Plasma wakefield acceleration, either driven by ultra-short laser pulses or electron bunches, represents one of the most promising techniques able to overcome the limits of conventional RF technology and allows the development of compact accelerators. In the particle beam-driven scenario, ultra-short bunches with tiny spot sizes are required to enhance the accelerating gradient and preserve the emittance and energy spread of the accelerated bunch. To achieve such tight transverse beam sizes, a focusing system with short focal length is mandatory. Here we discuss the development of a compact and tunable system consisting of three small-bore permanent-magnet quadrupoles with 520 T/m field gradient. The device has been designed in view of the plasma acceleration experiments planned at the SPARC_LAB test-facility. Being the field gradient fixed, the focusing is adjusted by tuning the relative position of the three magnets with nanometer resolution. Details about its magnetic design, beam-dynamics simulations, and preliminary results are examined in the paper.
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March 2018
Research Article|
March 28 2018
Compact and tunable focusing device for plasma wakefield acceleration
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R. Pompili
;
R. Pompili
a)
1
Laboratori Nazionali di Frascati
, Via Enrico Fermi 40, 00044 Frascati, Italy
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M. P. Anania;
M. P. Anania
1
Laboratori Nazionali di Frascati
, Via Enrico Fermi 40, 00044 Frascati, Italy
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E. Chiadroni
;
E. Chiadroni
1
Laboratori Nazionali di Frascati
, Via Enrico Fermi 40, 00044 Frascati, Italy
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A. Cianchi;
A. Cianchi
2
University of Rome Tor Vergata and INFN
, 00133 Rome, Italy
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M. Ferrario;
M. Ferrario
1
Laboratori Nazionali di Frascati
, Via Enrico Fermi 40, 00044 Frascati, Italy
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V. Lollo;
V. Lollo
1
Laboratori Nazionali di Frascati
, Via Enrico Fermi 40, 00044 Frascati, Italy
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A. Notargiacomo;
A. Notargiacomo
3
Institute for Photonics and Nanotechnology–CNR
, 00156 Rome, Italy
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L. Picardi;
L. Picardi
4
ENEA
, Via Enrico Fermi, 00044 Frascati, Rome, Italy
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C. Ronsivalle;
C. Ronsivalle
4
ENEA
, Via Enrico Fermi, 00044 Frascati, Rome, Italy
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J. B. Rosenzweig;
J. B. Rosenzweig
5
UCLA Department of Physics and Astronomy
, 405 Hilgard Avenue, Los Angeles, California 90095, USA
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V. Shpakov;
V. Shpakov
1
Laboratori Nazionali di Frascati
, Via Enrico Fermi 40, 00044 Frascati, Italy
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A. Vannozzi
A. Vannozzi
1
Laboratori Nazionali di Frascati
, Via Enrico Fermi 40, 00044 Frascati, Italy
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R. Pompili
1,a)
M. P. Anania
1
E. Chiadroni
1
A. Cianchi
2
M. Ferrario
1
V. Lollo
1
A. Notargiacomo
3
L. Picardi
4
C. Ronsivalle
4
J. B. Rosenzweig
5
V. Shpakov
1
A. Vannozzi
1
1
Laboratori Nazionali di Frascati
, Via Enrico Fermi 40, 00044 Frascati, Italy
2
University of Rome Tor Vergata and INFN
, 00133 Rome, Italy
3
Institute for Photonics and Nanotechnology–CNR
, 00156 Rome, Italy
4
ENEA
, Via Enrico Fermi, 00044 Frascati, Rome, Italy
5
UCLA Department of Physics and Astronomy
, 405 Hilgard Avenue, Los Angeles, California 90095, USA
Rev. Sci. Instrum. 89, 033302 (2018)
Article history
Received:
September 22 2017
Accepted:
March 02 2018
Citation
R. Pompili, M. P. Anania, E. Chiadroni, A. Cianchi, M. Ferrario, V. Lollo, A. Notargiacomo, L. Picardi, C. Ronsivalle, J. B. Rosenzweig, V. Shpakov, A. Vannozzi; Compact and tunable focusing device for plasma wakefield acceleration. Rev. Sci. Instrum. 1 March 2018; 89 (3): 033302. https://doi.org/10.1063/1.5006134
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