Skip to main content

If this is it...

100 Years of Superconductivity, Professor James Annett
BRLSI (IOP South West Branch) 6th May 2011

Prof Annett graduated from Cambridge and completed post doctorate studies in Illinois before moving to Bristol in 1994 as a lecturer.

1897   JJ Thompson discovered electron
1900   Mark Plank quantum physics
1905   Albert Einstein and the photo-electric effect, special relativity and Brownian motion
1908   H Kamerlingh Onnes liquefied helium at 3 degrees Kelvin
1987   James Dewar liquefied hydrogen

Superconductors expel ALL the magnetic field, they are perfect diamagnets.

BCS Theory solved in 1956 which explains such things as ‘coherent states’.
Þ    Electron-lattice attraction near Fermi momentum (Energy level)
Þ    Leads to Cooper Pairs of electrons
Þ    Near band gap energy (The conduction band electrons are all paired up)

‘Gauge symmetry’:
Ø  Not as would be expected from nature
Ø  Nature NOT symmetrical (!?!)
o   Leads to theorized Higgs boson

1986 the Tc (critical temperature for superconductivity) first breached the theorized limit of 30K from BCS theory (new types of superconductor invented).

[Random thought: Bionic implant for the eye to assist in eye focussing.]

Binding energy for superconductors attached to magnets
Ø  (There are three different mechanisms depending on type of superconductor.)
o   doping diagram of superconductivity being affected by alloy being doped

Uses of superconductors in the current world:
·      Superconducting power grid
o   High density of current
o   REAL TECHNOLOGY
·      Superconducting motors
·      Computing

What to expect?
·      Possibly reach room temperature superconducting

[Random thought: People must intimidate each other for having good eye-sight in the West generally but this trend is now being reversed and it can be seen that people wearing glasses are now facing the threat of violence for being short-sighted]

The optical properties of superconductors are mainly in the infrared so far (via interaction with Cooper pairs of electrons for bullshit example).

·      Possible application in bionic eye implant as a focussing sensor for the eye.

Comments

Post a Comment

Popular posts from this blog

Effective Altruism

It’s not quite Aldous Huxley or George Orwell. I think altruism is what the Dalai Lama perhaps aspires to; kindness, clarity and compassion. This is about humanity rather than about more abstract terms such as the value of money as a metric for happiness or altruism. When dealing with diagnostic labels in mental health, you have to decide whether money is in fact a factor is such a diagnosis or not, given your politics on what money is. Therefore, mental health should be more of a framework that enables those who chose to give up their freedom to live a healthy life, in safety and security within the system. People seek opportunity, therefore by providing such a framework and a decent introduction to a healthy life free of unhappiness is essential to providing a service that is altruistic. We can see this from the British government’s model of social care and welfare programmes, which have proven resilient to mass immigration, a changing demographic, leading to the disruption in
Post a Comment
Read more

Brexit debate, should Britain leave the EU for the sake of ECHR?

I think the problem with this type of communication is that it relies on the out crowd being popular when in fact I felt convinced to vote to leave to EU because "they don't get it" and that is called abuse in Bristol and could get you arrested. Most Europeans have a poor education compared to the leading British schools as a result of their limited capacity to live well meaning that it is a technical form of slavery if they succeed in any way when someone from a more privileged backgrounds competes with them if the competition is not fair and equal. For example when it comes to sexual relations with their women. In sports referees have to enforce the rules of the game as well as the relative standing of the different teams in order for there to be a fair competition. Unfortunately, in Europe this does not happen so we should leave, but in the interests of world peace and investing in the future we should stay in the EU as it will get better for
Post a Comment
Read more

Notes from Energy & Utility Forum 2017

1. Robert Symons, CEO of Western Power Distribution said: “Energy demand could rise by 100% by 2030. Smart grids will be needed to manage electric vehicle charging so that the usage does not exceed the supply capacity at any time during the day.” 2. Spoke to Harry Vickers, Business Development Manager of Camborne Energy Storage, Camborne Capital at the Energy and Utility Forum in London on October 23rd 2017. He told me his company is working with Elon Musk to bring Tesla battery grid storage solutions to the UK. 3. Spoke to Sally Barrett-Williams, Chairman of Energy and Utility Forum on October 23rd, who said subsidies for solar projects had ended and her company’s focus has shifted to energy storage schemes. 4. Spoke to Simon Dowland, PhD, at 13:00 on Sunday 29th October, Simon is now working up in Cambridge at the Cavendish Physics Laboratory at the University of Cambridge, he is working in industry for the company Eight19 Ltd a spin off from a research project to bring ne
Post a Comment
Read more