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In 1890, Arthur Schuster demonstrated cathode rays could be deflected by electric fields, and William Crookes showed they could be deflected by magnetic fields. Hittorf observed that some unknown rays were emitted from the cathode (negative electrode) which could cast shadows on the glowing wall of the tube, indicating the rays were traveling in straight lines. 3.2.4 Magnetic shielding and degaussingĬathode rays were discovered by Julius Plücker and Johann Wilhelm Hittorf.3.2.3 Convergence and purity in color CRTs.2.4.1 Construction and method of operation.The electrons are steered by deflection coils or plates, and an anode accelerates them towards the phosphor-coated screen, which generates light when hit by the electrons. Ī CRT works by electrically heating a tungsten coil which in turn heats a cathode in the rear of the CRT, causing it to emit electrons which are modulated and focused by electrodes. Flat-panel displays can also be made in very large sizes whereas 40 in (100 cm) to 45 in (110 cm) was about the largest size of a CRT. Since the early 2010s, CRTs have been superseded by flat-panel display technologies such as LCD, plasma display, and OLED displays which are cheaper to manufacture and run, as well as significantly lighter and less bulky.

CRTs make up most of the weight of CRT TVs and computer monitors. The face is typically made of thick lead glass or special barium-strontium glass to be shatter-resistant and to block most X-ray emissions. As such, handling a CRT carries the risk of violent implosion that can hurl glass at great velocity.

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The interior is evacuated to approximately 0.01 pascals (9.9 ×10 −8 atm) to 133 nanopascals (1.31 ×10 −12 atm), to facilitate the free flight of electrons from the gun(s) to the tube's face without scattering due to collisions with air molecules. Ī CRT is a glass envelope which is deep (i.e., long from front screen face to rear end), heavy, and fragile. Electrostatic deflection is commonly used in oscilloscopes. In modern CRT monitors and televisions the beams are bent by magnetic deflection, using a deflection yoke. In color devices, an image is produced by controlling the intensity of each of three electron beams, one for each additive primary color (red, green, and blue) with a video signal as a reference. In CRT television sets and computer monitors, the entire front area of the tube is scanned repeatedly and systematically in a fixed pattern called a raster. The term cathode ray was used to describe electron beams when they were first discovered, before it was understood that what was emitted from the cathode was a beam of electrons. CRTs have also been used as memory devices, in which case the screen is not intended to be visible to an observer. A CRT on a television set is commonly called a picture tube. The images may represent electrical waveforms ( oscilloscope), pictures ( television set, computer monitor), radar targets, or other phenomena. Play to everyone's strengths and leave no room for weaknesses.The only visible differences are the single electron gun, the uniform white phosphor coating, and the lack of a shadow mask.Ī cathode-ray tube ( CRT) is a vacuum tube containing one or more electron guns, which emit electron beams that are manipulated to display images on a phosphorescent screen. Team Focus: You'll need to work with your team of allies who are also in their own wacky vehicles if you want to succeed. You'll need to choose your role and man your own crazy vehicle as you try to destroy your enemies by delivering a bomb to their base if only for your own survival.Ĭlass Roles: Become an Interceptor, Support, or Transport vehicle to either take the bomb from the enemy, heal and shield your allies, or run the bomb to the enemy's base.Įxplosions: Don't take too much damage otherwise your vehicle might succumb to instability and explode on you! In a world now riddled with utter madness, chaos, and nonstop destruction your wits will be put to the test. The apocalypse is finally over and there are only Heavy Metal Machines remaining.

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Heavy Metal Machines is a free-to-play sci-fi strategy racing game developed by Hoplon Infotainment for PC and will be available on Steam for download sometime in 2016.

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