Positron production by X rays emitted by Betatron motion in a plasma wiggler

D. K. Johnson; D. Auerbach; I. Blumenfeld; C. D. Barnes; C. E. Clayton; F. J. Decker; S. Deng; P. Emma; M. J. Hogan; C. Huang; R. Ischebeck; R. Iverson; C. Joshi; T. C. Katsouleas; N. Kirby; P. Krejcik; W. Lu; K. A. Marsh; W. B. Mori; P. Muggli; C. L. O'Connell; E. Oz; R. H. Siemann; D. Walz; M. Zhou

doi:10.1103/PhysRevLett.97.175003

Positron production by X rays emitted by Betatron motion in a plasma wiggler

D. K. Johnson, D. Auerbach, I. Blumenfeld, C. D. Barnes, C. E. Clayton, F. J. Decker, S. Deng, P. Emma, M. J. Hogan, C. Huang, R. Ischebeck, R. Iverson, C. Joshi, T. C. Katsouleas, N. Kirby, P. Krejcik, W. Lu, K. A. Marsh, W. B. Mori, P. MuggliC. L. O'Connell, E. Oz, R. H. Siemann, D. Walz, M. Zhou

Research output: Contribution to journal › Article › peer-review

36 Scopus citations

Abstract

Positrons in the energy range of 3-30 MeV, produced by x rays emitted by betatron motion in a plasma wiggler of 28.5 GeV electrons from the SLAC accelerator, have been measured. The extremely high-strength plasma wiggler is an ion column induced by the electron beam as it propagates through and ionizes dense lithium vapor. X rays in the range of 1-50 MeV in a forward cone angle of 0.1 mrad collide with a 1.7 mm thick tungsten target to produce electron-positron pairs. The positron spectra are found to be strongly influenced by the plasma density and length as well as the electron bunch length. By characterizing the beam propagation in the ion column these influences are quantified and result in excellent agreement between the measured and calculated positron spectra.

Original language	English (US)
Article number	175003
Journal	Physical Review Letters
Volume	97
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevLett.97.175003
State	Published - 2006
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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Johnson, D. K., Auerbach, D., Blumenfeld, I., Barnes, C. D., Clayton, C. E., Decker, F. J., Deng, S., Emma, P., Hogan, M. J., Huang, C., Ischebeck, R., Iverson, R., Joshi, C., Katsouleas, T. C., Kirby, N., Krejcik, P., Lu, W., Marsh, K. A., Mori, W. B., ... Zhou, M. (2006). Positron production by X rays emitted by Betatron motion in a plasma wiggler. Physical Review Letters, 97(17), Article 175003. https://doi.org/10.1103/PhysRevLett.97.175003

Johnson, DK, Auerbach, D, Blumenfeld, I, Barnes, CD, Clayton, CE, Decker, FJ, Deng, S, Emma, P, Hogan, MJ, Huang, C, Ischebeck, R, Iverson, R, Joshi, C, Katsouleas, TC, Kirby, N, Krejcik, P, Lu, W, Marsh, KA, Mori, WB, Muggli, P, O'Connell, CL, Oz, E, Siemann, RH, Walz, D & Zhou, M 2006, 'Positron production by X rays emitted by Betatron motion in a plasma wiggler', Physical Review Letters, vol. 97, no. 17, 175003. https://doi.org/10.1103/PhysRevLett.97.175003

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title = "Positron production by X rays emitted by Betatron motion in a plasma wiggler",

abstract = "Positrons in the energy range of 3-30 MeV, produced by x rays emitted by betatron motion in a plasma wiggler of 28.5 GeV electrons from the SLAC accelerator, have been measured. The extremely high-strength plasma wiggler is an ion column induced by the electron beam as it propagates through and ionizes dense lithium vapor. X rays in the range of 1-50 MeV in a forward cone angle of 0.1 mrad collide with a 1.7 mm thick tungsten target to produce electron-positron pairs. The positron spectra are found to be strongly influenced by the plasma density and length as well as the electron bunch length. By characterizing the beam propagation in the ion column these influences are quantified and result in excellent agreement between the measured and calculated positron spectra.",

author = "Johnson, {D. K.} and D. Auerbach and I. Blumenfeld and Barnes, {C. D.} and Clayton, {C. E.} and Decker, {F. J.} and S. Deng and P. Emma and Hogan, {M. J.} and C. Huang and R. Ischebeck and R. Iverson and C. Joshi and Katsouleas, {T. C.} and N. Kirby and P. Krejcik and W. Lu and Marsh, {K. A.} and Mori, {W. B.} and P. Muggli and O'Connell, {C. L.} and E. Oz and Siemann, {R. H.} and D. Walz and M. Zhou",

year = "2006",

doi = "10.1103/PhysRevLett.97.175003",

language = "English (US)",

volume = "97",

journal = "Physical Review Letters",

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T1 - Positron production by X rays emitted by Betatron motion in a plasma wiggler

AU - Johnson, D. K.

AU - Auerbach, D.

AU - Blumenfeld, I.

AU - Barnes, C. D.

AU - Clayton, C. E.

AU - Decker, F. J.

AU - Deng, S.

AU - Emma, P.

AU - Hogan, M. J.

AU - Huang, C.

AU - Ischebeck, R.

AU - Iverson, R.

AU - Joshi, C.

AU - Katsouleas, T. C.

AU - Kirby, N.

AU - Krejcik, P.

AU - Lu, W.

AU - Marsh, K. A.

AU - Mori, W. B.

AU - Muggli, P.

AU - O'Connell, C. L.

AU - Oz, E.

AU - Siemann, R. H.

AU - Walz, D.

AU - Zhou, M.

PY - 2006

Y1 - 2006

N2 - Positrons in the energy range of 3-30 MeV, produced by x rays emitted by betatron motion in a plasma wiggler of 28.5 GeV electrons from the SLAC accelerator, have been measured. The extremely high-strength plasma wiggler is an ion column induced by the electron beam as it propagates through and ionizes dense lithium vapor. X rays in the range of 1-50 MeV in a forward cone angle of 0.1 mrad collide with a 1.7 mm thick tungsten target to produce electron-positron pairs. The positron spectra are found to be strongly influenced by the plasma density and length as well as the electron bunch length. By characterizing the beam propagation in the ion column these influences are quantified and result in excellent agreement between the measured and calculated positron spectra.

AB - Positrons in the energy range of 3-30 MeV, produced by x rays emitted by betatron motion in a plasma wiggler of 28.5 GeV electrons from the SLAC accelerator, have been measured. The extremely high-strength plasma wiggler is an ion column induced by the electron beam as it propagates through and ionizes dense lithium vapor. X rays in the range of 1-50 MeV in a forward cone angle of 0.1 mrad collide with a 1.7 mm thick tungsten target to produce electron-positron pairs. The positron spectra are found to be strongly influenced by the plasma density and length as well as the electron bunch length. By characterizing the beam propagation in the ion column these influences are quantified and result in excellent agreement between the measured and calculated positron spectra.

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Positron production by X rays emitted by Betatron motion in a plasma wiggler

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