Laser excitation of the n=3 level of positronium for antihydrogen production

S. Aghion; C. Amsler; A. Ariga; T. Ariga; G. Bonomi; P. Bräunig; J. Bremer; R. S. Brusa; L. Cabaret; M. Caccia; R. Caravita; F. Castelli; G. Cerchiari; K. Chlouba; S. Cialdi; D. Comparat; G. Consolati; A. Demetrio; L. Di Noto; M. Doser; A. Dudarev; A. Ereditato; C. Evans; R. Ferragut; J. Fesel; A. Fontana; O. K. Forslund; S. Gerber; M. Giammarchi; A. Gligorova; S. Gninenko; F. Guatieri; S. Haider; H. Holmestad; T. Huse; I. L. Jernelv; E. Jordan; A. Kellerbauer; M. Kimura; T. Koettig; D. Krasnicky; V. Lagomarsino; P. Lansonneur; P. Lebrun; S. Lehner; J. Liberadzka; C. Malbrunot; S. Mariazzi; L. Marx; V. Matveev; AEgIS Collaboration

doi:10.1103/PhysRevA.94.012507

Laser excitation of the n=3 level of positronium for antihydrogen production

S. Aghion, C. Amsler, A. Ariga, T. Ariga, G. Bonomi, P. Bräunig, J. Bremer, R. S. Brusa, L. Cabaret, M. Caccia, R. Caravita, F. Castelli, G. Cerchiari, K. Chlouba, S. Cialdi, D. Comparat, G. Consolati, A. Demetrio, L. Di Noto, M. DoserA. Dudarev, A. Ereditato, C. Evans, R. Ferragut, J. Fesel, A. Fontana, O. K. Forslund, S. Gerber, M. Giammarchi, A. Gligorova, S. Gninenko, F. Guatieri, S. Haider, H. Holmestad, T. Huse, I. L. Jernelv, E. Jordan, A. Kellerbauer, M. Kimura, T. Koettig, D. Krasnicky, V. Lagomarsino, P. Lansonneur, P. Lebrun, S. Lehner, J. Liberadzka, C. Malbrunot, S. Mariazzi, L. Marx, V. Matveev, AEgIS Collaboration

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

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Abstract

We demonstrate the laser excitation of the n=3 state of positronium (Ps) in vacuum. A combination of a specially designed pulsed slow positron beam and a high-efficiency converter target was used to produce Ps. Its annihilation was recorded by single-shot positronium annihilation lifetime spectroscopy. Pulsed laser excitation of the n=3 level at a wavelength λ≈205 nm was monitored via Ps photoionization induced by a second intense laser pulse at λ=1064 nm. About 15% of the overall positronium emitted into vacuum was excited to n=3 and photoionized. Saturation of both the n=3 excitation and the following photoionization was observed and explained by a simple rate equation model. The positronium's transverse temperature was extracted by measuring the width of the Doppler-broadened absorption line. Moreover, excitation to Rydberg states n=15 and 16 using n=3 as the intermediate level was observed, giving an independent confirmation of excitation to the 3P3 state.

Original language	English
Article number	012507
Journal	Physical Review A
Volume	94
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevA.94.012507
Publication status	Published - Jul 7 2016
Externally published	Yes

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

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10.1103/PhysRevA.94.012507

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Aghion, S., Amsler, C., Ariga, A., Ariga, T., Bonomi, G., Bräunig, P., Bremer, J., Brusa, R. S., Cabaret, L., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Chlouba, K., Cialdi, S., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., ... AEgIS Collaboration (2016). Laser excitation of the n=3 level of positronium for antihydrogen production. Physical Review A, 94(1), [012507]. https://doi.org/10.1103/PhysRevA.94.012507

Aghion, S, Amsler, C, Ariga, A, Ariga, T, Bonomi, G, Bräunig, P, Bremer, J, Brusa, RS, Cabaret, L, Caccia, M, Caravita, R, Castelli, F, Cerchiari, G, Chlouba, K, Cialdi, S, Comparat, D, Consolati, G, Demetrio, A, Di Noto, L, Doser, M, Dudarev, A, Ereditato, A, Evans, C, Ferragut, R, Fesel, J, Fontana, A, Forslund, OK, Gerber, S, Giammarchi, M, Gligorova, A, Gninenko, S, Guatieri, F, Haider, S, Holmestad, H, Huse, T, Jernelv, IL, Jordan, E, Kellerbauer, A, Kimura, M, Koettig, T, Krasnicky, D, Lagomarsino, V, Lansonneur, P, Lebrun, P, Lehner, S, Liberadzka, J, Malbrunot, C, Mariazzi, S, Marx, L, Matveev, V & AEgIS Collaboration 2016, 'Laser excitation of the n=3 level of positronium for antihydrogen production', Physical Review A, vol. 94, no. 1, 012507. https://doi.org/10.1103/PhysRevA.94.012507

