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Subject: Re: X-ray Generation & tube simulation

Date: 05/20/03 at 11:48 AM
Posted by: Mike Gray
E-mail: mike@amerytel.net
Message Posted:

In Reply to: X-ray Generation & tube simulation posted by Mark Siccio on 05/20/03 at 11:21 AM:

Hi Mark,
Variations of the C.W. Multiplier are commonly used in modern Dental X-ray tubeheads. The operating frequency ranges from 20KHz to about 100KHz, depending on make/model, etc. I believe you can simulate an X-ray tube with a h.v. resistor string. At 100KV, you will most likely have to immerse the whole thing in clean, degassed transformer oil. Simple Ohm's law can give you the total resistance value needed, based on the current and voltage that you designed the system for. Resistors can not simulate X-ray tubes exactly, because their E/I curve is linear, where X-ray tube E/I curves are not linear. But if you just need a simple load for testing the C.W. circuit, a hv resistor string should do just fine. Also make certain that it can handle the power over time (the oil bath will help cool the resistors). I do not know the equations for C.W. multipliers, but I'm sure a Google search on the Web will get you what you are looking for!

Regards,
Mike Gray, Amery X-ray, Inc.


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