FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups 
 ProfileProfile   PreferencesPreferences   Log in to check your private messagesLog in to check your private messages   Log inLog in 
Forum index » Electronix » Basics
What are the obstacles to building a pen-sized free-electron laser?
Post new topic   Reply to topic Page 1 of 4 [48 Posts] View previous topic :: View next topic
Goto page:  1, 2, 3, 4 Next
Author Message
Eeyore
electronics forum Guru


Joined: 22 Jun 2006
Posts: 642

PostPosted: Tue Jul 18, 2006 3:35 am    Post subject: Re: What are the obstacles to building a pen-sized free-electron laser? Reply with quote

Radium wrote:

Quote:
Hi:

All laser pointers in the market use diode-lasers. What makes it so
difficult to make a pointer-sized free-electron laser?

Because electrons aren't really free. They cost lots of money.

Graham
Back to top
Norm Grimpo
electronics forum beginner


Joined: 10 Jul 2006
Posts: 2

PostPosted: Tue Jul 18, 2006 3:37 am    Post subject: Re: What are the obstacles to building a pen-sized free-electron laser? Reply with quote

"Radium" <glucegen1@excite.com> wrote in message
news:1153192138.781448.283830@p79g2000cwp.googlegroups.com...
Quote:
Hi:

All laser pointers in the market use diode-lasers. What makes it so
difficult to make a pointer-sized free-electron laser?


how much power ?
Back to top
Radium
electronics forum addict


Joined: 11 May 2006
Posts: 95

PostPosted: Tue Jul 18, 2006 3:39 am    Post subject: Re: What are the obstacles to building a pen-sized free-electron laser? Reply with quote

Chuck Grempu wrote:
Quote:
"Radium" <glucegen1@excite.com> wrote in message
news:1153192138.781448.283830@p79g2000cwp.googlegroups.com...
Hi:

All laser pointers in the market use diode-lasers. What makes it so
difficult to make a pointer-sized free-electron laser?


how much power ?

The same amount of power used by a conventionaly laser-pointer
Back to top
jimp@specsol.spam.sux.com
electronics forum beginner


Joined: 17 Jan 2006
Posts: 36

PostPosted: Tue Jul 18, 2006 3:45 am    Post subject: Re: What are the obstacles to building a pen-sized free-electron laser? Reply with quote

In sci.physics Radium <glucegen1@excite.com> wrote:
Quote:
Hi:

All laser pointers in the market use diode-lasers. What makes it so
difficult to make a pointer-sized free-electron laser?


Quote:
Thanks,

Radium

You mean other than the size of stuff like vacuum pumps, high voltage
power supplies, and shielding required to generate a relativistic
electron beam?

--
Jim Pennino

Remove .spam.sux to reply.
Back to top
mmeron@cars3.uchicago.edu
electronics forum beginner


Joined: 08 Dec 2005
Posts: 27

PostPosted: Tue Jul 18, 2006 4:21 am    Post subject: Re: What are the obstacles to building a pen-sized free-electron laser? Reply with quote

In article <6h1uo3-2hp.ln1@mail.specsol.com>, jimp@specsol.spam.sux.com writes:
Quote:
In sci.physics Radium <glucegen1@excite.com> wrote:
Hi:

All laser pointers in the market use diode-lasers. What makes it so
difficult to make a pointer-sized free-electron laser?


Thanks,

Radium

You mean other than the size of stuff like vacuum pumps, high voltage
power supplies, and shielding required to generate a relativistic
electron beam?

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


Mati Meron | "When you argue with a fool,
meron@cars.uchicago.edu | chances are he is doing just the same"
Back to top
jimp@specsol.spam.sux.com
electronics forum beginner


Joined: 17 Jan 2006
Posts: 36

PostPosted: Tue Jul 18, 2006 4:45 am    Post subject: Re: What are the obstacles to building a pen-sized free-electron laser? Reply with quote

In sci.physics mmeron@cars3.uchicago.edu wrote:
Quote:
In article <6h1uo3-2hp.ln1@mail.specsol.com>, jimp@specsol.spam.sux.com writes:
In sci.physics Radium <glucegen1@excite.com> wrote:
Hi:

All laser pointers in the market use diode-lasers. What makes it so
difficult to make a pointer-sized free-electron laser?


Thanks,

Radium

You mean other than the size of stuff like vacuum pumps, high voltage
power supplies, and shielding required to generate a relativistic
electron beam?

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

Not to pick nits, but doesn't that require vacuum pumps, high voltage
power supplies, and shielding?

Well, yeah, there is that pesky enclosure containing the electrons.

