What are the obstacles to building a pen-sized free-electron laser?

[STEVE ROBERTS]

My hunch is radixm, archimexes plutonium , News2x2x and a few others
are a ongoing research project by some psych professor and his grad
students to find out how much bullcrap usenet experts will take. Note
that I put in the x's to fool the search engines, cause gawd knows we
don't need a 2o2o around again, unless its a Spectra 2020 doing 3
tunable watts whitelight in FEL mode and its free. Problem is you
guys just told this nut about the sacred dogs!, whats next, are you
guys gonna tell him about Area 52?. Maybe if we're luckly the Air
Force would invite him out to Starfire and teach him a few things, does
the remaining grey matter adsorb at sodium guidestar wavelengths? Make
sure we tell him how tinfoil hats actually improve coupling at 2.5 Ghz!

lol,

Steve Roberts

 

[Phineas T Puddleduck]

Well, to begin with, the size of the accelerator required.

Is it possible to make vacuum pumps, high-voltage power supplies,
shielding and accelerators that are small enough to fit in a pen-sized
object?[/QUOTE]

Are you seriously asking this question?

--
Relf's Law? -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
"Bullshit repeated to the limit of infinity asymptotically approaches
the odour of roses."
Corollary -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
³It approaches the asymptote faster, the more Œpseduos¹ you throw in
your formulas.²
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
³Gravity is one of the four fundamental interactions. The classical
theory of gravity - Einstein's general relativity - is the subject
of this book.² : Hartle/ Gravity pg 1
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Jaffa cakes. Sweet delicious orange jaffa goodness, and an abject lesson
why parroting information from the web will not teach you cosmology.
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

 

[Radium]

Is it possible to make vacuum pumps, high-voltage power supplies,
shielding and accelerators that are small enough to fit in a pen-sized
object?

Are you seriously asking this question?
Yes.


--
Relf's Law? -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
"Bullshit repeated to the limit of infinity asymptotically approaches
the odour of roses."
Corollary -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
³It approaches the asymptote faster, the more Œpseduos¹ you throw in
your formulas.²
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
³Gravity is one of the four fundamental interactions. The classical
theory of gravity - Einstein's general relativity - is the subject
of this book.² : Hartle/ Gravity pg 1
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Jaffa cakes. Sweet delicious orange jaffa goodness, and an abject lesson
why parroting information from the web will not teach you cosmology.
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+[/QUOTE]

 

[Eeyore]

Yes.

You're even madder than some ppl may have thought in that case.

Do you enjoy ridiculing yourself on Usenet ?

Graham

 

[C what I mean]

Not to mention the various byelaws liniting the numbers of pens per dog.
Oh, did I mention them? I guess I did. >

LOL!! Couldn't have said it better myself!

 

[Greg Hansen]

Yes.

Vacuum tubes seem to work pretty well.

Seal it off with a getter to help maintain the vacuum. Electrons can be
accelerated electrostatically with a high voltage applied to electrodes
at each end. High voltages from batteries are no big trick, e.g. camera
flashes, although the current will be highly limited. Permanent magnets
along the tube can act as benders and wigglers.

Now, having laid out that basic plan, I have no idea if you'd actually
get a beam from it. Even big and fancy free electron lasers haven't
lived up to their promise, although efforts continue.

 

[Phat Bytestard]

[email protected] wrote:


Huh? I thought you physicists asked the purple unicorn for
gifts. I'll never keep this stuff straight.

First, the guy asks about "free electron" "powered" devices, then,
upon hearing that there is no POWER available in such realms, he now
wants HV supplies.

I made an HV supply at 15kV that would fit six units in a pack of
cigs.
Ran off 3 volts. Anyway, laser diodes don't need that much to feed
'em.

 

[[email protected]]

Yes.

You will cease getting silly answers if you ask where you
can find more information about your ideas. It is perfectly
reasonable to have one that won't work but you do need to
do your own research. Finding all this stuff out on your
own is fun. Most of the scientists here will be glad to
point you at reading and lab material.

/BAH

 

[Rich Grise]

Is it possible to make vacuum pumps, high-voltage power supplies,
shielding and accelerators that are small enough to fit in a pen-sized
object?

Sure, if you have small enough tools, and a supply of machineable
neutronium.

