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The feasibility of gamma-ray light sources based on the channeling phenomenon of ultrarelativistic electrons and positrons in oriented single crystals is demonstrated using rigorous numerical modeling. Case studies are presented for 10 GeV and sub-GeV <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msup><a:mi>e</a:mi><a:mo>−</a:mo></a:msup><a:mo>/</a:mo><a:msup><a:mi>e</a:mi><a:mo>+</a:mo></a:msup></a:math> beams incident on <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mrow><c:msup><c:mrow><c:mn>10</c:mn></c:mrow><c:mrow><c:mo>−</c:mo><c:mn>1</c:mn></c:mrow></c:msup><c:mo>−</c:mo><c:msup><c:mrow><c:mn>10</c:mn></c:mrow><c:mrow><c:mn>0</c:mn></c:mrow></c:msup><c:mtext> </c:mtext><c:mtext> </c:mtext><c:mi>mm</c:mi></c:mrow></c:math> thick diamond and silicon crystals. It is shown that for moderate values of the beam average current (<e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"><e:mo>≲</e:mo><e:mrow><e:mn>10</e:mn><e:mtext> </e:mtext><e:mtext> </e:mtext><e:mi mathvariant="normal">μ</e:mi><e:mi mathvariant="normal">A</e:mi></e:mrow></e:math>), the average photon flux in the energy range of <i:math xmlns:i="http://www.w3.org/1998/Math/MathML" display="inline"><i:msup><i:mn>10</i:mn><i:mn>0</i:mn></i:msup><i:mi>–</i:mi><i:msup><i:mn>10</i:mn><i:mn>2</i:mn></i:msup><i:mtext> </i:mtext><i:mtext> </i:mtext><i:mi>MeV</i:mi></i:math> emitted within the <k:math xmlns:k="http://www.w3.org/1998/Math/MathML" display="inline"><k:mrow><k:msup><k:mrow><k:mn>10</k:mn></k:mrow><k:mrow><k:mn>1</k:mn></k:mrow></k:msup><k:mi>–</k:mi><k:msup><k:mrow><k:mn>10</k:mn></k:mrow><k:mrow><k:mn>3</k:mn></k:mrow></k:msup><k:mtext> </k:mtext><k:mtext> </k:mtext><k:mi mathvariant="normal">μ</k:mi><k:mi>rad</k:mi></k:mrow></k:math> cone and 1% bandwidth can be on the level of <n:math xmlns:n="http://www.w3.org/1998/Math/MathML" display="inline"><n:mrow><n:msup><n:mrow><n:mn>10</n:mn></n:mrow><n:mrow><n:mn>10</n:mn></n:mrow></n:msup><n:mtext> </n:mtext><n:mtext> </n:mtext><n:mi>photon</n:mi><n:mo>/</n:mo><n:mi mathvariant="normal">s</n:mi></n:mrow></n:math> for electrons and <q:math xmlns:q="http://www.w3.org/1998/Math/MathML" display="inline"><q:mrow><q:msup><q:mrow><q:mn>10</q:mn></q:mrow><q:mrow><q:mn>10</q:mn></q:mrow></q:msup><q:mi>–</q:mi><q:msup><q:mrow><q:mn>10</q:mn></q:mrow><q:mrow><q:mn>12</q:mn></q:mrow></q:msup><q:mtext> </q:mtext><q:mtext> </q:mtext><q:mi>photon</q:mi><q:mo>/</q:mo><q:mi mathvariant="normal">s</q:mi></q:mrow></q:math> for positrons. These values are higher than the fluxes available at modern laser-Compton gamma-ray light sources.
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Sushko et al. (2024) studied this question.
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