Development and calibration of a Thomson parabola with microchannel plate for the detection of laser-accelerated MeV ions

Journal Article · Mon Sep 15 00:00:00 EDT 2008 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.2987687· OSTI ID:21266419

Harres, K; Schollmeier, M; Nuernberg, F; Roth, M ^[1]; Brambrink, E; Audebert, P ^[2]; Blazevic, A; Wahl, H ^[3]; Flippo, K; Gautier, D C; Hegelich, B M ^[4]; Geissel, M ^[5]; Schreiber, J ^[6]

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1. Institut fuer Kernphysik, Technische Universitaet Darmstadt, Schlossgartenstrasse 9, 64289 Darmstadt (Germany)
2. Ecole Polytechnique, CNRS, CEA, UPMC, Route de Saclay, 91128 Palaiseau (France)
3. Gesellschaft fuer Schwerionenforschung mbH, Planckstrasse 1, Plasmaphysik, 64291 Darmstadt (Germany)
4. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
5. Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)
6. Department fuer Physik, Ludwig-Maximilians-Universitaet, Am Coulombwall 1, 85748 Garching (Germany)

This article reports on the development and application of a Thomson parabola (TP) equipped with a (90x70) mm{sup 2} microchannel-plate (MCP) for the analysis of laser-accelerated ions, produced by a high-energy, high-intensity laser system. The MCP allows an online measurement of the produced ions in every single laser shot. An electromagnet instead of permanent magnets is used that allows the tuning of the magnetic field to adapt the field strength to the analyzed ion species and energy. We describe recent experiments at the 100 TW laser facility at the Laboratoire d'Utilization des Lasers Intenses (LULI) in Palaiseau, France, where we have observed multiple ion species and charge states with ions accelerated up to 5 MeV/u (O{sup +6}), emitted from the rear surface of a laser-irradiated 50 {mu}m Au foil. Within the experiment the TP was calibrated for protons and for the first time conversion efficiencies of MeV protons (2-13 MeV) to primary electrons (electrons immediately generated by an ion impact onto a surface) in the MCP are presented.

• OSTI ID: 21266419
• Journal Information: Review of Scientific Instruments, Vol. 79, Issue 9; Other Information: DOI: 10.1063/1.2987687; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CALIBRATION
CHARGE STATES
DETECTION
EFFICIENCY
ELECTROMAGNETS
ELECTRONS
IRRADIATION
LASERS
MAGNETIC FIELDS
MEV RANGE
MICROCHANNEL ELECTRON MULTIPLIERS
OXYGEN IONS
PARABOLAS
PERMANENT MAGNETS
PLASMA
PLASMA PRODUCTION
PROTONS
SURFACES