Time-of-flight - Energy spectrometer for elemental depth profiling - Jyväskylä design
Laitinen, M., Rossi, M., Julin, J., & Sajavaara, T. (2014). Time-of-flight - Energy spectrometer for elemental depth profiling - Jyväskylä design. Nuclear instruments and methods in physics research section B: beam interactions with materials and atoms, 337, 55-61. https://doi.org/10.1016/j.nimb.2014.07.001
Published inNuclear instruments and methods in physics research section B: beam interactions with materials and atoms
© 2014 Elsevier B.V. This is an author's final draft version of an article whose final and definitive form has been published by Elsevier. Published in this repository with the kind permission of the publisher.
A new time-of-flight elastic recoil detection spectrometer has been built, and initially the main effort was focused in getting good timing resolution and high detection efficiency for light elements. With the ready system, a 154 ps timing resolution was recorded for scattered 4.8 MeV 4He2+ ions. The hydrogen detection efficiency was from 80% to 20% for energies from 100 keV to 1 MeV, respectively, and this was achieved by having an additional atomic layer deposited Al2O3 coating on the first timing detector’s carbon foil. The data acquisition system utilizes an FPGA-card to time-stamp every time-of-flight and energy event with 25 ns resolution. The different origins of the background events in coincident time-of-flight-energy histograms have been studied and explained. The built system has proved to be able to routinely depth profile films thinner than 10 nm.
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Laitinen, Mikko; Sajavaara, Timo; Rossi, Mikko; Julin, Jaakko; Puurunen, R.L.; Suni, T.; Ishida, T.; Fujita, H.; Arstila, K.; Brijs, B.; Whitlow, Harry (Elsevier, 2011)Atomic layer deposition (ALD) is currently a widespread method to grow conformal thin films with a sub-nm thickness control. By using ALD for nanolaminate oxides, it is possible to fine tune the electrical, optical and ...
Laitinen Mikko (University of Jyväskylä, 2013)
Trajectory bending and energy spreading of charged ions in time-of-flight telescopes used for ion beam analysis Laitinen, Mikko; Sajavaara, Timo (Elsevier BV, 2014)Carbon foil time pick-up detectors are widely used in pairs in ion beam applications as time-of-flight detectors. These detectors are suitable for a wide energy range and for all ions but at the lowest energies the tandem ...
Julin, Jaakko; Sajavaara, Timo (Elsevier BV, 2016)A versatile system to capture and analyze signals from multi channel plate (MCP) based time-of-flight detectors and ionization based energy detectors such as silicon diodes and gas ionization chambers (GIC) is introduced. ...
First spatial separation of a heavy ion isomeric beam with a multiple-reflection time-of-flight mass spectrometer Dickel, T.; Plaß, W.R.; Andres, S. Ayet San; Ebert, J.; Geissel, H.; Haettner, E.; Hornung, C.; Miskun, I.; Pietri, S.; Purushothaman, S.; Reiter, M.P.; Rink, A.-K.; Scheidenberger, C.; Weick, H.; Dendooven, P.; Diwisch, M.; Greiner, F.; Heiße, F.; Knöbel, R.; Lippert, W.; Moore, Iain; Pohjalainen, Ilkka; Prochazka, A.; Ranjan, M.; Takechi, M.; Winfield, J.S.; Xu, X. (Elsevier BV * North-Holland, 2015)211Po ions in the ground and isomeric states were produced via 238U projectile fragmentation at 1000 MeV/u. The 211Po ions were spatially separated in flight from the primary beam and other reaction products by the ...