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ZGOUBI USERS' GUIDE - HEP

ZGOUBI USERS' GUIDE - HEP

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4.4 Optical Elements and related numerical procedures 109^^^¡ >T ¡¡£T 4 1¡> 4 G1¡> 4 1¡> 4 U1>£T 4 1£T 4 1>sTsQUADISEX, SEXQUAD: Sharp edge magnetic multipolesSEXQUAD defines in a simple way a sharp edge field with quadrupolar, sextupolar and octupolar components. QUADI-SEX adds a dipole component. The length of the element is § ¨ . The vertical component ¡\ of thefield and its derivatives in median plane are calculated at each step from the following expressions§©"$Œ"[º—¡ • ¡ ¡ 4‰ £1 4 o ¡ 4£1 4 @ o£T 4 s 1^ o @> ¡ 4^ T G ¡ 4and then extrapolated out of the median plane by Taylor expansion in (see section 1.3.2).^ With option SEXQUAD, ‰ C\, while with QUADISEX, ‰ q .

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