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- Title
A compact Paul ion trap for the study of space-charge effects in drift-tube linear accelerators.
- Authors
Okamoto, Hiromi; Kojima, Kunihiro; Ito, Kiyokazu
- Abstract
Starting from the principle of least action, we derive a general Hamiltonian that describes the collective motion of an intense charged-particle bunch in a drift-tube linear accelerator. The Alvarez-type structure is assumed as an example, but the present theory can readily be extended to other types of conventional linacs. A Hamiltonian formalism of non-neutral plasma in a linear Paul trap is also constructed, which demonstrates clear similarity between the linac system and compact ion-trap system. The physical equivalence between these two dynamical systems can be employed to perform a fundamental design study of high-intensity hadron linacs in a local tabletop environment. For the tabletop experiment on space-charge effects in short proton and heavy-ion bunches, we have designed an ion trap whose overall dimension is less than 10 cm axially and whose aperture size is 1 cm in diameter. The new trap is introduced in the S-POD (Simulator of Particle Orbit Dynamics) apparatus developed at Hiroshima University for "Laboratory Accelerator Physics."
- Subjects
PRINCIPLE of least action; ELECTRON linac; HAMILTON'S principle function; HADRONS; ION traps
- Publication
Progress of Theoretical & Experimental Physics: PTEP, 2019, Vol 2019, Issue 9, pN.PAG
- ISSN
2050-3911
- Publication type
Article