Linear Accelerator
Definition and meaning of Linear Accelerator in chemistry.
A linear accelerator is a particle accelerator that increases the kinetic energy of charged subatomic particles or ions by subjecting them to a series of oscillating electric potentials along a linear beamline.
In more detail
Also known as a linac, this device uses microwave frequency electromagnetic waves to accelerate electrons, protons, or heavier ions in a straight line. As the charged particles pass through a series of hollow metallic drift tubes, the oscillating electric field is timed so that the particles are continuously pulled forward, gaining speed and energy at each gap. In physical chemistry, linear accelerators are often used to generate high-energy electrons for pulse radiolysis studies. They are also crucial in the production of specific radioisotopes used in radiochemistry and medical imaging applications.
Key facts
| Field | Physical Chemistry |
|---|---|
| Accelerated Particles | Electrons, protons, or ions |
| Application | Pulse radiolysis |
A linac is frequently used in pulse radiolysis to deliver a microsecond burst of high-energy electrons into a water sample, generating highly reactive transient species like the hydrated electron and hydroxyl radical for kinetic chemical studies.
Frequently asked questions
How does a linear accelerator differ from a cyclotron?
A linear accelerator accelerates particles in a straight line, while a cyclotron uses a constant magnetic field to accelerate particles in a spiral path.
What is the primary chemical application of a linac?
In chemistry, they are primarily used to study fast reaction kinetics via pulse radiolysis.