If you need assistance, please send an email to forum at 4hv dot org. To ensure your email is not marked as spam, please include the phrase "4hv help" in the subject line. You can also find assistance via IRC, at irc.shadowworld.net, room #hvcomm.
Support 4hv.org!
Donate:
4hv.org is hosted on a dedicated server. Unfortunately, this server costs and we rely on the help of site members to keep 4hv.org running. Please consider donating. We will place your name on the thanks list and you'll be helping to keep 4hv.org alive and free for everyone. Members whose names appear in red bold have donated recently. Green bold denotes those who have recently donated to keep the server carbon neutral.
Special Thanks To:
Aaron Holmes
Aaron Wheeler
Adam Horden
Alan Scrimgeour
Andre
Andrew Haynes
Anonymous000
asabase
Austin Weil
barney
Barry
Bert Hickman
Bill Kukowski
Blitzorn
Brandon Paradelas
Bruce Bowling
BubeeMike
Byong Park
Cesiumsponge
Chris F.
Chris Hooper
Corey Worthington
Derek Woodroffe
Dalus
Dan Strother
Daniel Davis
Daniel Uhrenholt
datasheetarchive
Dave Billington
Dave Marshall
David F.
Dennis Rogers
drelectrix
Dr. John Gudenas
Dr. Spark
E.TexasTesla
eastvoltresearch
Eirik Taylor
Erik Dyakov
Erlend^SE
Finn Hammer
Firebug24k
GalliumMan
Gary Peterson
George Slade
GhostNull
Gordon Mcknight
Graham Armitage
Grant
GreySoul
Henry H
IamSmooth
In memory of Leo Powning
Jacob Cash
James Howells
James Pawson
Jeff Greenfield
Jeff Thomas
Jesse Frost
Jim Mitchell
jlr134
Joe Mastroianni
John Forcina
John Oberg
John Willcutt
Jon Newcomb
klugesmith
Leslie Wright
Lutz Hoffman
Mads Barnkob
Martin King
Mats Karlsson
Matt Gibson
Matthew Guidry
mbd
Michael D'Angelo
Mikkel
mileswaldron
mister_rf
Neil Foster
Nick de Smith
Nick Soroka
nicklenorp
Nik
Norman Stanley
Patrick Coleman
Paul Brodie
Paul Jordan
Paul Montgomery
Ped
Peter Krogen
Peter Terren
PhilGood
Richard Feldman
Robert Bush
Royce Bailey
Scott Fusare
Scott Newman
smiffy
Stella
Steven Busic
Steve Conner
Steve Jones
Steve Ward
Sulaiman
Thomas Coyle
Thomas A. Wallace
Thomas W
Timo
Torch
Ulf Jonsson
vasil
Vaxian
vladi mazzilli
wastehl
Weston
William Kim
William N.
William Stehl
Wesley Venis
The aforementioned have contributed financially to the continuing triumph of 4hv.org. They are deserving of my most heartfelt thanks.
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
radhoo wrote ...
Stella, this seems like very useful info, how where the graphs processed/drawn?
what was the mechanism in taking these values?
it the first line referring to air composition? N , O , Ar ? How was this data gathered?
Thanks!
I used the gas transmission calculator on the website of The Center for X-Ray Optics and Advanced Light Sources at Lawrence Berkeley National Laboratory. You'll find the gas transmission calculator in the X-Ray Interactions With Matter section of the X-Ray Database.
While you're there, you can get yourself a free pdf copy of their X-Ray Data Booklet from here:
Registered Member #1938
Joined: Sun Jan 25 2009, 12:44PM
Location: Romania
Posts: 699
Nice find, for a moment I had the impression that you did the measurements yourself (including the chemical composition of air), and I was like "Wow - how did she do this "? . Nevertheless a valuable piece of information you posted there.
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
radhoo wrote ...
Nice find, for a moment I had the impression that you did the measurements yourself (including the chemical composition of air), and I was like "Wow - how did she do this "? . Nevertheless a valuable piece of information you posted there.
Golly, Radu, you didn't think I'd want to spend all afternoon punching numbers into a keyboard, when I could be sitting out in the garden with a bottle of wine!
Registered Member #1938
Joined: Sun Jan 25 2009, 12:44PM
Location: Romania
Posts: 699
Proud Mary wrote ...
Golly, Radu, you didn't think I'd want to spend all afternoon punching numbers into a keyboard, when I could be sitting out in the garden with a bottle of wine!
Actually after all that exotic equipment I've seen you have and use, this would have been quite probable :) .
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
radhoo wrote ...
Proud Mary wrote ...
Golly, Radu, you didn't think I'd want to spend all afternoon punching numbers into a keyboard, when I could be sitting out in the garden with a bottle of wine!
Actually after all that exotic equipment I've seen you have and use, this would have been quite probable :) .
Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
radhoo wrote ...
Proud Mary wrote ...
Golly, Radu, you didn't think I'd want to spend all afternoon punching numbers into a keyboard, when I could be sitting out in the garden with a bottle of wine!
Actually after all that exotic equipment I've seen you have and use, this would have been quite probable :) .
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
2X2A Efficiency As An X-Ray Producer
Efficiency = KV x Z x 10E-6*
where KV is the voltage in kV, and Z is the Atomic Number of the anode material.
The 'target' of the inverted 2X2A is an iron alloy, but with no means at our disposal to determine the other constituent metals, we'll have to proceed as though it were 100% iron, and I don't think we shall be too far wrong.
Thus at 25kV, and an Fe target of Atomic Number 26, Efficiency = 25 x 26 x 10E-6 = 6.5E-3
This will be my final contribution to this thread, as I have other pressing concerns - especially the need to paint my nails, and get drunk in the garden.
Registered Member #1143
Joined: Sun Nov 25 2007, 04:55PM
Location: Vilnius, Lithuania
Posts: 721
I have one question I was playing with my brand new x ray generator (200V 0,3A for tube HV multiplier SMPS) , and started to get headache. Tube is constructed to create good quality beam, it was shooting all rays out of my house through window, and i was 6m away with at least 20cm of concrete. also i was diagonally across the concrete wall, so it could be easy as 1m of concrete, and Geiger does not show any sign of high radiation. also test was made near open window, so low O3 concentration... SO it's just coincidence or just placebo ?
This site is powered by e107, which is released under the GNU GPL License. All work on this site, except where otherwise noted, is licensed under a Creative Commons Attribution-ShareAlike 2.5 License. By submitting any information to this site, you agree that anything submitted will be so licensed. Please read our Disclaimer and Policies page for information on your rights and responsibilities regarding this site.
Vacuum Rectifiers X-rays report
