA sensitivity 5 x EVLA on baselines < 500km Grow from EVLA + VLBA + GBT +ATA?

TDP-II 3 years ( ) $18350K Was $13450K in RFI1, added explicit management line and antenna prototyping Goals: Continue and expand SKA TDP-I Evaluate TDP/PrepSKA antennas for higher frequency operations to guide SKA-high design also useful for a 2 nd round of SKA-mid prototyping NAA concept development, initial SKA-high design Design for NAA Prototype Antenna Station and site Added: NAA Antenna Prototype (continued in PAS)‏

TDP-II Components Antenna Evaluation Data Transmission Digital Signal Processing Digitization Monitor & Control Wideband Feed/Receiver Algorithms, Computing, Software SKA-high/NAA Concept Design Added: Antenna Prototype

NAA Prototype Antenna Station 4 years ( ) $21500K Was $17800K in RFI1, added management, personnel for PAS construction and testing (no assumed contributed effort, as in RFI1)‏ NAA-PAS Goals: 1 year detailed design 3 year prototype construction and evaluation Develop SKA-high costing model Develop NAA site proposal for SKA-high CFP Preparation for SKA-high Astro2020 proposal Preparation for SKA-high construction 2022+

NAA Milestones (from RFI2)‏ Schedule of key TDP-II and NAA-PAS tasks (RFI2 table 5.4)‏

NAA Proposed Cost Breakdown Table 6.1 from RFI2 response (Myers et al.)‏

Other aspects NRAO SKA Program Office (Ulvestad)‏ Connection to SKA-mid Augment antenna evalution in probably 1yr of extra TDP-II ~ $4M Dish verification using EVLA Eventually extended testing using NAA-PAS What comes after PrepSKA? Scheduling of activities to enhance not collide Revisit SKA-high science case ~ next decade “knowledge explosion” ALMA, EVLA, GSMT, LST, JWST, Herschel, Planck,...

Comments and Issues Science case room for improvement! new cases, e.g. the CO Cosmic Web TDP-II scope and organization intent: organized as TDP-I with USSKA more direct NRAO involvement/funding international participation? need to propose in 2011 (or 2010)‏ NRAO, SKA, EVLA and NAA (also Jim's talks)‏ ALMA & EVLA personnel move off construction

Food for thought this meeting TDP-II  Maintain momentum if positive Decadal review  When do we want to submit proposal for TDP-II?  What planning do we want to do now (schedule)?  Broaden the consortium base (science & tech)? NAA-PAS  Plan is lean, international partners? Bigger Issues  N.A. site for SKA-high from SKA-international view?  What happens if SKA-mid schedules slip?