Calibration of the low-energy channel Thomson parabola of the LMJ-PETAL diagnostic SEPAGE with protons and carbon ions

The Review of Scientific Instruments
J-E DucretB Vauzour

Abstract

The SEPAGE diagnostic will detect charged particles (electrons, protons, and ions) accelerated in the interaction of the PETAL (PETawatt Aquitaine Laser) laser with its targets on the LMJ (Laser MegaJoule)-PETAL laser facility. SEPAGE will be equipped with a proton-radiography front detector and two Thomson parabolas (TP), corresponding to different ranges of the particle energy spectra: Above 0.1 MeV for electrons and protons in the low-energy channel, with a separation capability between protons and12C6+up to 20 MeV proton energy and above 8 MeV for the high-energy channel, with a separation capability between protons and12C6+up to 200 MeV proton kinetic energy. This paper presents the calibration of the SEPAGE's low-energy channel TP at the Tandem facility of Orsay (France) with proton beams between 3 and 22 MeV and carbon-ion beams from 5.8 to 84 MeV. The magnetic and electric fields' integrals were determined with an accuracy of 10-3by combining the deflections measured at different energies with different target thicknesses and materials, providing different in-target energy losses of the beam particles and hence different detected energies for given beam energies.

References

Oct 1, 1978·The Review of Scientific Instruments·D C Slater
Feb 2, 2011·The Review of Scientific Instruments·D JungB M Hegelich
Dec 2, 2011·The Review of Scientific Instruments·J A CobbleN Sinenian
Apr 3, 2014·The Review of Scientific Instruments·D GwynneM Borghesi
Dec 3, 2015·The Review of Scientific Instruments·G BoutouxI Thfoin
Jun 3, 2016·The Review of Scientific Instruments·N RabhiI Thfoin
Sep 3, 2016·The Review of Scientific Instruments·A AlejoM Borghesi
Dec 3, 2017·The Review of Scientific Instruments·N RabhiB Vauzour

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