Affichage de 3353 résultats

About 16 000 Micro Strip Gas Chambers like this one will be used in the CMS tracking detector. They will measure the tracks of charged particles to a hundredth of a millimetre precision in the region near the collision point where the density of particles is very high. Each chamber is filled with a gas mixture of argon and dimethyl ether. Charged particles passing through ionise the gas, knocking out electrons which are collected on the aluminium strips visible under the microscope. Such detectors are being used in radiography. They give higher resolution imaging and reduce the required dose of radiation.

Part of the IBM computer that was used for physics simulations in preparation for experiments at LEP. When installed in 1985, it was considered to be very powerful. Nowadays, a PC can outperform it by a factor of ten.

Empire scientific corporation. U.S.A. Série 3432

Hewlett Packard. 419A

Farmer sub-standard X-ray dosemeter Mk2.

Rhodes Schwarz variable attenuator.Controls the strength of the current produced.

In detectors, light guides like this one are used to carry signals to the electronics for recording.

The 3.70 metre Big European Bubble Chamber (BEBC) was dismantled on 9 August 1984. One of the biggest detectors in the world, it produced direct visual recording of particle tracks. 6.3 million photos of interactions were taken with the chamber in the course of its existence.

The first ever circular particle accelerator, a cyclotron, was just a few centimetres in diameter. Invented in 1930 by Ernest Lawrence, it was the fore-runner of today's huge machines.

Antiproton target used for the AA (antiproton accumulator). Making an antiproton beam took a lot of time and effort. Firstly, protons were accelerated to an energy of 26 GeV in the PS and ejected onto a metal target. From the spray of emerging particles, a magnetic horn picked out 3.6 GeV antiprotons for injection into the AA through a wide-aperture focusing quadrupole magnet. For a million protons hitting the target, just one antiproton was captured, 'cooled' and accumulated. It took 3 days to make a beam of 3 x 10^11 - three hundred thousand million - antiprotons.