Turbulence on demand

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Sep 21, 2005 - Central supercomputer ... 11. LOFAR Initial Test Station (ITS) at Exloo .... Courtesy and © M. J. Padgett, J. Leach et al., U. Glasgow, UK; Royal ...

Physics in Space Programme

LOFAR Outrigger in Scandinavia

LOFAR and LOIS www.lois-space.net Deep space probing at the longest wavelengths for solar physics and space weather Bo Thidé Swedish Institute of Space Physics, Uppsala and Dept. of Astronomy and Space Physics, Uppsala University and LOIS Space Centre, Växjö University Solar Activity Workshop, Lund, 19-21 Sep, 2005

New HF-VHF digital radio system for space physics LOFAR Low Frequency Array (10– 240 MHz) Test station at Exloo operational 2004, full scale deployment in progress. Final antenna 10–100 times more sensitive than any existing comparable facility

LOIS LOFAR In Scandinavia Test station near Växjö operational 2004, fast fibre network, supercomputer 2005 Transmitter in Hörby (Teracom) Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

Hydrogen radiates at 1420.4 MHz (21 cm) Very important source of radiation from space

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

The Westerbork array of 14 dishes, each 25 m in diameter sees nearby 1420.4 MHz (21 cm) objects

M31 (Andromeda, Local group)

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

Q1: How to observe 21 cm line radio emission from the Epoch of Re-Ionisation?

M. Rees Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

The cosmological redshift (z~8-10) Doppler shifts the 1420.4 MHz signal into the HF/VHF band!

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

LOFAR

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

LOFAR will be a very sensitive HF/VHF array

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

LOFAR Phase 1

Central supercomputer

- Radio telescope - Seismic imager - Precision weather for agriculture, wind energy

Fibre data transport Sensor field

Integrate LOFAR network into regional fibre network, sharing costs with schools, health centres etc.

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

LOFAR Initial Test Station (ITS) at Exloo

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

First LOFAR ITS results

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

LOFAR Phase 2 into Lower Saxony, Schleswig-Holstein, Nordrhein-Westfalen

Ultimate LOFAR to Växjö SE Cambridge UK Potsdam DE Nançay FR etc

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

LOIS – The LOFAR Outrigger in Scandinavia

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

Three orthogonal linear dipole antennas probe the 3D electric field vectors

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

Three orthogonal loop antennas probe the 3D magnetic field pseudovectors

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

LOIS Test Station control room (Risinge)

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

LOIS resources Supercomputer cluster (SUR grant from IBM) and Part of the LOIS Test Station outside Växjö, SE.

Lars Daldorff, Axel Guthmann and the IBM system

B.T. and Willem Baan (LOFAR) at the LOIS Test Station.

Bo Thidé

Solar Activity Workshop, Lund 19-21 Sep, 2005

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Solar Activity Workshop, Lund 19-21 Sep, 2005

LOIS and LOFAR

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

LOIS transmission tests Test transmissions (ionospheric interactions, space radar) will be made with Radio Sweden’s 500kW HF transmitters and logperiodic antennas at Hörby, 200 km south of the LOIS test station. Will try to include other highpower HF transmitters in Europe.

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Solar Activity Workshop, Lund 19-21 Sep, 2005

From Paul Rodriguez

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

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Solar Activity Workshop, Lund 19-21 Sep, 2005

From Paul Rodriguez

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Solar Activity Workshop, Lund 19-21 Sep, 2005

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

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Solar Activity Workshop, Lund 19-21 Sep, 2005

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Solar Activity Workshop, Lund 19-21 Sep, 2005

From Paul Rodriguez

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Solar Activity Workshop, Lund 19-21 Sep, 2005

Solar Phys., in press

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

3D vector polarimetry and radio imaging

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

3D polarimetry utilising that E(t,x) is a polar vector and B(t,x) an axial vector (pseudovector)

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

Use EM field symmetries and conserved quantities (Noether’s theorem)

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

EM symmetries (continued)

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

EM symmetries (continued)

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

EM beam with spin (circular polarisation) No orbital angular momentum (OAM)

Courtesy and © M. J. Padgett, J. Leach et al., U. Glasgow, UK; Royal Society Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

Field vectors across an antenna array for a radio beam with spin (circular polarisation)

Phase 0 deg

Phase 45 deg B. T. et al., preprint, 2005

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

Helical radio beams carry orbital angular momentum (OAM)

B. Thidé et al., preprint, 2005 Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

Field vectors across an antenna array for a radio beam with orbital angular momentum

Phase 45 deg

Phase 0 deg B. Thidé et al., preprint, 2005 Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

EM beams with orbital angular momentum (OAM) l=+1

l=+3

l= -4

Courtesy and © M. J. Padgett, J. Leach et al., U. Glasgow, UK; Royal Society Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

OAM as turbulence diagnostic

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

OAM as a new RF modulation technique?

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

Cosmic ray radio flash candidates at LOIS (Dec 2004)

Latest news: 27 Dec, 2004, magnetar gamma signatures tentatively observed.

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

Bo Thidé

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Solar Activity Workshop, Lund 19-21 Sep, 2005

Ultra-High Energy Neutrino Detection on the Moon Oscar Stål J. Bergman, L Åhlén, B. Thidé1 Swedish Institute of Space Physics IRF-U, Uppsala, Sweden 1

also at LOIS Space Centre Växjö, Sweden

DGLR International Symposium To Moon and Beyond Sept. 15-16, 2005 Bremen, Germany Preprint available online: astro-ph/0509210 Bo Thidé

To Moon and Beyond

Solar Activity Workshop, Lund 19-21 Sep, 2005

Oscar Stål

Bremen, sept. 15-16, 2005

LOFAR and LOIS sensors—a summary Sensor type

Applications

HF-antenna:

astrophysics, ionospheric/magnetospheric physics, astro-particle physics cosmology, early Universe solar effects on Earth, space weather ground subsidence micro-climate prediction gas/oil extraction precision agriculture wind energy precision agriculture habitat management public safety

VHF-antenna: Geophones: Weather:

Water:

Infra-sound: Bo Thidé

LOFAR was conceived by the astrophysics community as a new way to build radio telescopes

atmospheric turbulence, meteors, explosions, sonic booms 49

Solar Activity Workshop, Lund 19-21 Sep, 2005