Optimization and first tests of the experimental setup to investigate the double-polarized DD-fusion reactions. (1st August 2020) - Solovev, A.; Andreyanov, A.; Barion, L.; Ciullo, G.; Engels, R.; Fotyev, V.; Ivshin, K.; Kochenda, L.; Kravchenko, P.; Kravtsov, P.; Larionov, V.; Rozhdestvensky, A.; et al.