Question

State any two limitations of linear accelerator.​

Answer 1

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The main advantage of linear accelerators is that the particles are able to reach very high energies without the need for extremely high voltages. The main disadvantage is that, because the particles travel in a straight line, each accelerating segment is used only once.

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Answer 2

Answer:

• By exposing charged subatomic particles or ions to a succession of oscillating electric potentials along a linear beamline, a linear particle accelerator—often abbreviated as linac—accelerates them to high speeds.
• Linacs are used for a variety of reasons, including producing X-rays and high-energy electrons for radiation therapy, acting as particle injectors for higher-energy accelerators, and directly generating the maximum kinetic energy for light particles (electron and positron) for particle physics.
• Whether electrons, protons, or ions are being accelerated determines the linac's architecture.
• Limitations:

1. The possible placements are limited by the device's length.
2. The expense of building and maintenance for this component is increased by the necessity of several driver devices and the power supply that go with them.
3. The wall resistance quickly transforms electric energy into heat if the accelerating cavities' walls are composed of usually conducting material and the accelerating fields are strong. On the other hand, quenches limit the accelerating fields and superconductors also require regular cooling to keep them below their critical temperature. As a result, high energy accelerators like SLAC, which is still the longest in the world (in all of its incarnations), are operated in brief pulses, which restricts the average current output and forces experimental detectors to handle data that arrives in bursts.

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