Secondary pion beams at GSI

Abstract

Protons and "1"2C ions from the 18 Tm synchrotron have been used to irradiate a production target of beryllium, with the resulting pion beams being transported to the nearest downstream experimental area. The beam line accomodates pion momenta up to 2.8 GeV/c and has a momentum acceptance of 8%. For "1"2C projectiles with the maximum energy of 2A GeV the negative pion yields reach values of 1 x 10"7/spill near the peak of the momentum distribution around 1 GeV/c, if extrapolated to the space charge limit of the synchrotron. The corresponding p-induced yields at 3.5 GeV are smaller except for hard pions for which the production exceeds the "1"2C-induced intensities because of the higher energy per nucleon. (orig.)4 refs.Available from TIB Hannover: RO 801(99-13) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman