Gamma-ray detection and generation inside near critical region
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České vysoké učení technické v Praze
Czech Technical University in Prague
Czech Technical University in Prague
Date of defense
2025-09-05
Abstract
V posledních letech interakce laseru s plazmatem vedly k produkci fotonů s rostoucí energií, dosahující nyní až do oblasti GeV. Jedním z perspektivních mechanismů je přímá akcelerace elektronu laserem (Direct Laser Acceleration), která slibuje vysokou účinnost konverze energie laseru na energii fotonů. V této práci byly provedeny simulace metodou Particle-In-Cell (PIC) za účelem nalezení parametrů vhodných pro efektivní generaci fotonů. Současně byl navržen a realizován speciální detektor založený na stohovaných scintilátorech, který umožňuje přesné měření krátkých záblesků vysokoenergetických fotonů až do 200 MeV v experimentech s PW lasery.
In recent years, laserplasma interactions have produced photons with ever-increasing energies, now reaching the GeV scale. One promising mechanism is Direct Laser Acceleration, which offers high conversion efficiency from laser energy to photon energy. In this thesis, particle-in-cell simulations were performed to scan the relevant parameters for efficient photon generation. A dedicated detector based on stacked scintillators was designed and implemented, enabling precise measurements of short bursts of high-energy photons, including the two Co60 photopeaks and photons up to 200 MeV in PW-scale laser experiments.
In recent years, laserplasma interactions have produced photons with ever-increasing energies, now reaching the GeV scale. One promising mechanism is Direct Laser Acceleration, which offers high conversion efficiency from laser energy to photon energy. In this thesis, particle-in-cell simulations were performed to scan the relevant parameters for efficient photon generation. A dedicated detector based on stacked scintillators was designed and implemented, enabling precise measurements of short bursts of high-energy photons, including the two Co60 photopeaks and photons up to 200 MeV in PW-scale laser experiments.
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Vysokoškolská závěrečná práce je dílo chráněné autorským zákonem. Je možné pořizovat z něj na své náklady a pro svoji osobní potřebu výpisy, opisy a rozmnoženiny. Jeho využití musí být v souladu s autorským zákonem v platném znění.
A university thesis is a work protected by the Copyright Act of the Czech Republic. Extracts, copies and transcripts of the thesis are allowed for personal use only and at one`s own expense. The use of thesis should be in compliance with the Copyright Act.
A university thesis is a work protected by the Copyright Act of the Czech Republic. Extracts, copies and transcripts of the thesis are allowed for personal use only and at one`s own expense. The use of thesis should be in compliance with the Copyright Act.