--
Jim Pennino

Remove .spam.sux to reply.
Back to top
Don Klipstein
electronics forum Guru Wannabe


Joined: 02 May 2005
Posts: 297

PostPosted: Tue Jul 18, 2006 5:02 am    Post subject: Re: What are the obstacles to building a pen-sized free-electron laser? Reply with quote

In <1153192138.781448.283830@p79g2000cwp.googlegroups.com>, Radium wrote:
Quote:

All laser pointers in the market use diode-lasers. What makes it so
difficult to make a pointer-sized free-electron laser?

Major bigtime vacuum electron tube technology with bigtime high
voltage, with some major magnets.

I surely suspect better chances at esoteric semiconductor devices to do
that job more economically, should you want a laser pointer with
wavelength other than the roughly 650 nm red from diode lasers that some
dollar stores sell!

Heck, DPSS 532 nm green laser pointers (second harmonic of 1064 nm IR Nd
laser line) can be had for under $100 USD. And I suspect that laser
pointers with blue-violet wavelength close to 410 nm and of similar price
are no more than a year or two away - such laser diodes will be used in
the players of the next-generation optical discs that are supposed to hit
the market by the end of 2006!

- Don Klipstein (don@misty.com)
Back to top
mmeron@cars3.uchicago.edu
electronics forum beginner


Joined: 08 Dec 2005
Posts: 27

PostPosted: Tue Jul 18, 2006 5:53 am    Post subject: Re: What are the obstacles to building a pen-sized free-electron laser? Reply with quote

In article <kh5uo3-hg6.ln1@mail.specsol.com>, jimp@specsol.spam.sux.com writes:
Quote:
In sci.physics mmeron@cars3.uchicago.edu wrote:
In article <6h1uo3-2hp.ln1@mail.specsol.com>, jimp@specsol.spam.sux.com writes:
In sci.physics Radium <glucegen1@excite.com> wrote:
Hi:

All laser pointers in the market use diode-lasers. What makes it so
difficult to make a pointer-sized free-electron laser?


Thanks,

Radium

You mean other than the size of stuff like vacuum pumps, high voltage
power supplies, and shielding required to generate a relativistic
electron beam?

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

Not to pick nits, but doesn't that require vacuum pumps, high voltage
power supplies, and shielding?

Sure. As well as RF cavities, power supplies for those, Steering

magnets (again with power supplies), quadrupoles, sextapoles and all
sorts of poles (again...), and then we get to the undulators.

Quote:
Well, yeah, there is that pesky enclosure containing the electrons.

Yes, that too:-) And the operators' room with the coffee machine.


Mati Meron | "When you argue with a fool,
meron@cars.uchicago.edu | chances are he is doing just the same"
Back to top
jmfbahciv@aol.com
electronics forum addict


Joined: 30 Oct 2005
Posts: 60

PostPosted: Tue Jul 18, 2006 9:59 am    Post subject: Re: What are the obstacles to building a pen-sized free-electron laser? Reply with quote

In article <rH_ug.13$25.190@news.uchicago.edu>,
mmeron@cars3.uchicago.edu wrote:
Quote:
In article <kh5uo3-hg6.ln1@mail.specsol.com>, jimp@specsol.spam.sux.com
writes:
In sci.physics mmeron@cars3.uchicago.edu wrote:
In article <6h1uo3-2hp.ln1@mail.specsol.com>, jimp@specsol.spam.sux.com
writes:
In sci.physics Radium <glucegen1@excite.com> wrote:
Hi:

All laser pointers in the market use diode-lasers. What makes it so
difficult to make a pointer-sized free-electron laser?


Thanks,

Radium

You mean other than the size of stuff like vacuum pumps, high voltage
power supplies, and shielding required to generate a relativistic
electron beam?

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

Not to pick nits, but doesn't that require vacuum pumps, high voltage
power supplies, and shielding?

Sure. As well as RF cavities, power supplies for those, Steering
magnets (again with power supplies), quadrupoles, sextapoles and all
sorts of poles (again...), and then we get to the undulators.

Well, yeah, there is that pesky enclosure containing the electrons.

Yes, that too:-) And the operators' room with the coffee machine.

How many babysitters are needed?

/BAH
Back to top
C what I mean
electronics forum beginner


Joined: 18 Jul 2006
Posts: 3

PostPosted: Tue Jul 18, 2006 12:04 pm    Post subject: Re: What are the obstacles to building a pen-sized free-electron laser? Reply with quote

Quote:

All laser pointers in the market use diode-lasers. What makes it so
difficult to make a pointer-sized free-electron laser?


