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TECHNOLOGIES & APPLICATIONS

“TITAN”: AN ION SOURCE

Purpose

The Titan ion source depends for its operation on two forms of arc discharge with a common hollow anode initiated simultaneously or one after another.

A constricted discharge between cathode 1 and hollow anode 2 serves to generate gas ions and initiate a vacuum arc (with the discharge operating time being 20 ms). Metal ions are generated in the cathode spots of the vacuum arc initiated between electrode 2 and electrode 3. The ions are extracted from the plasma surface stabilized by fine-mesh metal grid 4. The ions are accelerated to a required energy by a dc accelerating voltage applied at the gap between hollow anode 2 and electrode 5. The latter consists of two grids made of metal wires and showing a high geometrical transparency. The accelerated ion beam is taken by a collector on which specimens or machine parts are placed. To cut off the secondary electrons knocked out from the collector by the ions, a negative potential of no less than 15 kV is applied to one of the grids of electrode 6. Insulator 7 is filled with transformer oil. The source is cooled with water circulating through a radiator.

Specifications
1.Accelerating voltage20-80 kV
2.- Vacuum arc current
- Constricted arc current

50-150 A
30-60 A
3.- Metal ion beam current
- Gas ion beam current

0.1-0.5 A
0.1-0.25 A
4.Operating pulse repetition rates12.5, 17, 25, 50 Hz
5.Current pulse duration400 ms
6.Delay of vacuum arc initiation from constricted arc initiation0-400 ms
7.Ion beam cross-sectional area250 cm2
8.Vacuum arc operation time with-out changing the cathode30 h
9.Constricted arc operation time without changing the cathodes100 h
10.Source power supply voltage3х380 V
11.Excess pressure of compressed gas in the source2-10 atm

The source is capable to produce ion beams of any gases (except oxygen) and metals.


For further information please contact:


Georgy Yu. Yushkov
Dr. Sci. (Engineering), Leading Researcher

Phone: (3822) 49-17-76
Fax: (3822) 49-24-10
E-mail: gyushkov@hcei.tsc.ru




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