Perspectives for Highly Polarized Io Sources Development高极化离子源的发展前景.pptVIP

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Perspectives for Highly Polarized Io Sources Development高极化离子源的发展前景.ppt

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Perspectives for Highly Polarized Io Sources Development高极化离子源的发展前景

* * * * * * * * * * * * * Components of IUCF ABPIS (sextupole, ionization solenoid, RF dissociator, bending magnet, Arc discharge plasma source, Schematic of JINR ABPIS (SPI) with resonant charge exchange ionization (polarized H+,D+) General view of JINR ABPIS (SPI) with resonant charge exchange ionization (polarized H+,D+) Arc discharge ion source with expansion of plasma jet (Dimov BINP 1962) Plasma density up to 10 **15 cm-3; Ionization 99.9 %, dissociation 99%, transverse ion temperature 0.005 eV; multi slit extraction (H+, He+ ~2A); H-~16 mA (H2); D-~100 mA (Na); He-~10 mA (Na). 1-gas valve; 2-triggering; 3 cathode; 4-barier washe; 5-woshed channel; 6-anode; 7-extracrion holder; 9, 10 –extraction grids. Long pulse arc-discharge plasma generator with LaB6 cathode (heating prevents polarized particles adsorption and desorption as negative ions) Version with one LaB6 disc Version with several LaB6 discs Metal-ceramic discharge channel is developed Can be lower gas density, Higher He++ beam current Fast, compact gas valve, 0.1ms, 0.8 kHz 1 -current feedthrough; 2- housing; 3-clamping screw; 4-coil; 5- magnet core; 6-shield; 7-screw; 8-copper insert; 9-yoke; 10-rubber washer- returning springs; 11-ferromagnetic plate- armature; 12-viton stop; 13-viton seal; 14-sealing ring; 15-aperture; 16-base; 17-nut. Fast, compact Cesium Supplies *Cesium oven with cesium chromate pellets (Cs2CrO4+Ti) and press-form for pellets preparation. Cesium oven with BiCs2 alloy *Cesium oven with Cs getters (Cs2ChO4 +Zr+Al+…) Highly transparent fine precise extraction system A four-electrode multislit extraction consists of three multi-wire grids and a fourth cylindrical grounded electrode. The grids are made of 0.2 mm molybdenum wire. The spacing between wires is 1.0 mm. The wires are positioned on the mounting electrodes by precisely cut grooves and fastened by point welding. The mutual grid alignment accuracy is better than 0.02 mm. The gap between the first and secon