Issues in detector alignments of "transposed" detectors were observed with the Kalman Filter Alignment resulting in diverging alignment parameters.
A transposition results into the following possible euler angles ('xyz'):
- [-pi, 0, -pi / 2.0]
- [pi, 0, -pi / 2.0]
- [0, pi, pi / 2.0]
- [0, -pi, pi / 2.0]
None of these starting values results into a successful alignment using the KFA.
The proposed solution is either to:
- transpose your data before the actual analysis or,
- use the regular alignment which might lead to a residual offset in one direction
NB: The problem seems to be a rotation of alpha or beta by +- pi. The Alignment of heavily rotated devices could be confirmed
Issues in detector alignments of "transposed" detectors were observed with the Kalman Filter Alignment resulting in diverging alignment parameters.
A transposition results into the following possible euler angles ('xyz'):
None of these starting values results into a successful alignment using the KFA.
The proposed solution is either to:
NB: The problem seems to be a rotation of alpha or beta by +- pi. The Alignment of heavily rotated devices could be confirmed