Quantum radiation reaction in aligned crystals beyond the local constant field approximation
We report on experimental spectra of photons radiated by 50-GeV positrons crossing silicon single crystals of thicknesses 1.1, 2.0, 4.2, and 6.2 mm at sufficiently small angles to the (110) planes that their motion effectively is governed by the continuum crystal potential. The experiment covers a r...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2019-10-01
|
| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.1.033014 |
| _version_ | 1797211678592466944 |
|---|---|
| author | T. N. Wistisen A. Di Piazza C. F. Nielsen A. H. Sørensen U. I. Uggerhøj |
| author_facet | T. N. Wistisen A. Di Piazza C. F. Nielsen A. H. Sørensen U. I. Uggerhøj |
| author_sort | T. N. Wistisen |
| collection | DOAJ |
| description | We report on experimental spectra of photons radiated by 50-GeV positrons crossing silicon single crystals of thicknesses 1.1, 2.0, 4.2, and 6.2 mm at sufficiently small angles to the (110) planes that their motion effectively is governed by the continuum crystal potential. The experiment covers a regime of interaction where each positron emits several hard photons, whose recoils are not negligible and which are formed on lengths where the variation of the crystal field cannot be ignored. As a result, neither the single-photon semiclassical theory of Baier et al. nor the conventional cascade approach to multiple hard photon emissions (quantum radiation reaction) based on the local constant field approximation are able to reproduce the experimental results. After developing a theoretical scheme which incorporates the essential physical features of the experiments, i.e., multiple emissions, photon recoil, and background field variation within the radiation formation length, we show that it provides results in convincing agreement with the data. |
| first_indexed | 2024-04-24T10:30:19Z |
| format | Article |
| id | doaj.art-7a31c518bc53476aabdd182ff47b019c |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:30:19Z |
| publishDate | 2019-10-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-7a31c518bc53476aabdd182ff47b019c2024-04-12T16:46:01ZengAmerican Physical SocietyPhysical Review Research2643-15642019-10-011303301410.1103/PhysRevResearch.1.033014Quantum radiation reaction in aligned crystals beyond the local constant field approximationT. N. WistisenA. Di PiazzaC. F. NielsenA. H. SørensenU. I. UggerhøjWe report on experimental spectra of photons radiated by 50-GeV positrons crossing silicon single crystals of thicknesses 1.1, 2.0, 4.2, and 6.2 mm at sufficiently small angles to the (110) planes that their motion effectively is governed by the continuum crystal potential. The experiment covers a regime of interaction where each positron emits several hard photons, whose recoils are not negligible and which are formed on lengths where the variation of the crystal field cannot be ignored. As a result, neither the single-photon semiclassical theory of Baier et al. nor the conventional cascade approach to multiple hard photon emissions (quantum radiation reaction) based on the local constant field approximation are able to reproduce the experimental results. After developing a theoretical scheme which incorporates the essential physical features of the experiments, i.e., multiple emissions, photon recoil, and background field variation within the radiation formation length, we show that it provides results in convincing agreement with the data.http://doi.org/10.1103/PhysRevResearch.1.033014 |
| spellingShingle | T. N. Wistisen A. Di Piazza C. F. Nielsen A. H. Sørensen U. I. Uggerhøj Quantum radiation reaction in aligned crystals beyond the local constant field approximation Physical Review Research |
| title | Quantum radiation reaction in aligned crystals beyond the local constant field approximation |
| title_full | Quantum radiation reaction in aligned crystals beyond the local constant field approximation |
| title_fullStr | Quantum radiation reaction in aligned crystals beyond the local constant field approximation |
| title_full_unstemmed | Quantum radiation reaction in aligned crystals beyond the local constant field approximation |
| title_short | Quantum radiation reaction in aligned crystals beyond the local constant field approximation |
| title_sort | quantum radiation reaction in aligned crystals beyond the local constant field approximation |
| url | http://doi.org/10.1103/PhysRevResearch.1.033014 |
| work_keys_str_mv | AT tnwistisen quantumradiationreactioninalignedcrystalsbeyondthelocalconstantfieldapproximation AT adipiazza quantumradiationreactioninalignedcrystalsbeyondthelocalconstantfieldapproximation AT cfnielsen quantumradiationreactioninalignedcrystalsbeyondthelocalconstantfieldapproximation AT ahsørensen quantumradiationreactioninalignedcrystalsbeyondthelocalconstantfieldapproximation AT uiuggerhøj quantumradiationreactioninalignedcrystalsbeyondthelocalconstantfieldapproximation |