Spark repetition rate

It was found that an increase in voltage as well as in spark repetition rate leads to a considerable increase in the ablation rates. Indeed, in the case of aluminum... 

It was found that an increase in voltage as well as in spark repetition rate leads to a considerable increase in the ablation rates. Indeed, with aluminum samples it could be shown by trapping of the ablated material in concentrated HNO3 that in the case of a 25 Hz spark the ablation rates increased from 1 to 5 gg/min as the burning voltage was increased in the range 0.5-1.5 kV [247]. 

The pulse repetition rate is normally 100 pulses per sec. with pulse durations of either 10 or 32/u.s. After presparking, spark gap and ion illumination angle control is performed automatically (Conzemius and Svec, 1973b) and the analytical measurements are recorded by either electrical or photographic ion detection techniques. 

Warneck has carried out an extensive series of experiments in which he used a pulsed nitrogen-spark light source to determine drift velocities, diffusion coefficients, and kinetic temperatures as well as reaction rates of ions in gases. These have been the only photoionization experiments in which a pulse technique has been effectively used in the study of ion-molecule reactions. The reactant ions were formed by repetitive light pulses of about 0.5-//sec average duration, which (in all cases except hydrogen) was sufficiently short to justify the approximation of instanta-... 

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