It is now easy to see that a linear relation exists also between energy differences in the two configurations. If we add to the interactions Vij a constant term -EQ (EO might be chosen to be the energy of the ground state in the ^3/2/7/2 configuration), it will contribute to all levels of the configuration ^3/2/7/2 the same energy -EQ, and to all levels of the dziifi^ configuration the same energy -3Eo. Thus we obtain the following relations, where £^=£(^3/2/7/2/) and E/^E{d zl if v J):
A radial sector FFAG accelerator has been constructed and successfully operated. In this 8-sector accelerator electrons are betatron accelerated from 25 to 400 kev using both continuous and pulsed injection. The number of radial betatron oscillations per revolution may be varied from 2.3 to 3 and the number of vertical oscillations per revolution from 1 to 3. Calculations of these oscillation frequencies using various approximations are described and discussed. These frequencies have been measured statically with the unaccelerated beam and dynamically using an rf perturbing voltage on the accelerated beam. Results of these calculations and experiments are in satisfactory agreement. Effects of misalignments have been measured and are in close agreement with calculations presented. A survey has been made over a large area of the betatron oscillation stability region. The effects of the many resonances observed are in good qualitative agreement with theory.
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