The trap design of PENTATRAP |
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Authors: | C Roux C B?hm A D?rr S Eliseev S George M Goncharov Y N Novikov J Repp S Sturm S Ulmer K Blaum |
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Institution: | 1. Max-Planck-Institut für Kernphysik, 69117, Heidelberg, Germany 2. Fakult?t für Physik und Astronomie, Ruprecht-Karls-Universit?t, 69120, Heidelberg, Germany 3. Extreme Matter Institute EMMI, Helmholtz Gemeinschaft, 64291, Darmstadt, Germany 6. National Superconducting Cyclotron Laboratory, MSU, East Lansing, MI, 48824-1321, USA 4. St. Petersburg Nuclear Physics Institute, 188300, Gatchina, Russia 5. Institut für Physik, Johannes Gutenberg-Universit?t, 55099, Mainz, Germany 7. RIKEN Advanced Science Institute, Hirosawa, Wako, Saitama, 351-0198, Japan
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Abstract: | A novel Penning-trap tower consisting of five compensated cylindrical Penning traps is developed for the PENTATRAP mass spectrometer at the Max-Planck-Institut für Kernphysik in Heidelberg, Germany. An analytical expression for the electrostatic potential inside the trap tower is derived to calculate standard Penning-trap properties like the compensation of anharmonicities and an orthogonal geometry of the trap electrodes. Since the PENTATRAP project described in the preceding article aims for ultra high-precision mass-ratio measurements of highly charged ions up to uranium, systematic effects for highly charged ions inside the trap tower are considered for the design process as well. Finally, a limit due to remaining anharmonic shifts at large amplitudes is estimated for the resulting geometry, which is important for phase-sensitive measurements of the reduced cyclotron frequency of the ions. |
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