source: PSPA/madxPSPA/doc/usrguide/Introduction/dipedge.html @ 430

Last change on this file since 430 was 430, checked in by touze, 11 years ago

import madx-5.01.00
File size: 1.8 KB
Line 
1<head>
2<title>Dipedge</title>
3<!-- Changed by: Frank Schmidt, 27-FEB-2005 -->
4</head>
5
6<body bgcolor="#ffffff">
7
8<center>
9EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH
10<IMG SRC="http://cern.ch/madx/icons/mx7_25.gif" align=right>
11<H2>Dipedge Element</H2>
12</center>
13<p>
14A thin element describing the edge focusing of a dipole has been
15introduced in order to make it possible to track trajectories in the
16presence of dipoles with pole face angles. Only linear terms are
17considered since the higher order terms would the tracking
18non-symplectic. The transformation of the machine elements into thin
19lenses leaves dipedge untouched and splits correctly the SBENDS's.
20<p>
21It does not make sense to use it alone. It can be specified at the
22entrance and the exit of a SBEND.
23
24They are defined by the commands:
25<PRE>
26label : dipedge, h=real, e1=real, fint=real, hgap=real, tilt=real;
27</PRE>
28It has zero length and five attributes.
29<UL>
30<LI>H:
31Is angle/length or 1/rho (default: 0 m<sup>-1</sup> - for the default
32the dipedge element has no effect).
33(must be equal to that of the associated SBEND)
34<LI>E1:
35The rotation angle for the pole face.The sign convention
36is as for a SBEND <a href="bend.html">Bending Magnet</a>. Note that it
37is different for an entrance and an exit.
38(default: 0 rad).
39<LI>FINT: field integral as for SBEND
40<a href="local_system.html#sbend">sector bend</a>. Note that each dipedge
41has its own fint, so fintx is no longer necessary.
42<LI>HGAP: half gap height of the associated SBEND
43<a href="bend.html">Bending Magnet</a>.
44<p><LI>TILT:
45The roll angle about the longitudinal axis (default: 0 rad,
46i.e. a horizontal bend). A positive angle represents a clockwise
47rotation.
48</UL>
49
50<p>
51<address>
52<a href="http://www.cern.ch/Frank.Schmidt/frs_sign.html">frs</a>,
53February 27, 2005
54</address>
55</body>
Note: See TracBrowser for help on using the repository browser.