Archives for posts with tag: plasma

Editing footage for the video Belly of a Rock which will be shown on an old monitor encased in a sculptural hybrid form relating to both mollusc and rock. The giant sea slug of the mollusc family, can derive directional cues from the magnetic field of the earth which is then modified in response to the lunar cycle. It orients its body between north and east prior to a full moon. In the slug’s nervous system, four particular neurons are stimulated by changes in the applied magnetic field, and two are inhibited by such changes suggesting that the animal uses its magnetic sense continuously to help it travel in a straight line.

The Earth can be divided into the inner core, the outer core, the mantle, and the thin crust. The outer core is about 1,367 miles thick and mostly composed of liquid iron and nickel. It is very malleable and in a state of violent convection. The churning liquid metal of the outer core creates and sustains Earth’s magnetic field. At the boundary between the inner and outer core temperatures can reach 6,000° C which is as hot as the surface of the sun. The inner core is a dense ball of mostly iron, but with a temperature above the melting point of iron, it is not liquid or even molten. Intense pressure from the rest of the planet and its atmosphere prevents the iron inner core from melting as the iron atoms are unable to move into a liquid state. It could be described as a plasma behaving as a solid. The inner core rotates eastward, like the surface of the planet, but it’s a little faster, making an extra rotation about every 1,000 years.  Geoscientists think that the iron crystals in the inner core align north-south, along with Earth’s axis of rotation and magnetic field and are arranged in a hexagonal close-packed pattern. The orientation of the crystal structure means that seismic waves travel faster when going north-south than when going east-west. Seismic waves travel four seconds faster pole-to-pole than through the Equator. 

The Earth is still cooling and as it does so, bits of the liquid outer core solidify or crystallize causing the solid inner core to grow by about a millimetre every year. The growth is not uniform, it is influenced by activity in the mantle and is more concentrated around regions where tectonic plates are slipping from the lithosphere into the mantle, drawing heat from the core and cooling the surrounding area. The crystallization process is very slow, and further slowed by the constant radioactive decay of Earth’s interior. Scientists estimate it would take about 91 billion years for the core to completely solidify but the sun will burn out in just 5 billion years. 

I have nervously passed the cosmic ray detectors over to programmer Jamie. It was hard to let them out of my sight after so much work to get them built but he can’t test the code he has written without them. The Breath of Stars directly interacts with cosmic rays in real time to trigger a digital reaction via a mini computer attached to a block of plastic scintillator and a sensitive photomultiplier. As each particle strikes the plastic scintillator its energy is recorded and a starburst image video relative to the energy released is projected, with the largest images representing the particles with the highest energy.

I am constructing an Obelisk sculpture in response to the concrete obelisk erected in 1955 at Hartland Magnetic Observatory, near the site’s northern boundary as a permanent azimuth mark. It is viewed via a theodolite through a window in the north wall of the Absolute Hut, its azimuth being 11º27’54” E of N and marks the point from which the magnetic north pole is tracked as it drifts westwards. Layers of torn recycled paper are stacked like sedimentary rock that holds clues to the Earth’s magnetic field reversals in its strata.

Copper contours of magnetic field lines have been lacquered to preserve the heat patina from plasma gun cutting. These shapes will be pinned to the north facing mossy wall of the Absolute Hut installation, a reimagining of the Absolute Hut at Hartland Magnetic Observatory. I will also employ a north facing window from which to observe the azimuth mark of the Obelisk sculpture.

A second research visit to RSPB Snettisham, this time to see the pink footed geese (which over winter on the mudflats here) leave their roost at dawn to fly to the fields to feed.

The walk from the car park to the viewing area is over 2km and takes about half an hour to walk. Setting out before first light the weather felt promising but just as I erected the camera tripod the rain came down hard and didn’t stop for the rest of the morning.

Made a second attempt the next morning leaving a little earlier and although it remained dry there was heavy fog over the sea. Not great for filming with my very basic kit but very atmospheric to experience as the geese emerged from the sea mists.

The noise they make is incredible, a constant chattering building to a crescendo of honking calls as they rise from the water and swarm across the sky in their hundreds. They come in waves but look like particles. At one point what sounded like a few gunshots fired out across the bay in the distant darkness. This sudden disturbance set off a slow deep rumble which drew closer accompanied by a low dark cloud growing heavily stronger building and rising as a huge tidal wave of geese rose simultaneously into the sky in panicked disarray. Extraordinary to witness.

Birds are able to “see” Earth’s magnetic field lines and use that information for navigation. Their compass ability comes from a quantum effect in radical pairs, formed photochemically in the eyes. This light sensitive magnetic compass used by birds is affected by the polarisation direction of light. Exposure to blue light excites an electron, which causes the formation of a radical-pair whose electrons are quantum entangled, enabling the precision needed for magnetoreception.

