S. Hagmann,
P. Hillenbrand,
Y. Litvinov,
U. Spillmann,
and T. Stöhlker
The magnetic toroidal sector as a broad-band electron–positron pair spectrometer I. lepton trajectories
Nucl. Instr. Meth. Phys. Res. A, 946 :162641 (December 2019)
The magnetic toroidal sector as a broad-band electron–positron pair spectrometer I. lepton trajectories
Nucl. Instr. Meth. Phys. Res. A, 946 :162641 (December 2019)
Abstract:
We report an analysis of electron-optical properties of a toroidal magnetic sector spectrometer and examine parameters for its implementation in a relativistic heavy-ion storage ring like HESR. For studies of free-free pair production in heavy-ion atom collisions this spectrometer exhibits very high efficiencies for coincident e(+)- e(-) pair spectroscopy over a wide range of momenta of emitted lepton pairs. The high coincidence efficiency of the spectrometer is the key for stringent tests of theoretical predictions for the coincident positron- and electron emission characteristics and for the phase space correlation of lepton vector momenta in free-free pair production.