Erlangen 2026 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 2: Hadron Structure and Spectroscopy I

HK 2.6: Talk

Monday, March 16, 2026, 18:00–18:15, PHIL C 301

Sieve optimization for calibration of the MAGIX spectrometers — •Alen Gajer for the MAGIX collaboration — KPH, JGU, Mainz, Germany

The MAGIX experiment, currently under development at the MESA accelerator in Mainz, will enable a broad range of precision measurements using electron scattering on fixed targets. The core component are two high-resolution magnetic spectrometers that separate scattered particles according to their momentum and detect them at the focal plane.

To extract scattering variables at the target, accurate reconstruction of the particle trajectories from focal-plane measurements is required. This is achieved through spectrometer optics, using a matrix formalism method that relates measured and target variables. Determining the corresponding transport tensor components demands a dedicated calibration run with a sieve collimator placed in front of the spectrometers entrance.

Since the performance of the calibration directly depends on the sieve geometry, designing it is a nontrivial task. We present a simulation-based optimization approach, which evaluates the sieve pattern based on the quality of the reconstruction.

Keywords: magnetic spectrometers; optical callibration; sieve optimization; MAGIX; track reconstruction