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title = "Laser excitation of the n=3 level of positronium for antihydrogen production",

abstract = "We demonstrate the laser excitation of the n=3 state of positronium (Ps) in vacuum. A combination of a specially designed pulsed slow positron beam and a high-efficiency converter target was used to produce Ps. Its annihilation was recorded by single-shot positronium annihilation lifetime spectroscopy. Pulsed laser excitation of the n=3 level at a wavelength λ≈205 nm was monitored via Ps photoionization induced by a second intense laser pulse at λ=1064 nm. About 15% of the overall positronium emitted into vacuum was excited to n=3 and photoionized. Saturation of both the n=3 excitation and the following photoionization was observed and explained by a simple rate equation model. The positronium's transverse temperature was extracted by measuring the width of the Doppler-broadened absorption line. Moreover, excitation to Rydberg states n=15 and 16 using n=3 as the intermediate level was observed, giving an independent confirmation of excitation to the 3P3 state.",

author = "S. Aghion and C. Amsler and A. Ariga and T. Ariga and G. Bonomi and P. Br{\"a}unig and J. Bremer and Brusa, {R. S.} and L. Cabaret and M. Caccia and R. Caravita and F. Castelli and G. Cerchiari and K. Chlouba and S. Cialdi and D. Comparat and G. Consolati and A. Demetrio and {Di Noto}, L. and M. Doser and A. Dudarev and A. Ereditato and C. Evans and R. Ferragut and J. Fesel and A. Fontana and Forslund, {O. K.} and S. Gerber and M. Giammarchi and A. Gligorova and S. Gninenko and F. Guatieri and S. Haider and H. Holmestad and T. Huse and Jernelv, {I. L.} and E. Jordan and A. Kellerbauer and M. Kimura and T. Koettig and D. Krasnicky and V. Lagomarsino and P. Lansonneur and P. Lebrun and S. Lehner and J. Liberadzka and C. Malbrunot and S. Mariazzi and L. Marx and V. Matveev and {AEgIS Collaboration}",

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year = "2016",

month = jul,

day = "7",

doi = "10.1103/PhysRevA.94.012507",

language = "English",

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T1 - Laser excitation of the n=3 level of positronium for antihydrogen production

AU - Aghion, S.

AU - Amsler, C.

AU - Ariga, A.

AU - Ariga, T.

AU - Bonomi, G.

AU - Bräunig, P.

AU - Bremer, J.

AU - Brusa, R. S.

AU - Cabaret, L.

AU - Caccia, M.

AU - Caravita, R.

AU - Castelli, F.

AU - Cerchiari, G.

AU - Chlouba, K.

AU - Cialdi, S.

AU - Comparat, D.

AU - Consolati, G.

AU - Demetrio, A.

AU - Di Noto, L.

AU - Doser, M.

AU - Dudarev, A.

AU - Ereditato, A.

AU - Evans, C.

AU - Ferragut, R.

AU - Fesel, J.

AU - Fontana, A.

AU - Forslund, O. K.

AU - Gerber, S.

AU - Giammarchi, M.

AU - Gligorova, A.

AU - Gninenko, S.

AU - Guatieri, F.

AU - Haider, S.

AU - Holmestad, H.

AU - Huse, T.

AU - Jernelv, I. L.

AU - Jordan, E.

AU - Kellerbauer, A.

AU - Kimura, M.

AU - Koettig, T.

AU - Krasnicky, D.

AU - Lagomarsino, V.

AU - Lansonneur, P.

AU - Lebrun, P.

AU - Lehner, S.

AU - Liberadzka, J.

AU - Malbrunot, C.

AU - Mariazzi, S.

AU - Marx, L.

AU - Matveev, V.

AU - AEgIS Collaboration

PY - 2016/7/7

Y1 - 2016/7/7

N2 - We demonstrate the laser excitation of the n=3 state of positronium (Ps) in vacuum. A combination of a specially designed pulsed slow positron beam and a high-efficiency converter target was used to produce Ps. Its annihilation was recorded by single-shot positronium annihilation lifetime spectroscopy. Pulsed laser excitation of the n=3 level at a wavelength λ≈205 nm was monitored via Ps photoionization induced by a second intense laser pulse at λ=1064 nm. About 15% of the overall positronium emitted into vacuum was excited to n=3 and photoionized. Saturation of both the n=3 excitation and the following photoionization was observed and explained by a simple rate equation model. The positronium's transverse temperature was extracted by measuring the width of the Doppler-broadened absorption line. Moreover, excitation to Rydberg states n=15 and 16 using n=3 as the intermediate level was observed, giving an independent confirmation of excitation to the 3P3 state.

AB - We demonstrate the laser excitation of the n=3 state of positronium (Ps) in vacuum. A combination of a specially designed pulsed slow positron beam and a high-efficiency converter target was used to produce Ps. Its annihilation was recorded by single-shot positronium annihilation lifetime spectroscopy. Pulsed laser excitation of the n=3 level at a wavelength λ≈205 nm was monitored via Ps photoionization induced by a second intense laser pulse at λ=1064 nm. About 15% of the overall positronium emitted into vacuum was excited to n=3 and photoionized. Saturation of both the n=3 excitation and the following photoionization was observed and explained by a simple rate equation model. The positronium's transverse temperature was extracted by measuring the width of the Doppler-broadened absorption line. Moreover, excitation to Rydberg states n=15 and 16 using n=3 as the intermediate level was observed, giving an independent confirmation of excitation to the 3P3 state.

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U2 - 10.1103/PhysRevA.94.012507

DO - 10.1103/PhysRevA.94.012507

M3 - Article

AN - SCOPUS:84978300293

VL - 94

JO - Physical Review A

JF - Physical Review A

SN - 2469-9926

IS - 1

M1 - 012507

ER -

Laser excitation of the n=3 level of positronium for antihydrogen production

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