Finding pointer-sized free-electrons!
Back to top
Radium
electronics forum addict


Joined: 11 May 2006
Posts: 95

PostPosted: Tue Jul 18, 2006 2:58 pm    Post subject: Re: What are the obstacles to building a pen-sized free-electron laser? Reply with quote

mmeron@cars3.uchicago.edu wrote:
Quote:
In article <6h1uo3-2hp.ln1@mail.specsol.com>, jimp@specsol.spam.sux.com writes:
In sci.physics Radium <glucegen1@excite.com> wrote:
Hi:

All laser pointers in the market use diode-lasers. What makes it so
difficult to make a pointer-sized free-electron laser?


Thanks,

Radium

You mean other than the size of stuff like vacuum pumps, high voltage
power supplies, and shielding required to generate a relativistic
electron beam?

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:
Mati Meron | "When you argue with a fool,
meron@cars.uchicago.edu | chances are he is doing just the same"
Back to top
jimp@specsol.spam.sux.com
electronics forum beginner


Joined: 17 Jan 2006
Posts: 36

PostPosted: Tue Jul 18, 2006 3:55 pm    Post subject: Re: What are the obstacles to building a pen-sized free-electron laser? Reply with quote

In sci.physics Radium <glucegen1@excite.com> wrote:

Quote:
mmeron@cars3.uchicago.edu wrote:
In article <6h1uo3-2hp.ln1@mail.specsol.com>, jimp@specsol.spam.sux.com writes:
In sci.physics Radium <glucegen1@excite.com> wrote:
Hi:

All laser pointers in the market use diode-lasers. What makes it so
difficult to make a pointer-sized free-electron laser?


Thanks,

Radium

You mean other than the size of stuff like vacuum pumps, high voltage
power supplies, and shielding required to generate a relativistic
electron beam?

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?

In comic books and scifi movies.

--
Jim Pennino

Remove .spam.sux to reply.
Back to top
Eeyore
electronics forum Guru


Joined: 22 Jun 2006
Posts: 642

PostPosted: Tue Jul 18, 2006 4:02 pm    Post subject: Re: What are the obstacles to building a pen-sized free-electron laser? Reply with quote

Radium wrote:

Quote:
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?

Is it possible to stick an inspection scope up your nose to see if you skull is as
empty as your posts suggest ?

Graham
Back to top
Eeyore
electronics forum Guru


Joined: 22 Jun 2006
Posts: 642

PostPosted: Tue Jul 18, 2006 4:04 pm    Post subject: Re: What are the obstacles to building a pen-sized free-electron laser? Reply with quote

jimp@specsol.spam.sux.com wrote:

Quote:
In sci.physics Radium <glucegen1@excite.com> wrote:


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?

In comic books and scifi movies.

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

If we did that to Radium they could take out his remaining brain cells with a laser
cannon !

Graham
Back to top
Steve
electronics forum beginner


Joined: 18 Jul 2006
Posts: 1

PostPosted: Tue Jul 18, 2006 4:37 pm    Post subject: Re: What are the obstacles to building a pen-sized free-electron laser? Reply with quote

In article <44BC56F3.70B121B0@REMOVETHIS.hotmail.com>,
Eeyore <rabbitsfriendsandrelations@REMOVETHIS.hotmail.com> wrote:
Quote:

Because electrons aren't really free. They cost lots of money.

The electrons are free. But the laser is really expensive.

--
Steve
Back to top
Google

Back to top
Display posts from previous:   
Post new topic   Reply to topic Page 1 of 4 [48 Posts] Goto page:  1, 2, 3, 4 Next
View previous topic :: View next topic
The time now is Thu Aug 24, 2017 10:29 am | All times are GMT
Forum index » Electronix » Basics
Jump to:  

Similar Topics
Topic Author Forum Replies Last Post
No new posts Free Porn New Resource MovieJerker Basics 0 Tue Apr 27, 2010 10:37 pm
No new posts laser pickup installation eledora Repair 0 Thu Jul 17, 2008 1:29 am
No new posts building a 220 voltage source itpurt@gmail.com Basics 6 Wed Jul 19, 2006 2:15 am
No new posts Any decent free electrical cad programs out there ??? cornytheclown@hotmail.com cad 26 Sun Jul 16, 2006 1:23 am
No new posts light sensitive cell as pixel free ccd and interferometry... mustafa umut sarac design 2 Fri Jul 14, 2006 5:21 pm

Copyright © 2004-2005 DeniX Solutions SRL
Other DeniX Solutions sites: Unix/Linux blog |  Unix/Linux documentation |  Unix/Linux forums |  Medicine forum |  Science forum  |  Send and track newsletters


Powered by phpBB © 2001, 2005 phpBB Group