Mid freq Aperture Array Technology The MFAA Element
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1 AA Consortium Mid freq Aperture Array Technology The MFAA Element Jan Geralt Bij de Vaate
2 Why MFAA? DRM 1.0, for SKA2, Survey Requirement Speed m 4 deg 2 /K 2 Large FoV 100 deg 2 Freq 450(350)-1450 MHz Processing advantages DRM -> System requirements for SKA2?
3 EMBRACE Physical delay Receiving array Combiner Artificial delay Output
4 EMBRACE design drivers Frequency range Area Analogue beamforming Independent FoV 2 Digital beams MHz 150m 2 WSRT 80m 2 Nancay 64 elements
5 EMBRACE
6 Observations with EMBRACE Pulsar B MHz
7 From EMBRACE to AERA 3 to SKA2 Issues to be resolved; Power consumption Cost: > 1000/m 2 Performance, calibratebility, T sys
8 Ω (deg^2) Aeff/Tsys (m^2/k) SKA System Two options for AA-mid realization: 1: Large Aeff 2: Large processing backend DRM Design Design Frequency (MHz) 1,E+03 1,E+03 8,E+02 DRM 1.0 Design 1 Design 2 Design1: 30/70% Front-end / Backend 2012 technology 6,E+02 4,E+02 2,E+02 0,E Frequency (MHz)
9 Survey speed (m^4deg^2/k^2) Performance Survey speed 2,E+10 2,E+10 1,E+10 1,E+10 DRM1.0 Design 1 Design 2 1,E+10 8,E+09 6,E+09 4,E+09 2,E+09 0,E Frequency (MHz)
10 Computing per 100MHz for full FoV Ref Stefan Wijnholds, SKA Oct Eng meeting
11 MFAA Consortium 1. ASTRON Management, System, Prototyping 2. Observatoire d Paris Front-end Chips 3. University of Bordeaux ADC 4. University of Cambridge System 5. University of Manchester ORA 6. KLAASA (China) Industrial design, Prototyping 7. Associate members: Portugal, IT Renewable energy, RFoF University of Malta South Africa Site, array design Stellenbosch University Mauritius array demonstration Focus on Front-end, LFAA will work on Digital Signal Processing
12 Consortium organogram Role Level 4 Responsibility Proposed Affiliation Consortium leader SKA.TEL.MFAA Jan Geralt Bij de Vaate ASTRON Project Manager Andre van Es ASTRON Project Engineer Andrew Faulkner UCAM Project Scientist Steve Torchinsky OBSP PA/PQ Manager Marchel Gerbers ASTRON Taks Leader SKA.TEL.MFAA.SE Andre Gunst ASTRON Task Leader SKA.TEL.MFAA.FED David Zhang UMAN Task Leader SKA.TEL.MFAA.RE Guy Kenfack OBSP Task Leader SKA.TEL.MFAA.SP Kris Zarb-Adami Malta Task Leader SKA.TEL.MFAA.PROT Pieter Benthem ASTRON
13 SK MFAA Schedule AERAP / MFAA AIP Pre-Con Stage1 Stage2 SKA 1 SRR PDR
14 Front-end proto typing
15 Front-end proto typing
16 MFAA
17 Octagonal Ring Antenna (ORA) Electromagnetic reception performance of basic ORA array has been verified Finite ORA array (1m 2 in area) integrated with LNAs has been measured with the lowest noise temperature of 39K ORA with AVAGO MGA16116 simulated
18 Noise temp AAs
19 KLAASA Front-end prototyping Performance and cost of the Vivaldi Antenna arrays comparision in a metal array and a dielectric-slab Finite Metal Vivaldi Antenna array (9m 2 in area) integrated with LNAs Material and manufacturing method with low cost will
20 Next steps AERAP supported engineering work Student exchange, MIDPREP, NWO-NRF exchange money 3x3 m 2 arrays, Mauritius, Stellenbosch, Durban New Tile evaluation, new array SAAO Beamforming software Calibration, Imaging AERAP 3 -> Ilse
21
22 Transients No substitute for Field of View!
23 Freq range Transients MHz ( ) Cosmology MHz ( ) HI continuem MHz (don t bother) Cosmic Magnetism MHz (750) Local HI MHz Pulsars MHz Neutral gas
24 Baseline Transients Cosmology 60m HI continuem 5km Cosmic Magnetism m Local HI 1000m Pulsars Neutral gas
25 Field of View Transients 175 deg 2 Cosmology 25 deg 2 HI continuem Cosmic Magnetism Local HI 175deg 2 Pulsars >50deg 2 Neutral gas
26 Actions Update requirements and specifications Phasing MFAA -> AERAP -> SKA Engineering demonstrator Scientific demonstrator, AERA 3 Budget? AERAP1 proposal Cost of (scientific) demonstrators System comparison: Dishes versus AAs Compute power: beamforming, correlation, sensitivity SKA 2 vision MFAA All-hands meeting in Dwingeloo 1-3 April 2014
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