Recent advances in the physics of collective excitations in the Paul trap simulator experiment

✍ Scribed by E.P. Gilson; M. Chung; R.C. Davidson; M. Dorf; P.C. Efthimion; A.B. Godbehere; R. Majeski

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 322 KB
• Volume: 606
• Category: Article
• ISSN: 0168-9002
• DOI: 10.1016/j.nima.2009.03.078

✦ Synopsis

The Paul trap simulator experiment (PTSX) is a compact laboratory linear Paul trap that simulates the transverse dynamics of a long charged-particle bunch propagating through a magnetic alternatinggradient (AG) transport system. The transverse dynamics of particles in the AG system in the beam's frame-of-reference and those of particles in PTSX are described by the same sets of equations, including all nonlinear space-charge effects. Initial experimental results are presented in which the collective transverse symmetric mode (m ¼ 0) and quadrupole mode (m ¼ 2) have been observed in pure-bariumion plasmas in PTSX, with a depressed-tune n=n 0 $0:9, with the intent of identifying collective modes whose signature will serve as a robust diagnostic for key properties of the beam, such as line density and transverse emittance. The results of particle-in-cell simulations performed with the WARP code are compared to the experimental data.