By Sharon Traweek

Seems on the lifetime of particle physicists, displaying who those everyone is and what their international is basically like. Traweek exhibits their similarities and adjustments, how their careers are formed, how they have interaction with their colleagues and the way their rules approximately time and house form their social constitution.

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**Example text**

KB Ti ≈ 1 to 5 eV). 11). For experiments in which a high-intensity beam is to be focused to a small spot size, the unnormalized emittance at the ﬁnal beam energy, = n /βγ , which represents the product of beam radius and divergence angle, is an important parameter. It is inversely proportional to the relativistic velocity and energy factors β = v/c and γ = (1 − β 2 )−1/2 , and hence decreases as the particles are accelerated to high energy. Emittance by itself is not sufﬁcient to characterize the beam quality.

However, rather than using the (qi , q˙i ) pairs as independent variables, generalized momenta, pi , also known as canonical momenta or conjugate momenta, are introduced in place of the q˙i . These momenta are deﬁned as follows: pi = ∂L(qi , q˙i , t) . 50c) or, in vector form, p = γ mv + qA. 51) The canonical momentum thus contains the added term of the vector potential A when a magnetic ﬁeld is present. 51) as P = γ mv = p − qA. 54b) pθ = = 2 1/2 ˙ (1 − β ) c2 ∂θ ∂L = γ m˙z + qAz . 54c) pz = ∂ z˙ It is important to recognize that the canonical angular momentum pθ does not have the same dimensions as pr and pz .

17, Chap. 6]. 11]. 4. 2) but may also be signiﬁcant in low-energy beam focusing, transport, and acceleration devices. 3. 5 a brief survey of the methods to reduce emittance (beam cooling) in storage rings. 6, we summarize the key topics that were discussed, comment on some questions that were left open, and mention a few issues that need further research. The application of the theory to the design of charged particle beams is stressed throughout the book. Many formulas, scaling laws, graphs, and tables are presented in the text to aid the experimentalists and the designers of charged particle beam devices.