3.4.3 sample and csample

To record the tracking results one uses the sample and csample commands. To insert a sampling plane before <element> the following command should be used:

sample, range=<element>;

Example:

     
     sample, range=d;
     

To put a cylindrical sampler of length l0 (in [m]) around element <element> at distance r0 (in [m]) the following command should be used:

csample, range=<element>, r=r0, l=l0;

Samplers output the following parameters at the specified location:

E	Energy[GeV]	E0	Energy at last scatter[Gev]
X	Global X position	s	path length
Y	Global Y position	t	time of flight
Z	Global Z position	t0	time of flight at last scatter
Xp	Global angle in x-z	trackID	trackID of particle
Yp	Global angle in y-z	weight	weight of track
Zp	1-sqrt(Xp^2+Yp^2)	parentID	trackID of parent particle
x	Relative x position	x0	x at last scatter
y	Relative y position	y0	y at last scatter
z	Relative z position 1	z0	z at last scatter
xp	Relative angle in x-z	xp0	xp at last scatter
yp	Relative angle in y-z	yp0	yp at last scatter
zp	1-sqrt(xp^2+yp^2)	zp0	xp at last scatter
nEvent	Event number	partID	PDG particle identifier