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SUMMARY:Universal Main Magnetic Focus Ion Source: A New Tool for Laborator
 y Research of Astrophysics and Tokamak Microplasma
DTSTART;VALUE=DATE-TIME:20161013T104500Z
DTEND;VALUE=DATE-TIME:20161013T110000Z
DTSTAMP;VALUE=DATE-TIME:20260713T093824Z
UID:indico-contribution-480@cern.ch
DESCRIPTION:Speakers: VLADIMIR OVSYANNIKOV (Dresden MaMFIS Group)\nA novel
  room-temperature ion source for the production of  ions with charges from
  $2^{+}$ up to $80^+$ in electron beam within wide ranges of electron ener
 gy $E_e$ (500 eV $\\leq E_e \\leq 60$ keV) and current density $j_e$ ($10$
  A/cm$^2 \\leq j_e \\leq 20$ kA/cm$^2$) is developed. Due to combination o
 f two methods of sequential ionization of atoms\, the device can operate b
 oth as conventional Electron Beam Ion Source/Trap (EBIS/T) and novel Main 
 Magnetic Focus Ion Source (MaMFIS). In EBIS/T\, ions confined in the poten
 tial well are stored in the smooth electron beam going through a few drift
  tubes with positive potentials applied at the edge sections. In MaMFIS\, 
 the local ion traps with extremely high electron current density are forme
 d in crossovers of the rippled electron beam in a thick magnetic lens [1\,
 2].  The device is suitable for generation of both the low- and high-densi
 ty microplasma in steady state\, which can be employed for investigation o
 f a wide range of physical problems in an ordinary university laboratory\,
  in particular\, for astrophysics and Tokamak microplasma simulation. For 
 the electron beam characterized by the incident energy $E_e = 10$ keV\, th
 e current density $j_e \\sim 20$ kA/cm$^2$ and the number density $n_e \\s
 im 2 \\cdot 10^{13}$ cm$^{-3}$ were achieved experimentally [1-3]. For $E_
 e \\sim 60$ keV\, the value of electron number density $n_e \\sim 10^{14}$
  cm$^{-3}$ is feasible. The efficiency of MaMFIS for laboratory astrophysi
 cs significantly exceeds that of the existing warm EBIT at the National As
 tronomical Observatory of China and superconducting EBITs at the Lawrence 
 Livermore National Laboratory and the Harvard-Smithsonian Center for Astro
 physics.\n\n\nReferences\n\n[1] V. P. Ovsyannikov and A. V. Nefiodov\, Nuc
 l. Inst. Meth. B **367**\, 1 (2016). \n\n[2] V. P. Ovsyannikov and A. V. N
 efiodov\, Nucl. Inst. Meth. B **370**\, 32 (2016).\n\n[3]  A. Borovik\, Jr
 \, J. Dreiling\, R. Silwal\, E. Takács\, J. Gillaspy\, R. Lomsadze\, \nV.
  Ovsyannikov\, K. Huber\, S. Schippers\, A.  Müller\, and Yu. Ralchenko\,
  \n18th Int. Conf. on the Physics of Highly Charged Ions\, 2016\, Kielce\,
  Poland\, \nBook of Abstracts\, p. 44.\n\nhttps://indico.particle.mephi.ru
 /event/4/contributions/480/
LOCATION:Milan Hotel Rossini
URL:https://indico.particle.mephi.ru/event/4/contributions/480/
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