In chemistry a radical is an unpaired electron which is can be highly chemically reactive. In the radical pair mechanism a pair of electrons with opposite spins have a chemical bond. Light can cause the electrons to change spin direction which can break the bond giving the electron a chance to react with other molecules. In magnetoreception two cryptochrome molecules, found in the rod cells in the eyes of birds, each with unpaired electrons, exist in states either with their spin axes in the same direction, or in opposite directions, oscillating rapidly between the two states. That oscillation is extremely sensitive and can detect the weak magnetic field of the Earth. Birds then move their heads to read the spin of the molecules and therefore detect the orientation of the magnetic field.

While in North Norfolk staying in a beach chalet away from light pollution I was able to make a couple of short time lapse videos centering on Polaris.

Birds can detect the slow arc of the sun and the rotation of the constellations across the sky which is imperceptible to humans and allows migrating birds to orient themselves using celestial navigation as well as magnetoreception.

Birds are also able to detect rapid movement such as individual flashes or flickering of a fluorescent light which humans see as a continuous light. Hawks which pursue other birds through dense forests at high speeds, follow the movement of their prey while avoiding branches and other obstacles. To humans travelling at this speed, the fleeing prey, branches and obstacles would just be a blur.

Gallery Visit

Thames-side Gallery ‘The Accurate Perception Available When Our Eye Becomes Single’ is an immersive multi-screen installation evoking the emotional specifics of place (Orford Ness on the Suffolk coast) while exploring the elasticity of time and history. It is an audio-visual collaboration between Richard Ducker (video) and Ian Thompson (sound) with no linear narrative; sound and image are not synchronised, so each viewing is a unique experience. Sarah Sparkes also makes an enigmatic performative appearance both in the video and live in the gallery.

The crashing sea on shingle, open spaces and brutalist bunker architecture of Orford Ness are echoed in the gallery with audio pitched to envelop and resonate but not overwhelm. Nicely done.

Listening

I really enjoy the Inside Science podcasts with Gaia Vince and this one interviewing cosmologist and theoretical physicist Laura Mersini-Houghton about finding evidence that supports her multiverse theory was particularly fascinating.

Multiverses, melting glaciers and what you can tell from the noise of someone peeing

According to Laura the single universe theory is mathematically impossible.

Reading

Merlin Sheldrake’s Entangled Life. A remarkable reveal of an other world, so different yet so entwined with our own. Beautifully clear analogies help to bridge an understanding between human and fungi.

The ability to detect and respond to chemicals is a primordial sensory ability.

In humans when a molecule lands on our olfactory epithelium and binds to a receptor it causes nerves to fire triggering thoughts and emotional responses.

A mycelial network is one large chemically sensitive membrane: a molecule can bind to a receptor anywhere on its surface and trigger a signalling cascade that alters fungal behaviour.

Fungal lives are lived in a flood of sensory information.

They have light receptors, are sensitive to touch and it also looks like fungi may form fantastically complex networks of electrically excitable cells – a potential ‘fungal computer’ using electrical signalling as a basis for rapid communication and decision making which could learn and remember.

Back in beautiful Northumberland for a Beyond gathering of artists at ACA who will be continuing in the open door residency as the project evolves into Continuum.

1810 ACA.jpg

Lots of particle trails were spotted during The Cloud Chamber Workshop. Thanks to the Institute of Physics for sponsoring this, Allenheads Contemporary Arts for hosting and the North Pennines Stargazing Festival for including it in their programme.

1810 cloud chamber workshop 1

A cloud chamber gives us a glimpse into the invisible world of particles produced in the radioactive decay of naturally occurring elements and those generated when cosmic rays strike the top of the Earth’s atmosphere.

1810 cloud chamber workshop 2

These particles pass though us continuously without our awareness. Witnessing this usually unseen activity can lead us to look beyond what our immediate senses tell us is there and consider the possibility of other intangible phenomena.

1810 Wilson's cloud chamber

The rather gorgeous original Cloud Chamber was invented by Scottish physicist Charles Wilson and he won the noble prize for it in 1927. It has been said that the cloud chamber might be the most important piece of experimental equipment in the history of particle physics. It was a chance discovery that made the study of particles possible.
Wilson was fascinated by clouds and was actually studying meteorology spending his time observing clouds at the top of Ben Nevis. He thought it might be easier to study them if he could build a device to create clouds in his laboratory. He also hoped to recreate the strange optical phenomena known as a Glory caused by light hitting clouds below the observer which he had experienced from his high vantage point on the mountain.

