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&DRIFT: TRACK: HEED: particle


ELECTRON

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

Delta 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 delta 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
"-> &CELL -> plane" x -10
pl x +10 v=2000

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

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

Simulation of the absorption of an Fe55 photon.

PION-MINUS

Treated as an ordinary charged particle.

Mass: 139.56995 MeV, charge: -1


PION-0

Not meaningful.

PION-PLUS

Treated as an ordinary charged particle.

Mass: 139.56995 MeV, charge: +1


KAON-MINUS

Treated as an ordinary charged particle.

Mass: 493.677 MeV, charge: -1


KAON-0

Not meaningful: Heed does not generate ionisation deposits for uncharged particles with the exception of photons.

KAON-PLUS

Treated as an ordinary charged particle.

Mass: 493.677 MeV, charge: +1


PROTON

Treated as an ordinary charged particle.

Mass: 938.27231 MeV, charge: +1


ANTI-PROTON

Treated as an ordinary charged particle.

Mass: 938.27231, charge: -1


NEUTRON

Not meaningful: Heed does not generate ionisation deposits for uncharged particles with the exception of photons.

ANTI-NEUTRON

Not meaningful: Heed does not generate ionisation deposits for uncharged particles with the exception of photons.
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Formatted on 0105-10-15 at 17:17.