what is Electron beam ?
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It’s a beam of electron accelerated in a particular direction.\nIf we have a filament connected to a -ve potential. Opposite to this an anode is placed at high +ve potential. The electrons ejected from the filament are accelerated towards the anode. Beam can be narrowed by keeping slits of +ve potential along its path. \n\nThese electron beams have many usages.\n1. used in Television (Picture tube)\n2. Used to produce X-rays by allowing to hit on a tungsten target\n3. used in the food processing.
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You are referring to particle physics. In particle physics experiments beam of particles are accelerated and made to collide with a target, either another particle beam or a fixed target. Particle detectors around the collission point detect the debris of the collision which permits to deduce what happened.\n\nThe energy of these beams are usually given in units like GeV (giga electron volt) or MeV (mega electron volt). 1 MeV is the energy of a beam accelerated by a potential difference of 1 million volt. 1 GeV is 1000 times more.\n\nIntermediate energy refers to the energy of the particle beam. It is a somwhat subjective term.  High energy beams would be beams \nwith above 10 GeV. Low energy below 10 MeV. Intermediate energy everything in between.\n\nA scintillator detector is a type of particle detector. A particle traversing a scintillator counter will ionise the material and produce light usually in the blue and green regions. The photons are detected by photo amplifiers and transformed into an electrical signal. \n\nThe source leads to an introduction to particle physics.
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electron is Negatively charged particle that revolves around the nucleus of an atom.IT shows dual character i.e; it has both wave character and particle character...one electronic charge is 1.609 * 10^-19......the wave length of an electron can be found using the formula lamda= h/mv..where h is the plank's constant 6.626*10^-34...m is mass of an electron 9.1*10^-31...v is its velocity...when supplied energy it gets excited and moves to high enegry orbital...then slowly radiate the energy and then move to their position...these radiations araethe colours seen when we heat substances...the color is due the wavelength of the radiations....the energy of an electron at infinity is 0...when it is near the nuclues...it does some work and energy is spent therefore near the nucleus he charge of an electron is -ve...thats all i can  remember...hope you slect mine...thanks....
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Electronic engineering (sometimes synonymous with Electrical engineering) is a professional engineering discipline that deals with the emission, behavior, and effects of electrons (as in electron tubes and transistors) and with electronic devices, systems or equipment.
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A laser (from the acronym Light Amplification by Stimulated Emission of Radiation) is an optical source that emits photons in a coherent beam. The verb to lase means "to produce coherent light" or possibly "to cut or otherwise treat with coherent light", and is a back-formation of the term laser.\n\nLaser light is typically near-monochromatic, i.e. consisting of a single wavelength or color, and emitted in a narrow beam. This is in contrast to common light sources, such as the incandescent light bulb, which emit incoherent photons in almost all directions, usually over a wide spectrum of wavelengths.
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The Cathode Ray Tube\nAlmost all TVs in use today rely on a device known as the cathode ray tube, or CRT, to display their images. LCDs and plasma displays are sometimes seen, but they are still rare when compared to CRTs. It is even possible to make a television screen out of thousands of ordinary 60-watt light bulbs! You may have seen something like this at an outdoor event like a football game. Let's start with the CRT, however, because CRTs are the most common way of displaying images today. \n\n \nInside a CRT\nAs you can see in the below drawing, there's not a whole lot to a basic cathode ray tube. \n\n \nTo see the rest of this go to: www.howstuffworks.com\n \n\n\n\nThere is a cathode and a pair (or more) of anodes. There is the phosphor-coated screen. There is a conductive coating inside the tube to soak up the electrons that pile up at the screen-end of the tube. However, in this diagram you can see no way to "steer" the beam -- the beam will always land in a tiny dot right in the center of the screen. \n\nThat's why, if you look inside any TV set, you will find that the tube is wrapped in coils of wires. On the next page, you'll get a good view of steering coils. \n\n\n \n\n\n\nThe terms anode and cathode are used in electronics as synonyms for positive and negative terminals. For example, you could refer to the positive terminal of a battery as the anode and the negative terminal as the cathode. \n\nIn a cathode ray tube, the "cathode" is a heated filament (not unlike the filament in a normal light bulb). The heated filament is in a vacuum created inside a glass "tube." The "ray" is a stream of electrons that naturally pour off a heated cathode into the vacuum. \n\nElectrons are negative. The anode is positive, so it attracts the electrons pouring off the cathode. In a TV's cathode ray tube, the stream of electrons is focused by a focusing anode into a tight beam and then accelerated by an accelerating anode. This tight, high-speed beam of electrons flies through the vacuum in the tube and hits the flat screen at the other end of the tube. This screen is coated with phosphor, which glows when struck by the beam.
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http://jef.raskincenter.org/pictures/paper_beams.html\n\nhttp://www.serve.com/chunter/index/info/beams.html
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1. flow of electrons\n2. mechanical energy\n3. motor, lightbulb\n4. the rate of flow of electrons
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molecules are turned into ions....by an electron beam...\nions are separated according to their mass...by a magnet, deflection....\n\nmass spectroscopy can be used to study or analyse mixture of compounds....
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Modern electron microscopes are capable of producing images in which individual atoms or molecules are distinguishable  within the material being viewed (they appear as bumps on the surface.)  However, the actual internal structure of atoms cannot be directly observed using any known technology.
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A particle accelerator. It's a long tube (or sometimes a circle) with magnets in it that accelerate a particle to extremely high speeds. Then, there's a dead end and the atom splits apart into subatomic particles.
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Like the others said...electron.
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what's the boundary conditions?\nself weight problem? \nthen, what's the material of the beam?\n\npls be clear :)
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"A particle accelerator is a device that uses electric fields to propel electrically charged particles to high speeds and magnetic fields to contain them. There are two basic types: linear (i.e., straight-line) accelerators and circular accelerators." - Wiki\n\nRead more here\n\nhttp://en.wikipedia.org/wiki/Particle_accelerators
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HZE Particle\n\nHigh-energy radiation or particles from extraterrestrial space that strike the earth, its atmosphere, or spacecraft and may create secondary radiation as a result of collisions with the atmosphere or spacecraft.
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A laser beam is coherent light, meaning the light waves vibrate at the same speed and reach crests and troughs at the same time, which makes the beam a  strong radiation, since radiation is just very energetic waves.  I guess it is pure light energy just in a modified form
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A laser (from the acronym Light Amplification by Stimulated Emission of Radiation) is an optical source that emits photons in a coherent beam. Laser light is typically near-monochromatic, i.e. consisting of a single wavelength or color, and emitted in a narrow beam. This is in contrast to common light sources, such as the incandescent light bulb, which emit incoherent photons in almost all directions, usually over a wide spectrum of wavelengths.\n\nhttp://en.wikipedia.org/wiki/Laser\nhttp://www.howstuffworks.com/laser.htm