1810 A glory

It was Victor Hess who discovered cosmic rays and earnt the Nobel Prize for this in 1936. Scientists had been puzzled by the levels of ionizing radiation measured in the atmosphere using electroscopes. It was expected that radiation would decrease with distance from the earth but to test this Hess risked his life taking measurements at high altitudes in a balloon without oxygen tanks. He found that the radiation levels increased with altitude and concluded that there was radiation penetrating the atmosphere from outer space.

1810 Victor Hess balloon

Left over dry ice from the workshop gave us the opportunity to try freezing bubbles.

1810 freezing bubble

The workshop was followed by The Dark Side of the Universe talk from Dr. Pete Edwards. Our universe is filled with mysterious dark matter, whose gravity provides the cosmic glue that holds it all together, and dark energy, which is slowly tearing the universe apart.

1810 Pete Edwards Talk ACA

The finale of the Stargazing Festival was the screening of Steven Spielberg’s 1977 sci-fi icon Close Encounters of the Third Kind. Good to revisit and think about how much more we know about the universe 41 years on.

1810 Close Encounters

This was preceded by an appropriate dinner courtesy of Alan Smith.

1810 Close Encounters dinner

I was invited as a guest speaker at London LASER Labs Re- Thinking Space at Central Saint Martins.

The session remit was

We are in the midst of both an incredible and challenging space age. How can we harness the information, collected in silo, from the fields of cosmology and quantum physics to conceive of a more unified vision of how the universe (and us) are put together? Within science and culture – what new models of thought could we foster? How do creativity and consciousness fit into this emerging paradigm? How can we rethink our practices to swerve the impasse some are labelling a new ‘Dark Age’?…

I was glad to arrive early to see the collection of meteorites Dr Natasha Almeida, Curator of Meteorites at the Natural History Museum had brought along for the Playlab hands on session. This included a spectacular slice of iron meteorite. Due to a long cooling period inside the parent asteroids the nickel and iron alloys crystallise then when polished and acid etched the classic Widmanstätten patterns of intersecting lines of lamellar kamacite, are visible. Also a tear drop of earth rock created when a meteorite struck the earth and the heat melted the rock which flew into the air and cooled into tear drops as it fell.

1810 meteorite collection.jpg

Other speakers at the event were Dr. Thomas Kitching a Cosmologist from Mullard Space Science Laboratory who is Science Co-Lead for the ESA’s Euclid Mission launching in 2021 to map the geometry of the Dark Universe by observing thousands of millions of galaxies.

1810 terra incognita.jpg

He told us how confidence in what the universe is made of has eroded over the centuries and perhaps dark matter and dark energy which make up what we call the dark universe should be renamed Materia Incognita.

Dr Ceri Brenner is a plasma physicist and innovator at STFC Rutherford Appleton Laboratory’s Central Laser Facility. She uses the most powerful lasers in the world to study what happens when extreme bursts of light come into contact with matter. She told us how firing these high energy lasers  through Tantalum a rare, blue-gray lustrous metal can produce high energy x-rays which can be used for imaging the container walls of  radioactive storage facilities to look for damage. The extreme physics she studies can also be applied to understanding supernova explosions in space or how we can ignite a star on earth for clean electricity generation.

1810 STFC laser lab

Apparently plasma accounts for 99% of the known matter in the Universe, it’s a soup of sub-atomic particles at temperatures way beyond what we usually experience on earth. This makes the stuff we interact with on a daily basis seem a really tiny portion if 99% of the 5% we know is also stuff beyond our realm of experience.

1810 plasma.jpg

Astrophysicist Dr Chamkaur Ghag was also there to talk about direct dark matter research and how extremely sensitive the detectors need to be. It was interesting to look at the progression of the different detectors from DRIFT to LUX increasing target capacity and homing in on areas of possibility where the illusive particles might be found.

Cham always gives insight into the importance of not just interrogating matter but putting scientific research into context. Asking why we are doing something, not just how. This fires his passion to address climate change and his involvement in the grassroots initiative from Particle Physicists European Strategy Update on Climate Change

1810 Paradise burning

PARADISE burning — More than 30,000 people fled for their lives as a late-season wildfire swept across this town in the Sierra foothills

Laser Lab Talks Re-Thinking Space was compered by Nicola Triscott, founding Artistic Director/CEO of Arts Catalyst who asked the panel some reaching questions about the future of physics and how we make a difference to the debate placing ourselves in control of our destiny. Questions from the floor addressed the public interface of science. Speaking in front of an audience is not something I find comfortable so my input to the panel was slim but hopefully I had aired some relevant points during my talk looking at the opposing scales of cosmology and quantum physics and how we might relate to these two spheres of knowledge, both beyond human scale and comprehension.

