So here's a simple 'poser' I submit to various electronics fora upon which I participate -- that said I don't think it's particularly 'Googleable'...

Q) What is the purpose and nature of a high vacuum, hot-cathode, diode which draws a mere 100mA (Max) @ 100kV

Hints
Application, obviously, is NOT rectification.
Device is in very wide (one might even say ubiquitous) use to this day.

Best regards
HP

PS as I understand posting policy, a post of this nature is acceptable here, if not, please educate me as to the error of my ways (i.e. direct me to the appropriate forum)

 

Hello,

A rontgen tube will be the purpose for the 100 mA @ 100 kV.

Bertus

 

Hmm, imagine those 10kW running continuously

 

So here's a simple 'poser' I submit to various electronics fora upon which I participate -- that said I don't think it's particularly 'Googleable'...

Q) What is the purpose and nature of a high vacuum, hot-cathode, diode which draws a mere 100mA (Max) @ 100kV

Hints
Application, obviously, is NOT rectification.
Device is in very wide (one might even say ubiquitous) use to this day.

Best regards
HP

PS as I understand posting policy, a post of this nature is acceptable here, if not, please educate me as to the error of my ways (i.e. direct me to the appropriate forum)

100keV is at the upper end of the X-ray region, so I'm going to guess you are talking about some kind of X-ray tube.

As for being a "mere" 100mA, given that 100mA at 100kV is 10kW, I don't know that I would classify that as a "mere" level of current.

 

Hello,

A rontgen tube will be the purpose for the 100 mA @ 100 kV.

Bertus

Well, actually, a Coolidge (hot cathode) tube -- Still you got it in one! Golly! golly! Usually this quiz creates a mile-long thread -- Good call!!!

Hmm, imagine those 10kW running continuously

That'd be fluorosocopy at full current -- Now you've got me smelling burning dielectric oil

Best regards
HP

 

Hello,

I know because I have worked quite some years with the X-ray equipment, quite some years ago.
I have worked with rontgen fluorescent and rontgen diffraction equipment.

Here is a nice page with info on the X-ray generation:
http://en.wikibooks.org/wiki/Basic_Physics_of_Digital_Radiography/The_Source

Bertus

 

100keV is at the upper end of the X-ray region, so I'm going to guess you are talking about some kind of X-ray tube.

As for being a "mere" 100mA, given that 100mA at 100kV is 10kW, I don't know that I would classify that as a "mere" level of current.

Indeed! Though you must admit that it is shockingly (NPI) paltry for a thermionic device operating at that anode potential (and a white-hot filament)

Best regards
HP

 

I used to have a lot of 'fun' with this -- As a new member on certain fora I'd feign 'nubieism' for about a week then ask:

"I found this tube in a junk shop that looks like a bottle with a hockey-puck inside I don't think it's gassy because it doesn't glow when I hit it with my TC -- even with the filament bright it doesn't draw much current... [then I'd close the post with something like] gotta go I haven't been feeling well lately..." then watch the veritable flood of mingled advice, sympathy and outrage -- rarely did anyone spot the connection to my username to wit: "ARS"

Don't worry I'm 'all gwod up now' and will refrain from such antics here

 

Don't worry I'm 'all gwod up now' and will abstain from such antics here

I guess you are getting ready to celebrate on the 15th?
Max.

 

OK I give up --- What relation has the Ides to my post?

With quizzical regards
HP

 

A reference to your avatar!
Max.

 

Oh that... Actually my avatar is not a depiction of Cleopatra --- howbeit I think you get it...

Best regards
HP