Category:x-rays

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This category covers my notes on x-ray experiments.

TRX 708 power supply schematic

diode
16 total, with pairs wired in series to double breakdown voltage. Diotec Semiconductor AG: DD1600 - 16 kV 20 mA diode, DD1800 - 18 kV 20 mA diode
capacitor
16 total, with pairs wired in series to double breakdown voltage. 1 nF = 1000 pF 15 kV (2 in series for 30 kV), Murata model DHR4E4C102K2FB (10%) or DHRB34C102M2FB (20%) -- these sell for about $1.60/each... For extreme performance look at Murata model DHS4E4G202KT2B (2000 pF, 40 kV 10%) or DHS4E4G202MTXB (2000 pF, 40 kV 20%) -- these sell for about $75/each
transformer
9 turns:500 turns (1:55.55). If the primary is driven by 120 VAC line voltage then then the output would be 6666 VAC, but other manuals state that the machine uses high-frequency 300 kHz power, but the voltage into the primary is not specified... If we assume the voltage output from the 8X Cockroft-Walton voltage multiplier must be no more than 70 kVp then the voltage from the transformer secondary must be 8750 Volts AC (70 kVp / 8) , so the primary should be near 157.5 Volts 300 kHz AC. I'm not figuring any losses. This is just a rough guess.

driver. The voltage level of this 300 kHz power into the primary is unknown. Dental x-ray units operate at ranges of about 65 to 90 kVp, 70 kVp and 10 mA is common. Power supplies are almost always pulsed DC, so assuming RMS voltage that gives about 500 Watts of power.

Samuel M. Goldwasser's X-Ray System Technology FAQ

Pages in category "x-rays"

The following 5 pages are in this category, out of 5 total.