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SKADS White Paper - Technologies -. Andrew Faulkner. http://webmail.jb.man.ac.uk/skadswiki/SkadsWhitePaper. What is it........?. SKADS. SKA Intl. Existing Knowledge. Developments. Science. History. Deliverables. Precursors. Current Telescopes. Demonstrators. Requirements. Other work.

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Skads white paper technologies

SKADS White Paper- Technologies -

Andrew Faulkner

http://webmail.jb.man.ac.uk/skadswiki/SkadsWhitePaper


What is it

What is it........?

SKADS

SKA Intl.

Existing Knowledge

Developments

Science

History

Deliverables

Precursors

Current Telescopes

Demonstrators

Requirements

Other work

SKADS White Paper

Our ‘Final’ Deliverable


System group ds8

System Group – DS8

Preparing principal deliverable of SKADS – The White Paper

Members:

Andrew Faulkner (Chair)Peter Wilkinson

Steve TorchinskyArnold van Ardenne

Andre van EsPaul Alexander

Dion KantStelio Montebugnoli

Mike JonesSteve Rawlings

Rosie Bolton Philippe Picard

Jan Geralt bij de VaateKobus Cloete


Aperture arrays for the ska the skads white paper

Abstract

Executive Summary

Introduction

International context

Scientific Requirements

AA science opportunity

Specification Overview

SKADS design

Design architecture

Overall costs

Cost Scaling

Power usage

Operational aspects

Technology readiness

TRL

Technology roadmap

Design and costing methodology & tools

Design Block descriptions

Cost tool

Demonstrators & Results

EMBRACE

2-PAD

BEST

Design trade-offs

Summary detailed results

Analysis of results

Implementation Strategy

Manufacturability of Aperture Arrays

Maintainability

Configuration and RFI

Reliability

Risk mitigation

Upgradeability

From SKADS to SKA

PrepSKA

SKA Phase 1

SKA Phase 2

References

Appendices

Aperture Arrays for the SKA: the SKADS White Paper


Aperture arrays for the ska the skads white paper1

Abstract

Executive Summary

Introduction

International context

Scientific Requirements

AA science opportunity

Specification Overview

SKADS design

Design architecture

Overall costs

Cost Scaling

Power usage

Operational aspects

Technology readiness

TRL

Technology roadmap

Design and costing methodology & tools

Design Block descriptions

Cost tool

Demonstrators & Results

EMBRACE

2-PAD

BEST

Design trade-offs

Summary detailed results

Analysis of results

Implementation Strategy

Manufacturability of Aperture Arrays

Maintainability

Configuration and RFI

Reliability

Risk mitigation

Upgradeability

From SKADS to SKA

PrepSKA

SKA Phase 1

SKA Phase 2

References

Appendices

Aperture Arrays for the SKA: the SKADS White Paper


This is a big job

This is a big job.....

  • Meetings, Telecoms with schedules produced

  • A draft is in progress: on the Wiki

  • Some contributions from the various authors have been received

  • A draft was planned to be circulated at the Conference

  • We are running late.....

    It must be produced before end of Year


Science requirements

Science Requirements....

The Design Reference mission

http://www.skatelescope.org/PDF/091001_DRM_v0.4.pdf


Skads white paper technologies

39,000 5. Wide Field Polarimetry - 2

25,0000 3. Protoplanetary disks

Huge....

