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add function to shoot electrons with settable energy from upstream #1501

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add function to shoot electrons with settable energy from upstream #1501

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add function to shoot electrons with settable energy from upstream t…
bloodyyugo Dec 23, 2024
c5beb0d
Update SimCore/python/generators.py
bloodyyugo Dec 24, 2024
0487579
Update SimCore/python/generators.py
bloodyyugo Dec 24, 2024
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24 changes: 24 additions & 0 deletions SimCore/python/generators.py
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Original file line number Diff line number Diff line change
Expand Up @@ -311,6 +311,30 @@ def single_8gev_e_upstream_tagger():
)


def single_8gev_beam_pipe(ene = 8.0):
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def single_8gev_beam_pipe(ene = 8.0):
def single_e_beam_pipe(ene = 8.0):

"""Configure a particle gun to fire an electron of settable energy
upstream of the tagger tracker.

The starting position here is well upstream of the analyzing magnet
the position/angle of the gun is such that 8 gev electrons arrive
at the target z=0 at xy=(0,0). This generator is used to study
off-energy beam electrons.

Note that if an energy != 8gev, the trajectory will be different.
And many electrons with energies sufficiently lower than 8GeV will just curve
into the side of the magnet and not reach the target.

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Returns
-------
Instance of a particle gun configured to fire a single 8 GeV electron
upstream of the entire detector apparatus.
"""
return _single_e_upstream_tagger(
[ -299.2386690686212, 0.0, -6000.0 ],
[ 434.59663056485 , 0.0, 7988.698356992288],
ene
)

def single_backwards_positron(energy: float):
"""A particle gun configured to shoot positrons backwards (i.e. upstream)
from the target at the input energy.
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