Tracking with the MINOS Time Projection Chamber

C. Santamaria (1) , A. Obertelli (1) , S. Ota , M. Sasano , E. Takada , L. Audirac (1) , H. Baba , D. Calvet (1) , F. Château (1) , A. Corsi (1) , A. Delbart (1) , P. Doornenbal , A. Giganon (1) , A. Gillibert (1) , Y. Kondo , Y. Kubota , C. Lahonde-Hamdoun (1) , V. Lapoux (1) , D. Leboeuf (1) , C.S. Lee , H.N. Liu (1) , M. Matsushita , T. Motobayashi , M. Niikura , M. Kurata-Nishimura , H. Otsu , A. Peyaud (1) , E.C. Pollacco (1) , G. Prono (1) , H. Tokieda , T. Uesaka , J. Zenihiro

1 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers

We report on the performance of the MINOS Time Projection Chamber developed as a vertex tracker to study exotic nuclei produced from hydrogen-induced knockout via in-beam γ -ray and invariant-mass spectroscopy. In-beam measurements with 4 He and  20 Ne beams at 200 and 350 MeV/nucleon, respectively, were performed at the HIMAC facility. The tracking algorithm for protons after quasi-free scattering is described. Realistic simulations and physics experiments are compared and show a good agreement. The vertex position resolution reaches 5 mm FWHM, mostly from re-scattering with the target and the Aluminum reaction chamber. The overall efficiency of vertex reconstruction is also benchmarked with the first experimental campaign data performed at the RIBF, confirming an overall efficiency better than 90% for physics experiments.

Mots clés: Time Projection Chamber; Tracking software; Hough transform; Spectroscopy of exotic nuclei; track data analysis; spatial resolution; time projection chamber; efficiency; MINOS; vertex detector; programming; performance; numerical calculations; benchmark

Domaines: Instrumentations et Détecteurs [physics.ins-det]

C. Santamaria, A. Obertelli, S. Ota, M. Sasano, E. Takada, et al.. Tracking with the MINOS Time Projection Chamber. Nucl.Instrum.Meth.A, 2018, 905, pp.138-148. ⟨10.1016/j.nima.2018.07.053⟩. ⟨hal-01886162⟩