1802 frozen galaxy
The idea of a new dark age approaching addresses a fear that we no longer understand the world around us. We are subjected to too much information that we can no longer process. There is too much complexity, we don’t know where to turn for verification.
The knowledge of the way the world behaves built up over generations may no longer apply. The fear that we are losing connection to the world around us is in many ways a long standing one – we have always looked back to a time when we believed we lived in harmony with the natural world.  That something central to our lives has been lost.

 

1810 Bruegel Two Monkeys

Pieter Bruegel The Elder Two Monkeys 1592

I have seen some interesting exhibitions tracing the human experience through alienation, projection and what happens when different worlds collide.

Nicky Coutts excellent examination of interspecies dissonance Man Stupid at Danielle Arnaud. Koko the gorilla was born and raised in captivity. She was taught to sign and ultimately deliver a message in the role of ambassador on behalf of nature to the 2015 Paris Climate Conference.

In Nicky’s drawings Koko has slipped away leaving just her skin as shadow.

1810 Nicky Coutts

The images read as an indecipherable code. The frustration at the divide between human and non human communication is held in these traces of gesture. We can look hard, make suggestions but will never know what is in the great ape’s mind. Drawn in blackest charcoal, rich and intense with a primeval, totemic aura they could be the props of the shaman hinting at another world that requires some rite of passage involving the returning to a world of raw visceral nature.

Oceania at The Royal Academy.

In 1768 James Cook set sail from Plymouth in the HMS Endeavour funded by the Royal Society to track the transit of Venus in Tahiti and explore the islands of the Pacific Ocean.

1810 Oceania RA Lisa Reihana 3.jpg

Lisa Reihana has created a large scale panaoramic video installation in Pursuit of Venus [infected] using the French scenic wallpaper Les Sauvages De La Mer Pacifique as a backdrop to the complexities of cultural identity and colonisation depicting scenes of encounter between Europeans and Polynesians.

1810 Oceania RA 3

Much of the exhibition was uncomfortable viewing for although the catalogue emphasises that objects collected by Europeans were frequently given willingly I don’t feel confident there was equality in these ‘exchanges’.

1810 Oceania RA 5

1810 Oceania RA 7

1810 Oceania RA 1

That the objects still resonate with spiritual significance for some is evident by fresh offerings left around the galleries.

I had just finished reading the riveting Modern Gods by Nick Laird before visiting which raises the subject of proselytism and relevant contemporary issues on religious belief and cultural contamination drawing on events in Ulster and Papua New Guinea to highlight the fragility of social cohesion when faith and tribe are on the line.

 

Sarah Christie’s Library shown at Southwark Cathedral is an ongoing attempt to give voice to the individuals that make up the 48% and the opposing 52% trying to make sense of the divided society they find themselves a part of in post Brexit referendum Britain.

1810 Sarah Christie

In Ancient Greece, people voted by writing on ‘ostraca’ a broken piece of pottery. The public have been invited to select an ostracon – sherds made by hand from a hundred and fifty cast bowls – and offer their own words that break boundaries.

I enjoyed Alex Prager’s Face in the Crowd series at The Photographers Gallery.

1810 Alex Prager Face in the Crowd

The individual is picked out in the crowd and elevated from anonymity, but look at the crowd – these are not the grey masses we blend in with on the streets, at airport lounges and theatres. Each of these characters is chosen, placed and choreographed. The unnatural vibrancy and controlled demeanours give the scene an unsettling automaton quality.

1810 Alex Prager

Entertained by an evening exploring the darker past of the gothic extravaganza Strawberry Hill House.

Spirits invoked for Ghost Tide exhibition at Thames-side Gallery curated by Sarah Sparkes and Monica Bobinska.

1810 Laura Marker Ghost Tide

Laura Marker

1810 Mary Yacoob Ghost Tide

Mary Yacoob

I took part in the Hollow Bone Ceremony led by shaman Kate Walters who uses repetitive drumming to alter the brain waves to ‘theta’ waves to allow travel to either the Upper world or the Lower world to convene with the cosmos, nature and animal spirits and ask for guidance on behalf of the participant.

1810 hollow bone ceremony

Was it coincidence that my mind focused on an unexpected encounter with a deer in Grizedale Forest the previous week that after the 10 minutes of rhythmic trance Kate came back with a strong image of a large Moose or Stag whose energy and ferocity I needed to tap into.

1815 Grizedale Deer.jpg

Thanks to Jim Lloyd for highlighting this quote from Werner Heisenberg

“What we observe is not nature itself, but nature exposed to our method of questioning. “