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Calibration and performance tests of detectors for laser-accelerated protons

AuthorsSeimetz, M. ; Bellido Millán, Pablo Jesús ; Soriano, A.; García López, J. ; Jiménez-Ramos, M. C. ; Fernández-Martínez, B. ; Conde, P.; Crespo, E.; González Martínez, Antonio Javier; Hernández Hernández, Liczandro; Iborra, A.; Moliner, L.; Rigla, J. P.; Rodríguez-Álvarez, María José; Sánchez, S. ; Vidal, L. F.; Benlloch Baviera, José María
Issue Date2015
PublisherInstitute of Electrical and Electronics Engineers
CitationIEEE Transactions on Nuclear Science 62(6): 3216-3224 (2015)
AbstractWe present the calibration and performance tests carried out with two detectors for intense proton pulses accelerated by lasers. Most of the procedures were realized with proton beams of 0.46-5.60 MeV from a tandem accelerator. One approach made use of radiochromic films, for which we calibrated the relation between optical density and energy deposition over more than three orders of magnitude. The validity of these results and of our analysis algorithms has been confirmed by controlled irradiation of film stacks and reconstruction of the total beam charge for strongly non-uniform beam profiles. For the spectral analysis of protons from repeated laser shots, we have designed an online monitor based on a plastic scintillator. The resulting signal from a photomultiplier directly measured on a fast oscilloscope is especially useful for time-of-flight applications. Variable optical filters allow for suppression of saturation and an extension of the dynamic range. With pulsed proton beams we have tested the detector response to a wide range of beam intensities from single particles to 3 ×105 protons per 100 ns time interval.
Identifiersdoi: 10.1109/TNS.2015.2480682
issn: 0018-9499
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