| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Beta Limit | Physics | 1: Also known as the Troyon Limit in a tokamak, the beta limit is the maximum achievable ratio (beta, or beta value) of plasma pressure to magnetic pressure for a given plasma to remain stable. In a tokamak, if the beta value is too high, ballooning modes become unstable and lead to a loss of plasma confinement. (references) | |
| 2: Maximum beta attainable, usually due to a deterioration in the confinement. The Troyon beta limit, which states that beta (in percent) cannot exceed g.I / a.B is often quoted. Here, g is the so-called Troyon coefficient, and has an value of around 3.5 for conventional tokamaks. (I is the plasma current in MegaAmps, a is the minor radius in metres, and B is the toroidal field in Tesla.) The normalized beta is given by beta.a.B / I, and (when quoted in percent) cannot exceed g. (references) | |||
| Beta limit | Transportation | Stress leading to 100 percent damage within five hours/flight. Source: European Union. (references) | |
| Troyon beta limit | Physics | See beta limit. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
