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Raise appropriate error if the context in which the trackers are built is not on CPU #433

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merged 1 commit into from
Feb 12, 2024
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Raise appropriate error if the context in which the trackers are built is not on CPU #433

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11 changes: 11 additions & 0 deletions xtrack/multiline/multiline.py
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Original file line number Diff line number Diff line change
Expand Up @@ -470,6 +470,17 @@ def configure_beambeam_interactions(self, num_particles,

'''

# Check that the context in which the trackers are built is on CPU
for nn in ["clockwise", "anticlockwise"]:
if self._bb_config[f"{nn}_line"] is None:
continue
line = self.lines[self._bb_config[f"{nn}_line"]]
if not isinstance(line.tracker._context, xo.ContextCpu):
raise ValueError(
"The trackers need to be built on CPU before "
"configuring the beam-beam elements."
)

if self._bb_config['dataframes']['clockwise'] is not None:
bb_df_cw = self._bb_config['dataframes']['clockwise'].copy()
else:
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