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Error when using BPM with parameter beam #101

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jank324 opened this issue Nov 13, 2023 · 0 comments · Fixed by #102
Closed

Error when using BPM with parameter beam #101

jank324 opened this issue Nov 13, 2023 · 0 comments · Fixed by #102
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jank324 commented Nov 13, 2023

The following MWE

segment = cheetah.Segment(
    elements=[
        cheetah.Drift(length=torch.tensor(1.0)),
        cheetah.BPM(name="my_bpm"),
        cheetah.Drift(length=torch.tensor(1.0)),
    ],
)
beam = cheetah.ParameterBeam.from_astra("benchmark/cheetah/ACHIP_EA1_2021.1351.001")

segment.my_bpm.is_active = True

_ = segment.track(beam)

throws

AttributeError: 'ParameterBeam' object has no attribute '_mu_x'
@jank324 jank324 added the bug Something isn't working label Nov 13, 2023
@jank324 jank324 self-assigned this Nov 13, 2023
@jank324 jank324 mentioned this issue Nov 13, 2023
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@jank324 jank324 linked a pull request Nov 13, 2023 that will close this issue
101 error when using bpm with parameter beam #102
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101 error when using bpm with parameter beam desy-ml/cheetah
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