&DRIFT: TRACK: HEED: particle

ELECTRON

Electrons are treated as \δ-electrons and should have energies in the order of a few keV.

\δ-Electrons with an energy less than twice the cuteneBdel compilation parameter of Heed, usually set to 1\ keV, do not undergo scattering during their absorption into ionisation electrons.

When using electrons as primary particle, it is advisable not to use the ENERGY-CUT option.

Mass: 0.51099907\ MeV, charge: -1

POSITRON

Positrons are treated as \δ-electrons and should have energies in the order of a few keV.

Mass: 0.51099907\ MeV, charge: +1

MU-MINUS

Treated as an ordinary charged particle.

Mass: 105.658389\ MeV, charge: -1

MU-PLUS

Treated as an ordinary charged particle.

Mass: 105.658389\ MeV, charge: +1

TAU-MINUS

Treated as an ordinary charged particle.

Mass: 1777.00\ MeV, charge: -1

TAU-PLUS

Treated as an ordinary charged particle.

Mass: 1777.00\ MeV, charge: +1

GAMMA

Treated as a photo electron, hence only absorbed through the photo-electric effect. The energies should not far exceed 10\ keV.

Mass: 0, charge: 0.

Example:

&CELL
plane x=-10
plane x=+10 v=2000

&GAS
arg-50-eth-50
heed argon 70 co2 30

&DRIFT
area -10 -10 -9 10
track -10 5 10 5 gamma energy 5.9 kev
Global done
Call book_histogram(xhist,100,-10,-5)
Call book_histogram(nhist,100,50,250)
For i From 1 To 1000 Do
   If entier(i/100)*100=i Then Say "Iteration {i} ..."
   Call new_track
   Global nelec=0
   Do
      Call get_cluster(x,y,z,e,n,done)
      If done Then Leave
      Call fill_histogram(xhist,x)
      Global nelec=nelec+1
   Enddo
   Call fill_histogram(nhist,nelec)
Enddo
Call plot_histogram(nhist)
Call plot_end
Call plot_histogram(xhist)
Call plot_end