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Single-Particle Electrodynamics - Assassination Science

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+ 1 r(n·... v) ˙v×σ − 1 3 8 r(n·σ)n×.... v − 1 r(n·σ) ˙v×... v<br />

3<br />

− 1 r(n· ˙σ)n×... v − 2 2 3 r(n· ˙σ) ˙vרv − 3 r(n· ¨σ)nרv<br />

4<br />

− 1 r(n·... σ)n× ˙v − 2 2 3 r( ˙v·¨v)n× ˙σ + 5 r( ˙v·¨v) ˙v×σ<br />

4<br />

+ 1 3 r(¨v·σ)nרv + 2 3 r(¨v· ˙σ)n× ˙v + 1 3 r(... v·σ)n× ˙v<br />

− 15<br />

16 r ˙v2 (n· ˙v)n× ˙σ + 3r ˙v 2 (n· ˙v) ˙v×σ − 15<br />

16 r ˙v2 (n·σ)nרv<br />

− 15<br />

8 r ˙v2 (n· ˙σ)n× ˙v + r ˙v 2 ( ˙v·σ)n× ˙v + 5 r(n· ˙v)(n·¨v) ˙v×σ<br />

4<br />

− 5 8 r(n· ˙v)(n·σ) ˙vרv + 5 r(n· ˙v)(¨v·σ)n× ˙v<br />

8<br />

+ 15<br />

16 r(n· ˙v)2 (n·σ)nרv + 15<br />

8 r(n· ˙v)2 (n· ˙σ)n× ˙v<br />

− 5 4 r(n·σ)( ˙v·¨v)n× ˙v + 5 4 r(n· ˙v)(n·¨v)(n·σ)n× ˙v + O(r2 ).<br />

Computing the three-divergences of these expressions, we find<br />

∇·E q point = δ(r),<br />

∇·E d point = −(σ·∇)δ(r),<br />

∇·B q point = 0,<br />

∇·B d point = 0.<br />

G.6.21<br />

Redshift-weighted self-fields<br />

Multiplying the field expressions of Section G.6.19 by the redshift factor λ,<br />

we find<br />

λE q 1 = −r −1<br />

d<br />

˙v + rd<br />

−1 (n d· ˙v)n d + ¨v − 1 2 ˙v2 n d + (n d· ˙v) ˙v − 1 2 (n d· ˙v) 2 n d<br />

− (n d·¨v)n d + O(ε),<br />

505

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