NDLI: Measurements on the energy loss of a relativistic electron beam in a plasma

Content Provider	IEEE Xplore Digital Library
Author	Jurgens, B. de Haan, P.H. Granneman, E.H.A. Hopman, H.J.
Copyright Year	1977
Description	Author affiliation: FOM-Inst. voor Atoom- en Molecuulfysica, Assoc. EURATOM - FOM, Amsterdam, Netherlands (Jurgens, B.; de Haan, P.H.; Granneman, E.H.A.; Hopman, H.J.)
Abstract	The energy transfer from a relativistic electron beam (550 keV, 500 A, 20 ns FWHM) to a plasma (Argon, $n_{e}$ = $10^{17}$ - $10^{18}$ $m^{-3})$ is investigated. The electron beam is injected into a precreated plasma column of 3 m length parallel to a magnetic field (0.16 T). Time resolved measurements of the return current in the system are used to determine phenomenologic collision frequencies. The collision frequencies found are of the order of $10^{8}$ $s^{-1},$ which is much larger than the classical collision frequencies. This points to high levels of turbulence. An important feature of the present experiment is the determination of the energy spectrum of the electron beam after its passage through the plasma. The time resolved energy spectrum of the beam shows rapid fluctuations on a time scale of 10 ns. Beam particles may loose up to 40% of their energy while also their scatter angle with respect to the magnetic field may increase from 30° to 60°. The broadening of the energy spectrum around the initial beam energy leads to the conclusion that electrostatic beam-plasma instabilities are present with a wave electric field E ≈ 1.8 × $10^{6}$ V/m.
Sponsorship	ERDA
Starting Page	369
Ending Page	380
File Size	859257
Page Count	12
File Format	PDF
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1977-10-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Physics
Subject Keyword	Particle beams Magnetic field measurement Particle beam measurements Heating Energy measurement Plasma measurements Plasmas
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
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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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