Longitudinal Schottky spectra of a bunched Ne¹⁰⁺ion beam at the CSRe

【摘要】 The longitudinal Schottky spectra of a radio-frequency(RF) bunched and electron cooled22Ne10+ion beam at 70 MeV/u have been studied by a newly installed resonant Schottky pick-up at the experimental cooler storage ring(CSRe),at IMP.For an RF-bunched ion beam,a longitudinal momentum spread of p/p = 1.6×10 5has been reached with less than 107stored ions.The reduction of momentum spread compared with a coasting ion beam was observed from Schottky noise signal of the bunched ion beam.In order to prepare the future laser cooling experiment at the CSRe,the RF-bunching power was modulated at 25th,50thand 75thharmonic of the revolution frequency,efective bunching amplitudes were extracted from the Schottky spectrum analysis.Applications of Schottky noise for measuring beam lifetime with ultra-low intensity of ion beams are presented,and it is relevant to upcoming experiments on laser cooling of relativistic heavy ion beams and nuclear physics at the CSRe.更多还原

【Abstract】 The longitudinal Schottky spectra of a radio-frequency(RF) bunched and electron cooled22Ne10+ion beam at 70 MeV/u have been studied by a newly installed resonant Schottky pick-up at the experimental cooler storage ring(CSRe),at IMP. For an RF-bunched ion beam,a longitudinal momentum spread of p/p = 1.6×10 5has been reached with less than 107stored ions. The reduction of momentum spread compared with a coasting ion beam was observed from Schottky noise signal of the bunched ion beam. In order to prepare the future laser cooling experiment at the CSRe,the RF-bunching power was modulated at 25th,50thand 75thharmonic of the revolution frequency,efective bunching amplitudes were extracted from the Schottky spectrum analysis. Applications of Schottky noise for measuring beam lifetime with ultra-low intensity of ion beams are presented,and it is relevant to upcoming experiments on laser cooling of relativistic heavy ion beams and nuclear physics at the CSRe.更多还原