Electron cooling

Electron cooling

Electron cooling is a process to shrink the size, divergence, and energy spread of charged particle beams without removing particles from the beam. Since the number of particles remains unchanged and the space coordinates and their derivatives (angles) are reduced, this means that the phase space occupied by the stored particles is compressed. It is equivalent to reducing the temperature of the beam. See also stochastic cooling.

It was invented by G.I. Budker (INP, Novosibirsk) in 1966 as a way to increase luminosity of hadron colliders. It was first tested in 1974 with 68 MeV protons at NAP-M storage ring at INP.

Basically, electron cooling works as follows:
* The velocity of the electrons is made equal to the average velocity of the ions.
* The ions undergo Coulomb scattering in the electron “gas” and lose energy, which is transferred from the ions to the co-streaming electrons until some thermal equilibrium is attained.

References

* The Fermilab [http://www-ecool.fnal.gov/ | Electron Cooling Project]


Wikimedia Foundation. 2010.

См. также в других словарях:

  • electron cooling — elektroninis aušinimas statusas T sritis radioelektronika atitikmenys: angl. electron cooling vok. elektronische Kühlung, f rus. электронное охлаждение, n pranc. refroidissement électronique, m …   Radioelektronikos terminų žodynas

  • Electron microscope — Diagram of a transmission electron microscope A 197 …   Wikipedia

  • Electron-multiplying CCD — An electron multiplying CCD (EMCCD, also known as an L3Vision CCD, L3CCD or Impactron CCD) is a charge coupled device in which a gain register is placed between the shift register and the output amplifier. The gain register is split up into a… …   Wikipedia

  • Electron — For other uses, see Electron (disambiguation). Electron Experiments with a Crookes tube first demonstrated the particle nature of electrons. In this illustration, the profile of the cross shaped target is projected against the tube face at right… …   Wikipedia

  • Particle beam cooling — To be developed as a jump page related to particle accelerators Cooling techniques are important for the control the emittance of particle beams in particle accelerators. Usually, these techniques take advantage, in some way, of the electric or… …   Wikipedia

  • Doppler cooling — is a mechanism that can be used to trap and cool atoms. The term is sometimes used synonymously with laser cooling, though laser cooling includes other techniques. Contents 1 History 2 Brief Explanation 3 Detailed Explanation …   Wikipedia

  • Stochastic cooling — is a form of particle beam cooling. It is used in some particle accelerators and storage rings to control the emittance of the particle beams in the machine. This process uses the electrical signals that the individual charged particles generate… …   Wikipedia

  • International Muon Ionization Cooling Experiment — The International Muon Ionization Cooling Experiment (or MICE) is a high energy physics experiment dedicated to observing ionization cooling of muons for the first time. This is a process where by the beam emittance of a beam is reduced in order… …   Wikipedia

  • Low-energy electron microscopy — Low energy electron microscopy, or LEEM, is a technique used by surface scientists to study surface structure at mesoscopic scale on conducting and semiconducting materials. It is based on imaging the electrons elastically scattered from the… …   Wikipedia

  • Thermotunnel cooling — is similar to thermionic emission cooling in that fast moving electrons carry heat across a gap but cannot return due to a voltage difference. The problem with using thermal electrons to carry heat is the fact that, due to the high work function… …   Wikipedia


Поделиться ссылкой на выделенное

Прямая ссылка:
Нажмите правой клавишей мыши и выберите «Копировать ссылку»