Computing for accelerator physics Ilya Agapov, 7/12/09, DESY ...

MAD­X
Widely used beam optics code www.cern.ch/mad
LHC standard; has built­in high precision integrators (PTC), treats hight order multipoles
Comprehensive set of beam physics processes
Matching of beam parameters
Spits out optics tables, can be plotted with external tools or built­in ps driver
call file="../LHC-cell.seq";
kqf = 0.010988503297557 ;
kqd = -0.011623337240602 ;
Beam, particle = proton, sequence=lhccell, energy = 450.0,
NPART=1.05E11, sige= 4.5e-4 ;
use,period=lhccell;
select, flag=twiss, clear;
select, flag=twiss,column=s,name,betx,bety,mux,muy;
twiss, sequence=lhccell,file='twiss-output';
match,sequence=lhccell;
constraint,sequence=lhccell,range=#e,mux=0.28,muy=0.31;
vary,name=kqf,step=1.0e-6;
vary,name=kqd,step=1.0e-6;
lmdif,calls=500,tolerance=1.e-21;
endmatch;
value, kqf;
value, kqd;