Electron Beam

Gold Compounds - Applications - Medicine
... In ultrathin sections of tissues viewed by electron microscopy, the immunogold labels appear as extremely dense round spots at the position of the antigen ... materials such as plastics and glass to be viewed in a scanning electron microscope ... drains electrical charge to earth, and its very high density provides stopping power for electrons in the electron beam, helping to limit the depth to which the electron beam penetrates the specimen ...

ALICE (accelerator) - Principle
... A DC photoelectron gun generates short low emittance electron bunches with the length of several ps and accelerates them to a modest 350keV ... The electron beam is then injected into the superconductive linac (booster), accelerated to the energy of 8.35MeV and transported to the main linac that ... The beam reaches the chicane after being turned by 180° in the first triple bend achromat ARC1 ...

Swiss Light Source
... Main component of the SLS is the 2.4 GeV electron storage ring of 288 m circumference The ring is formed by 36 dipole magnets of 1.4 tesla magnetic field, combined in 12 groups of three (triple ... quadrupole magnets (magnetic lenses) focuses the beam to provide an beam emittance of 5.5 nm rad. 73 horizontal and vertical beam steerers are used to continuously correct the position of the electron beam ...

Mass-to-charge Ratio - Charge-to-mass Ratio - The Electron
... The elementary charge-to-electron mass quotient, is a quantity in experimental physics ... It bears significance because the electron mass me is difficult to measure directly, and is instead derived from measurements of the elementary charge e and ... It also has historical significance the Q/m ratio of the electron was successfully calculated by J ...

Mott Scattering
... Coulomb scattering, is the separation of the two spin states of an electron beam by scattering the beam off the Coulomb field of heavy atoms ... It is mostly used to measure the spin polarization of an electron beam ... In lay terms, Mott Scattering is similar to Rutherford Scattering but electrons are used instead of Alpha particles as they have much lower mass (by about 4 ...