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RF versus DC for Generating Plasma

arainho_cl #3412 Hi All, Could some one eligthen me on the difference of using HV DC and RF for plasma generation. What are the pro and cons of each method. Thanks, Alfredo
Vladimir Chutko All Messages By This Member #3414 Hi Alfredo, In general, the both are just different methods to supply energy to ionize a gas and support the gas discharge - plasma. When you supply DC (it may be both high voltage and low voltage with external electrons emitter), electrons accelerate in electrical field to get energy which is necessary to ionize a gas molecule, when you supply RF, electrons are accelerated in RF (usually 13.56 MHz) field. There also may be MF (middle frequency, 40 - 100 kHz) plasma. The each method device design, pros and cons strongly depend on your application. Best regards, Vladimir Chutko, Ph.D. VECOR 101 Duranzo Aisle, Irvine, CA92606, USA Phone: +1-949-394-4466 Fax: +1-949-451-6813 info@... www.vecorus.com arainho_cl wrote: toggle quoted message Show quoted text Hi All, Could some one eligthen me on the difference of using HV DC and RF for plasma generation. What are the pro and cons of each method. Thanks, Alfredo ------------------------------------ Yahoo! Groups Links
Thomas Janstrom All Messages By This Member #3415 开云体育 That and costs, DC high voltage is usually cheaper to do than RF..... On 19/08/2010 1:01 PM, Vladimir Chutko wrote: toggle quoted message Show quoted text ? Hi Alfredo, In general, the both are just different methods to supply energy to ionize a gas and support the gas discharge - plasma. When you supply DC (it may be both high voltage and low voltage with external electrons emitter), electrons accelerate in electrical field to get energy which is necessary to ionize a gas molecule, when you supply RF, electrons are accelerated in RF (usually 13.56 MHz) field. There also may be MF (middle frequency, 40 - 100 kHz) plasma. The each method device design, pros and cons strongly depend on your application. Best regards, Vladimir Chutko, Ph.D. VECOR 101 Duranzo Aisle, Irvine, CA92606, USA Phone: +1-949-394-4466 Fax: +1-949-451-6813 info@... arainho_cl wrote: > Hi All, > > > Could some one eligthen me on the difference of using HV DC and RF for plasma generation. What are the pro and cons of each method. > > Thanks, > > Alfredo > > > > ------------------------------------ > > Yahoo! Groups Links > > > > >
Aurigema, Andrew N. (KSC-ASRC-474)[ASRC AEROSPACE] #3418 开云体育 15 kv AC is a lot easier and cheaper to make.? There are endless 15kv “beer sign” transformers out on Ebay for sale.? 15kv DC is just rectified AC so you get about the same thing only with the rectifier losses.? ? From: VacuumX@... [mailto:VacuumX@...] On Behalf Of arainho_cl Sent: Wednesday, August 18, 2010 10:11 PM To: VacuumX@... Subject: [VacuumX] RF versus DC for Generating Plasma ? ? Hi All, Could some one eligthen me on the difference of using HV DC and RF for plasma generation. What are the pro and cons of each method. Thanks, Alfredo
Gomez Addams #3424 ________________________________________ The most fundamental human right is ownership of your own body. If you may not do with it however you please, you are not yet free. On Thu Aug 19 6:02 , 'Aurigema, Andrew N. (KSC-ASRC-474)[ASRC AEROSPACE]' <andrew.n.aurigema@...> sent: 15 kv AC is a lot easier and cheaper to make.? There are endless 15kv “beer sign” transformers out on Ebay for sale.? 15kv DC is just rectified AC so you get about the same thing only with the rectifier losses.? Er, something like that. Full-wave rectified DC will be 1.414 X the RMS AV volts, so actually, 15kVDC = 21.2 kV before rectifier losses -- which with modern rectifiers, may be much lower than you might expect. I've noticed that Vf is much lower now than it was in the HV rectifiers of ten or twenty years ago. From: VacuumX@... [mailto:VacuumX@...] On Behalf Of arainho_cl Sent: Wednesday, August 18, 2010 10:11 PM To: VacuumX@... Subject: [VacuumX] RF versus DC for Generating Plasma Hi All, Could some one eligthen me on the difference of using HV DC and RF for plasma generation. What are the pro and cons of each method.

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