Vacuum Tube with 3.5 TeV - UK Vintage Radio Repair and Restoration Discussion Forum

oldticktock · 19th Mar 2010, 3:17 pm

Well not quite radio related but pretty historic all the same.

http://news.bbc.co.uk/1/hi/sci/tech/8576545.stm

How big is and electron volt?
http://www-bd.fnal.gov/public/electronvolt.html

G8HQP Dave · 19th Mar 2010, 4:14 pm

Fortunately it doesn't need a 3.5TV EHT supply, but gives the beam a kick on each revolution. The real technical problem seems to be not the acceleration voltages, but the beam steering magnet currents. There is a heck of a lot of energy stored in the magnetic fields, and all this has to go somewhere when a quench occurs. That is why they had thick busbars melting last year. I think they are planning to put in even thicker ones.

Incidentally, the acceleration uses many MW of RF which has to be carefully synchronised around the ring - transmitter engineering with knobs on!

19th Mar 2010, 3:17 pm	#1
oldticktock Retired Dormant Member Join Date: Nov 2009 Location: Weardale, UK. Posts: 1,981	Vacuum Tube with 3.5 TeV Well not quite radio related but pretty historic all the same. http://news.bbc.co.uk/1/hi/sci/tech/8576545.stm How big is and electron volt? http://www-bd.fnal.gov/public/electronvolt.html

19th Mar 2010, 4:14 pm	#2
G8HQP Dave Rest in Peace Join Date: Sep 2008 Location: Solihull, West Midlands, UK. Posts: 4,872	Re: Vacuum Tube with 3.5 TeV Fortunately it doesn't need a 3.5TV EHT supply, but gives the beam a kick on each revolution. The real technical problem seems to be not the acceleration voltages, but the beam steering magnet currents. There is a heck of a lot of energy stored in the magnetic fields, and all this has to go somewhere when a quench occurs. That is why they had thick busbars melting last year. I think they are planning to put in even thicker ones. Incidentally, the acceleration uses many MW of RF which has to be carefully synchronised around the ring - transmitter engineering with knobs on!