EBIS and EBIT - Spallation Neutron Source

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Radiative Recombination RR is time-reversed photo-ionisation: σ RR nl ( k ) hν k 2 2 1 2m Therefore RR cross sections may be calculated from cross sections for photo ionisation, which is a well established procedure (T. Stöhlker, Kim <strong>and</strong> Pratt) : e c 2 σ ph nl ( k 2 2 ph 0 2 2 nl k ( 1 n κ ) g(n,l;κ, l 2 3 Z ll12l 1 4πa n l )
Electron energy (eV) 10 5 10 4 10 3 10 2 10 1 RR versus Ionisation “Balance energy” at which the gain by ionization equals loss by radiative recombination for lead ions 0 20 40 60 80 P b Charge states Slow electrons are the worst enemies of highly charged ions!
Page 1 and 2: EBIS and EBIT Reinard Becker, Goeth
Page 3 and 4: electron gun U(Z) Principles of EBI
Page 5 and 6: Cross sections (cm 2 ) 10 -15 10 -1
Page 7 and 8: Ionisation energies by C. Moore
Page 9: 10 -3 Pressure (mbar) 10 -6 10 -9 1
Page 13 and 14: In EBIT injected ions could be trap
Page 15 and 16: Results of charge breeding simulati
Page 17 and 18: 40 years of EBIS history Device yea
Page 19 and 20: BNL-EBIS results and projections 4
Page 21 and 22: Device year place name w/c/r Bmax l
Page 23 and 24: future applications for EBITSs
Page 25 and 26: Super-compression in CRYEBIS-I (197
Page 27 and 28: 0.6 Relative abundance 0.4 0.2 aver
Page 29: Conclusions EBISes and EBITs are al

EBIS and EBIT - Spallation Neutron Source

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