Chronology Current Month Current Thread Current Date
[Year List] [Month List (current year)] [Date Index] [Thread Index] [Thread Prev] [Thread Next] [Date Prev] [Date Next]

Re: [Phys-l] [tap-l] X-Rays Detected From Scotch Tape



As to the hardness of vacuum needed for the production of x-rays from an
electron discharge, perhaps one could look over Roentgen's notes?

Brian W


At 07:08 PM 10/23/2008, Bernard Cleyet wrote:
On about < the mean free path of the electrons in the residual gas.
Given in the article 0.002" (~ 51 E-6 m), so go figger.

Not the best for calculation:


http://mysite.du.edu/~jcalvert/phys/scat.htm

bc skimmed


On 2008, Oct 23, , at 14:18, Marc "Zeke" Kossover wrote:

> I wonder how hard the vacuum needs to be? 10^-5? 10^-8?
>
> Zeke
>
> ----- Original Message ----
> From: Tom Kramer <tmkramer@alum.mit.edu>
> To: tap-l@lists.ncsu.edu
> Sent: Thursday, October 23, 2008 1:59:19 PM
> Subject: [tap-l] X-Rays Detected From Scotch Tape
>
> My wife saw this on aol:
>
> <http://news.aol.com/article/x-rays-detected-from-scotch-tape/221637>
>
>


Brian Whatcott Altus OK Eureka!