20,0000 6. Continuum deep field

15,000

Sensitivity

Requirements

12,500

Sensitivity Aeff/Tsysm2 K−1

7. Deep HI Field

8. HI EoR

10,000

10b, 13b. Pulsar timing

12. HI BAO

7,500

Proposed

AA system

envelope

Proposed

Dish Envelope

3,000 @ 15m

10a, 13a. Pulsar search

5,000

2,500

5. Wide Field Polarimetry - 1

4. Cosmic Magnetism

9. Galactic centre pulsars

11. Galaxy Evolution via H I Absorption

2. Resolving AGN and Star Formation in Galaxies

0

0.1

0.14

0.3

1.0

1.4

3.0

10.0

Frequency GHz

Specified sensitivity

Derived survey speed


Skads white paper technologies

Survey Speed

Requirements

7. Deep HI Field

12. HI BAO

1e10

13a. Pulsar search

5. Wide Field Polarimetry

3. Protoplanetary disks

11. Galaxy Ev. via HI Abs’n

1e8

4. Cosmic

Magnetism

8. HI EoR

6. Continuum deep field

1e6

2. Resolving AGN and Star Formation in Galaxies

9. Galactic centre pulsars

Survey Speed m4 K−2 deg2

10b, 13b. Pulsar timing

1e4

1e2

Proposed

Dish Envelope

3,000 @ 15m

Proposed

AA system

envelope

1e1

0.1

0.14

0.3

1.0

1.4

3.0

10.0

Frequency GHz

Specified survey speed

Derived from sensitivity


Skads white paper technologies

>3000 2. Resolving AGN and Star Formation in Galaxies

1,000

Baseline

Requirements

6. Continuum deep field

300

11. Galaxy Evolution via HI Absorption

3. Protoplanetary disks

Baseline length, km

100

7. Deep HI Field

4. Cosmic Magnetism

30

8. HI EoR

5. Wide Field Polarimetry

10

12. HI BAO

3

10a, 13a. Pulsar search

9. Galactic centre pulsars

10b, 13b. Pulsar timing

1

0.1

0.14

0.3

1.0

1.4

3.0

10.0

Frequency GHz

Stated in RSP

Unstated in RSP - assumed


Ska overall structure

SKA Overall Structure

Beam Data

Mass Storage

0.3-1.2 GHz

Wide FoV

Tile &

Station

Processing

Central Processing Facility - CPF

To 250 AA Stations

Dense AA

...

Correlator – AA & Dish

16 Tb/s

...

Data

..

70-450 MHz

Wide FoV

..

Time

Post Processor

Control

Sparse AA

...

0.8-10 GHz

Single

Pixel or

Focal plane

array

DSP

Control Processors

& User interface

12-15m

Dishes

80 Gb/s

DSP

Time

Standard

...

To 2400 Dishes

User interface

via Internet


Ska common framework

SKA Common Framework

70 300 700 2 5 10

MHz MHz MHz GHz GHz GHz

10

km

180

km

3000+

km

PAF

AA-Hi

AA-Lo

WBSPF

Optimisation of technology boundaries will take place based on science performance and cost

Time axis not shown


Modelling design and costing tool

Modelling: Design and Costing Tool

Also tracks Power & data rate


D c 2 ska breakdown

D&C-2 SKA Breakdown

Collectors

250 x 57m dia AA-hi

250x220m dia AA-lo

2400 x 15m dishes

Wideband SPFeeds

Costs not Included:

Development work

Non-recoverable expenses

Civil works

Power installation

Operational Costs

Project Management

~€1.48Bn

SKA Memos: 111 and 93 for D&C-1


Aa hi arrays not inc station proc

AA-hi Arrays (not inc. station proc.)

Infrastructure:

Cover membrane

Steels for Antenna Support Structure

Cable Support Poles

Velcro Cable Ties

Foundations: building poles

Civil Engineering

Cooling

Power Supplies

Racking

Trenches

Infrastructure Build – 3 man years

Bunkers

~€1.5M each array, NPV

Analogue Data Transport:

Connection to PCBs = no. of cables

Preparation of cables

Cable - total length reqd per station

Male plugs

PCB Outlet plugs (i.e. PCB inputs to first processor)

Install cables in field

~€11 each element, 2011


Scenarios planning

Scenarios planning

SKADS PrepSKA Phase 1 Phase 2

A major input to the Concept Design Reviews: CoDR


The messages are

The messages are:

  • AAs can be achieved at acceptable cost and power for the SKA

  • AAs can be tailored to meet SKA science requirements <1.4GHz

  • AAs make the SKA central processing tractable & affordable

  • There is a solid basis of engineering for AA development

  • AAs are capable of achieving SKA performance requirements

An SKA scenario including AAs is the only way of meeting the science goals


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