induction discharge
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2019 ◽  
pp. 133-136 ◽  
Author(s):  
Pavel V. Starshinov ◽  
Oleg A. Popov ◽  
Igor V. Irkhin ◽  
Vladimir A. Levchenko ◽  
Victoriya N. Vasina

Experimental study of characteristics of a nonferrite electrode-less UV lamp with a length of 500 mm and width of 130 mm in the form of a closed quartz discharge tube with an inner diameter of 25 mm was conducted. The induction discharge was excited at a frequency of 1.7 MHz within the discharge lamp power Ppl ranging between 52 and 112 W in a mixture of mercury (~10-2 mm Hg) and argon (1.0 mm Hg) vapours by means of a 3-coil inductance located along the inner perimeter of the closed tube. With Ppl increasing: a) loss power in the inductance wire first decreased from 37 down to 22 W (Ppl = 84 W) and then increased up to 44 W; 2) the UV radiant flux of the lamp in a mercury light-band of 54 nm increased from 28 to 72 W; 3) radiant efficiency of the lamp at the light-band of 254 nm first increased from 31 to 48.5 % (Ppl = 84 W) and then slightly decreased down to 46 %; 4) radiant efficiency of the discharge plasma at the wavelength of 254 nm increased from 53 % to 65 %.


2019 ◽  
Vol 1328 ◽  
pp. 012069
Author(s):  
E A Skidchenko ◽  
E F Voznesensky ◽  
V A Sysoev ◽  
G G Lutfullina ◽  
A E Karnouhov ◽  
...  

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