Misjudging negative ions for electrons in intense laser plasma diagnostics
| Autor: | Debobrata Rajak, Aditya K. Dharmadhikari, Ram Gopal, Sheroy Tata, M. Anand, S. V. Rahul, M. Krishnamurthy, J. Jha, Angana Mondal, A. K. Gupta |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Physics Scintillation General Physics and Astronomy 02 engineering and technology Electron Plasma 021001 nanoscience & nanotechnology Laser 01 natural sciences Charged particle lcsh:QC1-999 Ion law.invention Magnetic field law 0103 physical sciences Plasma diagnostics Atomic physics 0210 nano-technology lcsh:Physics |
| Zdroj: | AIP Advances, Vol 9, Iss 2, Pp 025115-025115-7 (2019) |
| ISSN: | 2158-3226 |
| Popis: | Intense laser produced plasmas are known to be novel compact sources of high energy electrons. Electrons deflected by magnetic fields and imaged on phosphorescent plates is a well used diagnostic for electron spectrum measurements. As only negatively charged particles are filtered by the magnetic field, it is a common practise to interpret the measured scintillation entirely as a signal due to the electrons. We show here that such an interpretation can be erroneous. Low energy H− ions arrive concurrently at the same position as high energy electrons and can lead to a wrong assessment of the maximum electron energy measured, which is often used in understanding the underlying physics. Conventional accelerator based experiments prove that the H− ions are indeed detected even when the image plate is covered with a metal foil. |
| Databáze: | OpenAIRE |
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