Advanced accelerator concepts
for future accelerators
Mariya Arsentyeva
Budker Institute of Nuclear Physics
Novosibirsk, Russia

Outline• Review of existing concepts and facilities• Novel accelerator techniques• Plasma wakefield acceleration (PWFA)• Dielectric accelerating structures• Metallic millimeter wavelength accelerating structures• Conclusion

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Existing facilities and achieved energies
Limitations• Accelerating structure breakdown• Radiation losses in lepton machines• Magnetic field limitation in circular machines• Lack of space for linear accelerators

Updated Livingston curve [1]19.08.2021

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Advanced accelerator concepts

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4Advanced accelerator concepts

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Advanced accelerator concepts for future accelerators

5Advanced accelerator concepts

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Advanced accelerator concepts for future accelerators

6Plasma wakefield acceleration (PWFA)

Relativistic drivers:• Electron beam (FACET II, SLAC) – Ez≈150 GeV/m• Proton beam (AWAKE, CERN) – Ez≈0.2 GeV/m• Laser pulse (numerous) – Ez≈300 GeV/m
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Dielectric structures
Accelerating gradient – 1.3 GeV/m

Cutaway view with the dielectric (grey)
and metal cladding in copper. The beam
(dark red) travels along the structure in thevacuum region, leaving an accelerating
longitudinal wakefield(colour intensity map, red to blue) [2]19.08.2021

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Metallic millimeter wavelength
accelerating structures

12 GHz accelerating structure forCompact Linear Collider (CLIC), CERN
Accelerating gradient – 100 MeV/m [3]140 GHz accelerating structure at SLAC
Accelerating gradient – 300 MeV/m [4]19.08.2021

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Metallic millimeter wavelength acceleratingstructures at BINPFirst prototype at BINP, frequency of 96 GHz
Experimental accelerator gradient will dependon the exiting beam parameters [5]19.08.2021

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Conclusion• Conventional accelerator techniques are close to their limit, there isneed in novel accelerator techniques• Promising advanced concepts (plasma wakefield acceleration, bothbeam or laser driven): challenge of the usable beam quality• Metallic millimeter wavelength accelerating structures: limitations
related to fabrication tolerances

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Advanced accelerator concepts for future accelerators

11References
1. W. A. Barletta and others, Planning the Future of U.S. Particle Physics (Snowmass 2013): Chapter 6:
Accelerator Capabilities, in Community Summer Study 2013: Snowmass on the Mississippi, (2014).

2. B. D. O’Shea, G. Andonian, S. K. Barber, K. L. Fitzmorris, S. Hakimi, J. Harrison, P. D. Hoang, M. J. Hogan, B.
Naranjo, et al., Observation of acceleration and deceleration in gigaelectron-volt-per-metre gradientdielectric wakefield accelerators, Nat Commun 7, (2016) 12763.
3. K. Sjøbæk, Avoiding vacuum arcs in high gradient normal conducting RF structures, Unpublished, (2016).
4. M. Dal Forno, V. Dolgashev, G. Bowden, C. Clarke, M. Hogan, D. McCormick, A. Novokhatski, B. Spataro, S.
Weathersby, et al., rf breakdown tests of mm-wave metallic accelerating structures, Phys. Rev. Accel. Beams
19, (2016) 011301.

5. M. V. Arsentyeva, A. M. Barnyakov, A. E. Levichev and D. A. Nikiforov, Development of the Millimeter-Wave
Accelerating Structure, Phys. Part. Nuclei Lett. 16, (2019) 885.
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