NDLI: Time-of-flight detector for the characterisation of laser-accelerated protons

Content Provider	IEEE Xplore Digital Library
Author	Seimetz, M. Bellido, P. Soriano, A. Huertas, C. Garcia Lopez, J. Jimenez-Ramos, M.C. Fernandez, B. Conde, P. Crespo, E. Gonzalez, A.J. Hernandez, L. Iborra, A. Martos, F. Moliner, L. Rigla, J.P. Rodriguez-Alvarez, M.J. Sanchez, F. Vidal, L.F. Benlloch, J.M.
Copyright Year	2013
Description	Author affiliation: Inst. de Instrumentacion para Imagen Mol. (I3M), Univ. Politec. de Valencia, Valencia, Spain (Seimetz, M.; Bellido, P.; Soriano, A.; Huertas, C.; Conde, P.; Crespo, E.; Gonzalez, A.J.; Hernandez, L.; Iborra, A.; Martos, F.; Moliner, L.; Rigla, J.P.; Rodriguez-Alvarez, M.J.; Sanchez, F.; Vidal, L.F.; Benlloch, J.M.) \|\| Centro Nac. de Aceleradores (CNA), Sevilla, Spain (Garcia Lopez, J.; Jimenez-Ramos, M.C.; Fernandez, B.)
Abstract	Lasers of ultra-high intensity focused on thin targets can form plasmas and release large numbers of charged particles with kinetic energies in the MeV region. The characterization of the accelerated particles requires suitable detectors. We present a time-of-flight detector based on a plastic scintillator optimized for the spectral analysis of laser-accelerated protons. All details of the detector layout are adapted to the expected properties of the proton beam. Particle energies will be separated by the time-of-flight technique over 200 cm path length. The active area (25 mm width) corresponds to a few mrad opening angle. With 5 mm thickness the detector is capable of absorbing protons up to 22.5 MeV. A very thin, aluminized mylar foil shields the scintillator from outer light while absorbing very little particle energy. The scintillation photons are measured with a photomultiplier tube coupled through a bundle of optical fibres. The coupling of these fibres via a PMMA light guide has been previously optimized in simulations with Litrani. A critical aspect of the detection of virtually large numbers of protons emitted in femtosecond pulses is the saturation of the PMT. The latter can be avoided by use of appropriate optical filters. With these the effective dynamic range starts from single particles over several orders of magnitude. Our time-of-flight detector has been calibrated at the Spanish National Accelerator Centre at Sevilla. Proton beams from 0.46 to 5.6 MeV from a tandem accelerator have been used to measure the relation between particle energy and pulse heights. Further tests have been performed with a pulsed electron beam to simulate many-particle hits.
Starting Page	1
Ending Page	4
File Size	315207
Page Count	4
File Format	PDF
e-ISBN	9781479905348
DOI	10.1109/NSSMIC.2013.6829804
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-10-27
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Protons Detectors Lasers Optical pulses Optical saturation Oscilloscopes Optical coupling
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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