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Nina Nadine Ridder

Going solid-state could make batteries safer and longer-lasting - 3 views

phys.org/...ries-safer-longer-lasting.html

technology solid_state_physics PHY energy

shared by Nina Nadine Ridder on 18 Aug 15 - No Cached
Thijs Versloot and jcunha liked it
  • Nina Nadine Ridder on 18 Aug 15
     
    If you pry open one of today's ubiquitous high-tech devices-whether a cellphone, a laptop, or an electric car-you'll find that batteries take up most of the space inside. Indeed, the recent evolution of batteries has made it possible to pack ample power in small places.
  • Thijs Versloot on 18 Aug 15
     
    solidstate batteries would be perfect indeed, but up to now I know of no solid electrolyte that can do the trick. The article itself does not mention any material beyond superionic lithium-ion conductors, but does not specify which one in particular. The premis seems to be "if it conducts fast enough, the battery can conduct efficiently"
pacome delva

The Coolest Antiprotons - 2 views

focus.aps.org/st1

phy antiprotons antihydrogen

shared by pacome delva on 05 Jul 10 - Cached
  • Researchers cooled a cloud of about 4,000 antiprotons down to 9 kelvin using a standard approach for cooling atoms that has never been used with charged particles or ions. The technique could provide a new way to create and trap antihydrogen, which could help researchers probe a basic symmetry of nature.
  • hydrogen and antihydrogen should share many basic traits, like mass, magnetic moment, and emission spectrum. If antihydrogen and hydrogen have even slightly different spectra, it indicates some new physics principles beyond the standard model, a very big deal.
  • pacome delva on 05 Jul 10
     
    antihydrogen propulsion...?
  • ...1 more comment...
  • LeopoldS on 05 Jul 10
     
    how to efficiently direct it?
  • Nicholas Lan on 06 Jul 10
     
    didn't roger write an assessment of antimatter propulsion when he was in the ACT?
  • pacome delva on 06 Jul 10
     
    yeah the problem is the amount of antimatter you can get and more specifically how to trap it. I found that you would need around one gram to go to the outer Solar System. So we are far from that, but finding an efficient way to trap it, with an electromagnetic trap rather than solid walls is a first step !
pacome delva

New optical clock breaks accuracy record - 2 views

physicsworld.com/...41696

phy optical_clocks

shared by pacome delva on 15 Feb 10 - Cached
  • A new optical clock that is twice as accurate as any other has been unveiled by physicists in the US. The clock, which is based on a single aluminium ion, could remain accurate to within one second over 3.7 billion years.
  • pacome delva on 15 Feb 10
     
    The accuracy of these new clocks is insane. Hope there will be soon some of these in space :)
pacome delva

Randomness is no lottery thanks to entangled ions - 0 views

physicsworld.com/...42310

phy quantum_cryptography quantum_entanglement

shared by pacome delva on 15 Apr 10 - Cached
  • An international team of physicists has created the first system that can produce verifiably random numbers. The technique relies on the inherent uncertainties in quantum mechanics and future versions could help cryptographers to encode information more securely than ever before.
Joris _

Ion trap quantum computing - 0 views

www.physorg.com/news161348276.html

shared by Joris _ on 14 May 09 - Cached
  • One of the most important considerations in quantum computing is the fact that quantum computing scales polynomially, rather than exponentially, as classical computing does
  • his process would allow us to take problems of great complexity and still solve them on a humanly possible timescale. This could provide the key to modeling complex systems - especially perhaps in biology - that we can’t solve now. This would be a tremendous advantage over classical computing.
  • Joris _ on 14 May 09
     
    a follow-up question: Can quantum computer be efficient for global optimisation ?
pacome delva

Heaviest ever antimatter discovered - physicsworld.com - 1 views

physicsworld.com/...45544

phy antimatter

shared by pacome delva on 29 Mar 11 - No Cached
LeopoldS liked it
  • Physicists at the Relativistic Heavy Ion Collider (RHIC) in New York say they have created nuclei of antihelium-4 for the first time – the heaviest antimatter particles ever seen on Earth.
LeopoldS

Cellular and Network Contributions to Vestibular Signal Processing: Impact of Ion Condu... - 3 views

www.jneurosci.org/...8359.abstract

PHY AI bio technology

shared by LeopoldS on 25 Jun 11 - No Cached
  • LeopoldS on 25 Jun 11
     
    looks like very nice research - can we implement a technique inspired by this on a landing spacecraft?
Christophe Praz

Mars Spacecraft Reveal Comet Flyby Effects on Martian Atmosphere - 1 views

www.jpl.nasa.gov/...news.php

Mars atmosphere PHY

shared by Christophe Praz on 17 Nov 14 - No Cached
  • Christophe Praz on 17 Nov 14
     
    NASA and ESA spacecraft have gathered new information about the basic properties of the comet's nucleus (not 67p) and directly detected the effects on the Martian atmosphere. Dust from the comet impacted Mars and was vaporized high in the atmosphere, producing what was likely an impressive meteor shower. Eight different types of metal ions have been detected, including sodium, magnesium and iron. The satellites will now continue to look for long-term perturbations to Mars' atmosphere.
Thijs Versloot

Engineering three-dimensional hybrid supercapacitors for high-performance integrated en... - 3 views

www.pnas.org/...1420398112

technology energy batteries

shared by Thijs Versloot on 02 Apr 15 - No Cached
jcunha liked it
  • Thijs Versloot on 02 Apr 15
     
    Stacking laser printed supercapacitors (no clean room required btw) has lead to about 1100F/g and thus about 20-40Wh/L. For supercapacitors thats pretty damn good. For reference, Li-ion recently reached 650Wh/L. The gap is closing, although for supercaps of this type the theoretical maximum is 1400F/g.
jaihobah

Demonstrating a new technology for space debris removal using a bi-directional plasma t... - 2 views

www.nature.com/...s41598-018-32697-4

space PHY

shared by jaihobah on 01 Oct 18 - No Cached
  • jaihobah on 01 Oct 18
     
    Some people answering the question 'What's cooler than blasting space debris with lasers...?'.
  • Marcus Maertens on 03 Oct 18
     
    If it fires in both directions, can we align it such that it deorbits two debris with one shot?
  • Dario Izzo on 05 Oct 18
     
    :) the idea of having this method for debris removal is actually an ACT one from Claudio Bombardelli (ACT RF in MAD https://en.wikipedia.org/wiki/Ion-beam_shepherd). This is just a technological device to implement it so that the system on board is simplified (i.e. instead of two engines, you get away with one and a weird nozzle) Marcus, you cannot align it to get rid of two debris as you need to keep the spacecraft close to the debris as this is a long duration acion. One of the two would drift away (can only follow one!)
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