Good Luck!
Rich

 

[Rich Grise]

What was that one where they shrunk a craft and its crew and injected them into the
bloodstream ?

"Fantastic Voyage". Oddly enough, The Good Doctor Asimov had his hands in
that, like he wrote the original story.

I saw a different movie on the same theme, but with Dennis Quaid and
Martin Short, but I can't remember the name of it - the craft has only
Quaid in it, and it accidentally gets stuck into Short, and nobody knows
it's there - attempted hilarity ensues. ;-)

Cheers!
Rich

 

[Eeyore]

Sure, if you have small enough tools, and a supply of machineable
neutronium.

Surely you mean Absurdium ?

Graham

 

[Lostgallifreyan]

Surely you mean Absurdium ?

Graham

And my favourite of all, the unobtainium nullate to stabilise the plasma.
So long as remembers that at times he might have to reverse the polarity of
the neutron flow.

 

[Rich Grise]

Minor trivia bit: the Good Doctor actually did not write the ORIGINAL
story. "Fantastic Voyage," the novel by Isaac Asimov, was actually an
adaptation of the previously-written screenplay. In one of Asimov's
columns for Analog magazine, he once discussed the problems he had in
coming up with a plausible process for shrinking the submarine and crew,
given the way the original screenplay had been written. In his novel,
there's also a very slightly different ending - they had to make sure that
the white blood cell that had ingested the _Proteus_ ALSO made it out from
Benes' body, or else the expanding bits of wrecked submarine would've
killed him just as certainly as the injury they were trying to cure. That
little bit was completely ignored in the movie.


"InnerSpace," 1987.

Bob M.

Thanks for this! Plus, I remember that getting the Quaid vehicle out
without blowing up Short was quite instrumental to the plot, toward
the end, so to speak.

Thanks!
Rich

 

[Phat Bytestard]

Woah.. now that is too much info from you Pat! You have to get another
hobby, there are only so many dogs.. LOL!

W A R N I N G G R A P H I C S T O O P I D I T Y described below.

DO NOT read if you do not wish to be "grossed out".








That guy from the Ramones put a dog in his butt (a hot dog). Then he
pooped it... then he ate it...

 

[Phat Bytestard]

Yes, but they vary, do they not? What we need to establish is the ratio of
pen to dog, taking into account the internal anatomy of said dog (taken as
species entire), and then to calculate the minumum risk factor due to dog
reluctance and the maximum risk factor posed by the various laws dealing
with bestiality in the various nations in which dogs are found. No doubt
there might also be laws pertaining to the insertion of pens in an
inappropriate manner.

Fill one dog with a bunch of pens and make a piñata (peen yata) :-]

Or make one pen a really high powered laser, and every time you hit
the piñata, the laser cuts "a piece" off of someone in the room.

 

[Phat Bytestard]

Not to mention the various byelaws liniting the numbers of pens per dog.
Oh, did I mention them? I guess I did. >

"byelaws"

MMmmm MmmmOKAY... sure...

Do pen stuffed dogs do better in a dog fight?

Do they "check for pens" (ala horse race blood test) in the dog
after every match to ensure there was no cheating by the use of a
"hopped up" dog.

 

[Phat Bytestard]

Well, he's a kid, what does he know about purple unicorns.

Mati Meron | "When you argue with a fool,
[email protected] | chances are he is doing just the same"

And they're tasty too!

 

[Phat Bytestard]

Vacuum tubes seem to work pretty well.

Seal it off with a getter to help maintain the vacuum. Electrons can be
accelerated electrostatically with a high voltage applied to electrodes
at each end. High voltages from batteries are no big trick, e.g. camera
flashes, although the current will be highly limited. Permanent magnets
along the tube can act as benders and wigglers.

(Foghorn Leghorn inflection) Whatchubeensmokin', boy?

Heater enamel ceramics, I'd bet. ;-]

Now, having laid out that basic plan, I have no idea if you'd actually
get a beam from it.

Heater will open outside a vacuum. In an Oxygen environment, moth
and rust doth corrupt.

Even big and fancy free electron lasers haven't
lived up to their promise, although efforts continue.

Whatchubeensmokin', boy?

 

[[email protected]]

And they're tasty too!

Shhh, don't tell everybody, the supply is limited.

Mati Meron | "When you argue with a fool,
[email protected] | chances are he is doing just the same"