Search found 212 matches

by Chris Trent
Mon Feb 14, 2011 7:17 pm
Forum: Vacuum Technology (& FAQs)
Topic: Turbomolecular Pump Question
Replies: 4
Views: 1930

Re: Turbomolecular Pump Question

<t>It is a simple yet complex question,<br/> <br/> Simple in that the turbo pump goes between your backing pump and the chamber...<br/> Complex in that each Fusor is different, and we don't know what you have to work with or want to achieve.<br/> <br/> Fortunately this has been addressed thoroughly ...
by Chris Trent
Mon Feb 14, 2011 6:14 am
Forum: Vacuum Technology (& FAQs)
Topic: TPU 110
Replies: 2
Views: 1809

Re: TPU 110

I'd guess Pfeiffer Balzers.

If that's correct, here's a manual for the controller. It has lots of valuable information.

http://www.ptbsales.com/manuals/balzers/tcp121.pdf
by Chris Trent
Wed Feb 02, 2011 1:30 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Succesful sodering of stainless steel with standard electrical solder
Replies: 9
Views: 3620

Re: Succesful sodering of stainless steel with standard electrical solder

<r>Have you tried lead free solder yet?<br/> <br/> Also Check this thread:<br/> <br/> <URL url="http://www.fusor.net/board/viewtopic.php?f=6&t=2917&hilit=Lead+Solder#p12427"><LINK_TEXT text="viewtopic.php?f=6&t=2917&hilit=Lead+Solder#p12427">http://www.fusor.net/board/viewtopic.php?f...
by Chris Trent
Mon Jan 31, 2011 2:11 am
Forum: Other Forms of Fusion - Theory, Construction, Discussion, URLs
Topic: Hot fusion idea
Replies: 19
Views: 7170

Re: Hot fusion idea

<t>I've already done the research, and am aware of the work at General Fusion. They are using pistons to compress plasma. <br/> <br/> There are others using magnetic fields to do the same, as well as electrostatic fields, resonance, pinch effects, etc...<br/> <br/> All of the above use plasma as the...
by Chris Trent
Sat Jan 29, 2011 1:37 am
Forum: Other Forms of Fusion - Theory, Construction, Discussion, URLs
Topic: Hot fusion idea
Replies: 19
Views: 7170

Re: Hot fusion idea

<t>One simple problem.<br/> <br/> The ideal gas law, which describes the relationship between density, pressure, and temperature of a gas, and which is also serves as part of the basis of wave propagation calculations in gas, becomes less and less accurate at high pressure.<br/> <br/> Essentially: O...
by Chris Trent
Sat Jan 29, 2011 12:56 am
Forum: Vacuum Technology (& FAQs)
Topic: Simple turbo pump controller
Replies: 54
Views: 35476

Re: Simple turbo pump controller

<t>I've made a few other changes to the setup I'm using.<br/> <br/> First, you may recognize that I simplified the design a bit by using a Full H-Bridge L298 IC.<br/> The Full bridge lets me run single phase pumps that aren't center tapped, as well as get more torque out of those that are. Both circ...
by Chris Trent
Fri Jan 28, 2011 8:05 am
Forum: Other Forms of Fusion - Theory, Construction, Discussion, URLs
Topic: Fission/Fusion of water using HV DC
Replies: 7
Views: 3225

Re: Fission/Fusion of water using HV DC

<t>You'll find that HV arcs can vary remarkably based on quite a number of factors. Voltage, Current, Frequency, polarity, humidity, capacitance, conductivity and shape of nearby objects, to name just a few.<br/> <br/> I did not see anything there that indicated anything more than a simple arc. <br/...
by Chris Trent
Tue Jan 25, 2011 8:30 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Has anyone tried to monitor the 511 keV annihilation line from Sun Fusion?
Replies: 15
Views: 5244

Re: Has anyone tried to monitor the 511 keV annihilation line from Sun Fusion?

<t>You might have to call the big guns in on that.<br/> <br/> The Fermi Gamma-Ray space telescope should be able to make that observation easily.<br/> <br/> As I recall the specs, it can measure the energy and direction of gamma rays. I wonder who you would have to ask at NASA for some of the raw da...
by Chris Trent
Sun Jan 23, 2011 10:44 pm
Forum: Vacuum Technology (& FAQs)
Topic: Simple turbo pump controller
Replies: 54
Views: 35476

Re: Simple turbo pump controller

<t>I have modified this circuit with a L298 H-Bridge in place of the mosfets. In my case the purpose was to drive the a single phase Molecular Drag pump with no center tap, but the addition should work well for most of the rest of you.<br/> <br/> The local electronics surplus shop had a whole box of...
by Chris Trent
Wed Jan 19, 2011 10:25 am
Forum: Vacuum Technology (& FAQs)
Topic: MDP Controller?
Replies: 7
Views: 2453

Re: MDP Controller?

<t>Pinout for MDP 5010 is slightly different,<br/> <br/> Pins are nubmbered 1-7,<br/> 1 Motor Coil<br/> 2 Motor Coil<br/> 3 Unused<br/> 4 Hall Sensor output, (-4V relative to pin 7)<br/> 5 Unused<br/> 6 Hall Sensor negative<br/> 7 Hall Sensor positive<br/> <br/> It appears that a thermistor is wired...