Compact high energy x-ray spectrometer based on forward Compton scattering for high intensity laser plasma experiments

0501825 - FZÚ 2019 RIV US eng J - Článek v odborném periodiku
Singh, Sushil K. - Versaci, Roberto - Garcia, A.L. - Morejon, Hernandez Leonel R. - Ferrari, A. - Molodtsova, M. - Schwengner, R. - Batheja, Deepak Kumar - Cowan, T.
Compact high energy x-ray spectrometer based on forward Compton scattering for high intensity laser plasma experiments.
Review of Scientific Instruments. Roč. 89, č. 8 (2018), s. 1-8, č. článku 085118. ISSN 0034-6748. E-ISSN 1089-7623
Grant CEP: GA MŠMT LQ1606
Institucionální podpora: RVO:68378271
Klíčová slova: electron * photon * petawatt * facility * beam
Obor OECD: Fluids and plasma physics (including surface physics)
Impakt faktor: 1.587, rok: 2018

This article describes the design and presents recent results from testing and calibration of a forward Compton scattering high energy X-ray spectrometer. The calibration was performed using a bremsstrahlung source on the photon scattering facility at the gamma Electron linac for beams with high brilliance and low emittance accelerator at Helmholtz-Zentrum Dresden-Rossendorf, which provides high energy X-ray photons with energies up to 18 MeV. The calibration was conducted at different bremsstrahlung end point energies-10.5, 13, 15, and 18 MeV. Experimental spectra show a systematic increase in the maximum energy, photon temperature, and flux. The spectrometer is effective for an energy range of 4-20 MeV with 20% - 30% energy resolution. The spectrometer operates in low vacuum with pressure less than 0.1 mbar. Experimental tests showed that operating such a spectrometer in air causes a spuriously enhanced high energy signal due to Compton scattering of photons within air.
Trvalý link: http://hdl.handle.net/11104/0293804