I worked on a 1 MW, 160 GHz Gyrotron in 1982 that used a diamond waveguide window. Yes diamond is the up-and-coming power electronics material with 50X the thermal conductivity of copper. It is also starting to be used as a protective thinfilm material.
Dave Cuthbert From: Fred Townsend [mailto:f...@poasana.com] Sent: Friday, January 31, 2003 3:03 PM To: John Woodgate Cc: emc-p...@majordomo.ieee.org Subject: Re: BeCu problem John, tubes are like vacuum deposition chambers. I have difficulty believing that a fancy form of carbon would be of any use in molded structures, HV, or HVAC. These conditions are all found in radar tubes. Also, thanks to Greggs comment about fancy screw drivers, I remembered that BeCu screw drivers, wrenches, etc. are used by the military in explosive environments because of their no sparking characteristics. Fred Townsend John Woodgate wrote: > I read in !emc-pstc that Fred Townsend <f...@poasana.com> wrote (in > <3e3a35fb.6ecc...@poasana.com>) about 'BeCu problem' on Fri, 31 Jan > 2003: > >BeO has seven times better thermal conductivity than AlO (alumina). There is > >no real substitute for BeO at high power levels. It is still used by the > >Military in high power radar applications such as tubes. > > Vapour Phase Deposition of diamond may replace BeO, with improved > thermal properties, AIUI, and no toxicity problem. > -- > Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk > Interested in professional sound reinforcement and distribution? Then go to > http://www.isce.org.uk > PLEASE do NOT copy news posts to me by E-MAIL! > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: emc-p...@hypercom.com > Dave Heald: davehe...@attbi.com > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org > Jim Bacher: j.bac...@ieee.org > > Archive is being moved, we will announce when it is back on-line. > All emc-pstc postings are archived and searchable on the web at: > http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
