Search found 1231 matches

by Starfire
Tue Dec 07, 2010 10:04 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: POPS
Replies: 30
Views: 12525

Re: POPS

<t>Nop - I suggested the sparkgap to keep the cost down and provide a good workable system that can be built on a small budget. It will not allow you much control of pulse width - more the other circuit components and layout. <br/> <br/> UHF or Microwave technics are required. Inductance will allow ...
by Starfire
Tue Dec 07, 2010 1:16 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: POPS
Replies: 30
Views: 12525

Re: POPS

Thinking about it - you would be best using a triggered spark-gap ( you can make yourself ) and a cap - it would give you a usefull HV pulse and not cost much - don't try to use a sine - not efficient for energy transfer.
by Starfire
Tue Dec 07, 2010 12:28 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: POPS
Replies: 30
Views: 12525

Re: POPS

<t>At high voltage a thyratron or a spark gap is the switch of choice - the problem with short pulses ( sub-nanosec pulse width ) is usual getting fast rise or fast fall time which can be difficult to get when using high energy. Keep the impedance as low as possible to achieve high energy fast trans...
by Starfire
Mon Dec 06, 2010 12:07 am
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: POPS
Replies: 30
Views: 12525

Re: POPS

<t>The great advantage of pulses is that you can use more power for a shorter time - beyond that which would distroy apparatus otherwise. <br/> <br/> Apparatus may withstand a short burst of power at a level which would distroy it, if continuously applied.<br/> <br/> Efficiency remains the same for ...
by Starfire
Sun Dec 05, 2010 11:32 pm
Forum: Vacuum Technology (& FAQs)
Topic: Can a house hold copper pipe hold a vacuum?
Replies: 8
Views: 4237

Re: Can a house hold copper pipe hold a vacuum?

The maximum pressure differiental from a vacuum is one atmosphere - very large dia pipes of very thin wall may be a problem but standard domestic pipe must meet standards which require withstanding several atmosphere test pressure.
by Starfire
Sat Nov 27, 2010 12:08 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: homemade neutron detector using ZnS(Ag) scintillator, is that possible ?
Replies: 5
Views: 4622

Re: homemade neutron detector using ZnS(Ag) scintillator, is that possible ?

<r>All this has been discussed before - read old posts ;-<br/> <br/> <URL url="http://www.fusor.net/board/viewtopic.php?f=13&t=5432#p36433"><LINK_TEXT text="viewtopic.php?f=13&t=5432#p36433">http://www.fusor.net/board/viewtopic.php?f=13&t=5432#p36433</LINK_TEXT></URL><br/> <br/> And if y...
by Starfire
Thu Nov 25, 2010 2:06 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Identify the isotopes
Replies: 23
Views: 7643

Re: Identify the isotopes

Richard the text books more or less explain the levels but not the reason an atom can remain stable for millions of years before decaying while its neighbour remains stable for another million and some decay in subnano sec
by Starfire
Wed Nov 24, 2010 1:09 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Identify the isotopes
Replies: 23
Views: 7643

Re: Identify the isotopes

Steven

Still does not explain why particular isotopes emit with characteristic energy - isotopes from the same element emit at different energy levels.
by Starfire
Tue Nov 23, 2010 9:37 pm
Forum: Books & References
Topic: Talk on Gamma Spec
Replies: 2
Views: 3172

Re: Talk on Gamma Spec

All is learning Jon - but I much prefer your method