Measurement of nu -Values for TARN by the RF Knock-out Method

摘要

The number of betatron oscillations per revolution ( nu -value) can be measured experimentally by an RF knock-out method. The principle of the method is formulated. The RF knock-out system for TARN was desgned and constructed. Its design and specifications are described in detail. The experimental results with H sub 2+ and He exp 2+ beams with the kinetic energy of 7 MeV/u are compared with the calculation with the computer program SYNCH. The nu sub(x) and nu sub(z) were measured to be 2.29 and 2.12, respectively, for the excitation currents of the quadrupole magnets; I sub(D) = 121 A (G sub(D) = 0.212 kG/cm) and I sub(F) = 74.5 A (G sub(F) = 0.131 kG/cm). The calculation indicates that the corresponding values are 2.21 and 2.19, respectively, which are in fairly good agreement with the experimental ones. (Atomindex citation 13:661957)