Search found 131 matches

by steve_rb
Fri Jun 25, 2010 5:56 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Quartz torch firing, first RF experience
Replies: 8
Views: 4702

Re: Quartz torch firing, first RF experience

<t>morgothian<br/> <br/> One thing I realised I have about 2000 V peak to peak which with about 2KV RF power I used shows current is about 1 Amps. This creates a very weak magnetic filed. I don't know why despited zero reflection I have still very low current in the coil. I was expecting 10 Amps wit...
by steve_rb
Wed Jun 23, 2010 11:30 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Quartz torch firing, first RF experience
Replies: 8
Views: 4702

Re: Quartz torch firing, first RF experience

<t>I looked at RF 7 site and realised they have a few 13.56 MHZ refurbished RF units and they also take order for matchings too. If it is possible please send me his email address. I would like to talk to him and see if I can purchase a RF from them.<br/> <br/> Also I need to know how to prevent coo...
by steve_rb
Mon Jun 21, 2010 10:23 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Quartz torch firing, first RF experience
Replies: 8
Views: 4702

Re: Quartz torch firing, first RF experience

<t>Giving some though I guss cooling gas should be off at first when RF is turned on. After plasma ignition start cooling gas should be turned on gradually before quartz gets hot.<br/> <br/> Also seems spark igniter should have a short arc and should be right in the midle for the midle gas to be ion...
by steve_rb
Sun Jun 20, 2010 8:11 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Quartz torch firing, first RF experience
Replies: 8
Views: 4702

Quartz torch firing, first RF experience

<t>As my first experience after a few times burning my finer finally I could turn a quartz torch on using about 1.5 Kw 13.56 Rf. Attached is a photo of the fired torch . But flame didn't came out as it should be. Instead of a nice heart shape flame I see a cylindrical shape flame with turning lines....
by steve_rb
Fri Jun 04, 2010 12:17 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: ICP ion source with quartz tube inside
Replies: 4
Views: 2256

Re: ICP ion source with quartz tube inside

<t>Yes I have seen that patent. Process is too complicated. For now I am focusing on using Ti without any clad which means I will have poblem isolating it from steel chamber and for this I am searching for a type of hollow shaft high vacuum ceramic feedthrough. Ceramic for isolation and hollow for f...
by steve_rb
Fri Jun 04, 2010 4:59 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: ICP ion source with quartz tube inside
Replies: 4
Views: 2256

Re: ICP ion source with quartz tube inside

<t>I gave this some thought myself. I found this is not a good idea since inside quartz tube is filled with air and that will impose a high load to RF. One way of overcoming this is probably inserting a ferit core inside the coil or filling inside the quartz tube with ferit particles and doing this ...
by steve_rb
Thu Jun 03, 2010 10:53 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: ICP ion source with quartz tube inside
Replies: 4
Views: 2256

ICP ion source with quartz tube inside

<t>Most ICP ion sources have RF coil outside the ion source but I have to have rf coil inside since ion source chamber wall have to be made from steel. I have made RF copper coil with pyrex clad but pyrex is not suitable for inside ICP as tempreature is too high. I tried to build a quartz clad Ti RF...
by steve_rb
Wed May 12, 2010 5:14 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Proper regulator and valve?
Replies: 12
Views: 3316

Re: Proper regulator and valve?

<t>Doug Coulter wrote:<br/> > We are really not here to do all the science and engineering homework for others -- this is supposed to be *collaboration*, not a one way street of information -- *everyone* is supposed to contribute, not just ask for others to. <br/> <br/> Yes you are absolutly right. ...
by steve_rb
Tue May 11, 2010 10:34 am
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: ICP input gas flow calculation
Replies: 9
Views: 3925

Re: ICP input gas flow calculation

using Daniel orifice flow calculator software I have got about 500 ccm which seems too high. I don't know what mistake I have done.
by steve_rb
Tue May 11, 2010 7:10 am
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: ICP input gas flow calculation
Replies: 9
Views: 3925

Re: ICP input gas flow calculation

<r>Not that easy mate. I looked at a few of these links but still too complicated for me.<br/> <br/> <URL url="http://www.therebreathersite.nl/01_Informative/gas_flow_through_an_orifice.htm"><LINK_TEXT text="http://www.therebreathersite.nl/01_Info ... rifice.htm">http://www.therebreathersite.nl/01_I...