[BTeam] Probing the diffusive behaviour of beam-halo dynamics in circular accelerators

[Todd Satogata]

Thanks, Jay -- great to see that they cite some of my dissertation
work on halo diffusion modeling and characterization from the 90's.
I'll have a deeper read and reach out to Massimo, particularly if
it looks like they have a new interpretation of Nekhoroshev, though
at first glance their parameterization looks pretty standard.

                                                 -Todd

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Todd Satogata
Director, Center for Advanced Studies of Accelerators
Jefferson Lab
12000 Jefferson Avenue
Newport News, VA 23606
Cell: (631) 807-0674
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On 2/23/22 7:37 AM, Jay Benesch wrote:
> perhaps of interest to those working on EIC
> 
> https://arxiv.org/abs/2202.10050
> 
> Probing the diffusive behaviour of beam-halo dynamics in circular accelerators
> C. E. Montanari, A. Bazzani, M. Giovannozzi
> 
>      Circular particle accelerators at the energy frontier are based on superconducting magnets that are extremely sensitive to beam losses as these might induce quenches, i.e.\ transitions to the normal-conducting state. Furthermore, the energy stored in the circulating beam is so large that hardware integrity is put in serious danger, and machine protection becomes essential for reaching the nominal accelerator performance. In this challenging context, the beam halo becomes a potential source of performance limitations and its dynamics needs to be understood in detail to assess whether it could be an issue for the accelerator. In this paper, we discuss in detail a novel framework, based on a diffusive approach, to model beam-halo dynamics. The functional form of the optimal estimate of the perturbative series, as given by Nekhoroshev's theorem, is used to provide the functional form of the action diffusion coefficient. The goal is to propose an effective model for the beam-!
>   halo dynamics and to devise an efficient experimental procedure to obtain an accurate measurement of the diffusion coefficient.
> 
> Subjects: 	Accelerator Physics (physics.acc-ph)
> Cite as: 	arXiv:2202.10050 [physics.acc-ph]
> 
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