Characterization of laser-driven single and double electron bunches with a permanent magnet quadrupole triplet and pepper-pot mask
Manahan, Grace and Brunetti, Enrico and Aniculaesei, Constantin and Anania, Maria Pia and Cipiccia, Silvia and Islam, Mohammad and Grant, David William and Subiel, Anna and Shanks, Richard and Issac, Riju and Welsh, Gregor H. and Wiggins, Mark and Jaroszynski, Dino (2014) Characterization of laser-driven single and double electron bunches with a permanent magnet quadrupole triplet and pepper-pot mask. New Journal of Physics, 16 (10). 103006. ISSN 1367-2630 (https://doi.org/10.1088/1367-2630/16/10/103006)
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Abstract
Electron beams from laser-plasma wakefield accelerators have low transverse emittance, comparable to those from conventional radio frequency accelerators, which highlights their potential for applications, many of which will require the use of quadrupole magnets for optimal electron beam transport. We report on characterizing electron bunches where double bunches are observed under certain conditions. In particular, we present pepper-pot measurements of the transverse emittance of 120-200 MeV laser wakefield electron bunches after propagation through a triplet of permanent quadrupole magnets. It is shown that the normalized emittance at source can be as low as 1 π mm mrad (resolution limited), growing by about five times after propagation through the quadrupoles due to beam energy spread. The inherent energy-dependence of the magnets also enables detection of double electron bunches that could otherwise remain unresolved, providing insight into the self-injection of multiple bunches. The combination of quadrupoles and pepper-pot, in addition, acts as a diagnostic for the alignment of the magnetic triplet.
ORCID iDs
Manahan, Grace ORCID: https://orcid.org/0000-0001-5570-3238, Brunetti, Enrico ORCID: https://orcid.org/0000-0001-8302-9762, Aniculaesei, Constantin, Anania, Maria Pia, Cipiccia, Silvia, Islam, Mohammad, Grant, David William ORCID: https://orcid.org/0000-0002-1868-2850, Subiel, Anna, Shanks, Richard, Issac, Riju, Welsh, Gregor H. ORCID: https://orcid.org/0000-0001-7933-4190, Wiggins, Mark ORCID: https://orcid.org/0000-0001-7804-6146 and Jaroszynski, Dino ORCID: https://orcid.org/0000-0002-3006-5492;-
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Item type: Article ID code: 49540 Dates: DateEvent7 October 2014Published5 September 2014AcceptedSubjects: Science > Physics Department: Faculty of Science > Physics
Technology and Innovation Centre > Advanced Science and TechnologyDepositing user: Pure Administrator Date deposited: 03 Oct 2014 10:39 Last modified: 05 Dec 2024 01:10 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/49540