## Isobar Magnetic Field Calculation (2012 Mass Table) | |

Testing this at this time
Comments about isobar separation at HRIBF: - Mass excess values are from the 2012 mass table of
G. Audi, M. Wang, A. H. Wapstra, F. G. Kondev, M. MacCormick, X. Xu, and B. Pfeiffer,
Chinese Physics C
**36**, 1287 (2012) and M. Wang, G. Audi, A. H. Wapstra, F. G. Kondev, M. MacCormick, X. Xu, and B. Pfeiffer, Chinese Physics C**36**, 1603 (2012). This version of the Mass Table was taken from AMDC at IMP in China; - Isobaric mass differences are given as
M/dM = A * 931.5 / (dM1 - dM2) where dM1 is the mass excess of the desired beam and dM2 is the mass excess of the neighboring isobars. - The isobar separator has a resolving power of M/dM~20,000; however, the isobaric separation actually achieved will depend not only on isobaric mass differences but also on the beam emittance, energy spread, and isobar intensity ratios.
- The dispersion of the isobaric separator is given by:
dx(mm) = 5163 * dM/M (or dE/E if energy spread dominates). This corresponds to 0.258 mm for M/dM = 20,000. - Partial isobaric separation will usually be possible for M/dM<10,000, but may result in reduced beam intensity.
- Energy is determined by the anode voltage (+0.150 kV), ion source voltage (+/-40 kV), and platform voltage (+/-160 kV). Typical energy for injection into the tandem is 200.15 keV.
| |

This file last modified |