P.134. S.Mordyk, V.Miroshnichenko, D.Nahornyy, D.Shulha, V.Storizhko, and V.Voznyy (Insti-
tute of Applied Physics Nat. Acad. Sci., Ukraine)
DEVELOPMENT OF THE RF ION SOURCE ACCELERATOR-BASED APPLICATIONS
FOR USE IN
A helicon and a multicusp version of a radio-frequency ion sources with compact perma- nent magnet systems have developed and tested to show the following performance data: plasma density of 1011 - 9*1012 cm-3, pressure of 2-10 mTorr, beam current densities of 10 - 130 mA/cm2 , brightness ~100 A/(m2rad2eV), energy spread 8-30 eV, and an rf power input into the plasma of 40 - 300 W. Possibilities for a further increase in the brightness of the rf ion sources are discussed.
Dr. Serhiy Mikolaevich Mordyk: email@example.com
P.135. M.I.Ayzatskiy, A.N.Dovbnya, I.V.Khodak, V.A.Kushnir, V.V.Mytrochenko (The National Science Center "Kharkov Institute of Physic and Technology" (KIPT), Kharkov, Ukraine)
RF ELECTRON GUNS WITH PLASMA-ASSISTED EMISSION CATHODES
Electron beams with charge up to 100 nC in a nanosecond current pulse can be generated by photoemission RF guns. Thermal heating of a cathode caused by high power flow den- sity of laser pulse limits the increasing of the pulse charge. The alternative way the high charge can be achieved in RF guns is the application of cathodes with plasma-assisted electron emission. The feature of the cathodes is high emission current density (>10 2
/cm2). It was proposed earlier to apply in RF guns plasma cathodes based on ferroelec- trics*. Results of beam dynamics simulation and results of the experimental research of one-cell S-band RF gun operation with driven plasma cathode are considered in the paper. Results of operation of experimental samples of the cathode are provided and analysed.
I.V. Khodak, V.A. Kushnir. Performances of the beam generated by metal-dielectric
cathodes in RF electron guns. Proc. EPAC04, Lucerne, Switzerland, p.767-768.
Prof. Volodymyr Abramovich Kushnir: firstname.lastname@example.org