what is a linear accelerator used for

Also, they are useful in particle physics because they can produce the highest kinetic energy that can be achieved directly by the linear accelerator. Linear accelerators are also called particle accelerators. Prolonged use of high powered (>18MeV) machines can induce a significant amount of radiation within the metal parts of the head of the machine after power to the machine has been removed (i.e. Each stage is optimised to allow close coupling and synchronous operation during the beam energy build-up. Role of the linear accelerator in radiation therapy for cancer [28], In the two diagrams, the curve and arrows indicate the force acting on the particles. The development of high-frequency oscillators and power amplifiers from the 1940s, especially the klystron, was essential for these two acceleration techniques . The plan is checked thoroughly before treatment is given and quality procedures ensure that the treatment is delivered in a planned manner. (An increase in speed cannot be seen in the scale of these images.). In a linear particle accelerator, the drift tube has positive potential while electrons have a negative potential. This allowed Hansen to use an accelerating structure consisting of a horizontal waveguide loaded by a series of discs. PubMedGoogle Scholar. In 1997, A further step was taken to advance the use of linear accelerators by combining with intensity modulation radiation therapy. [7], The initial Alvarez type linacs had no strong mechanism for keeping the beam focused, and were limited in length and energy as a result. Some of the major technological advancements that have generated replacement needs have been: (1) the computerization of linear accelerators in the late 1980s ; (2) the development of multi-leaf collimators (MLCs) and portal imaging devices in the 1990s; (3) the development of KV-Imaging systems for linear accelerators, in the 2000s; and VMAT, SRS and hypo-fractionation technologies in the 2010s. Accelerate the electrons nearly to the light speed. //

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