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Radium
electronics forum addict
Joined: 11 May 2006
Posts: 95
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 Posted: Tue Jul 18, 2006 3:08 am Post subject:
What are the obstacles to building a pen-sized free-electron laser?
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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 |
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Eeyore
electronics forum Guru
Joined: 22 Jun 2006
Posts: 642
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| Posted: Tue Jul 18, 2006 3:35 am Post subject:
Re: What are the obstacles to building a pen-sized free-electron laser?
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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?
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Because electrons aren't really free. They cost lots of money.
Graham |
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Norm Grimpo
electronics forum beginner
Joined: 10 Jul 2006
Posts: 2
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| Posted: Tue Jul 18, 2006 3:37 am Post subject:
Re: What are the obstacles to building a pen-sized free-electron laser?
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"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?
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how much power ? |
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Radium
electronics forum addict
Joined: 11 May 2006
Posts: 95
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| Posted: Tue Jul 18, 2006 3:39 am Post subject:
Re: What are the obstacles to building a pen-sized free-electron laser?
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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 ?
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The same amount of power used by a conventionaly laser-pointer |
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jimp@specsol.spam.sux.com
electronics forum beginner
Joined: 17 Jan 2006
Posts: 36
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| Posted: Tue Jul 18, 2006 3:45 am Post subject:
Re: What are the obstacles to building a pen-sized free-electron laser?
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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?
|
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. |
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mmeron@cars3.uchicago.edu
electronics forum beginner
Joined: 08 Dec 2005
Posts: 27
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| Posted: Tue Jul 18, 2006 4:21 am Post subject:
Re: What are the obstacles to building a pen-sized free-electron laser?
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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" |
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jimp@specsol.spam.sux.com
electronics forum beginner
Joined: 17 Jan 2006
Posts: 36
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| Posted: Tue Jul 18, 2006 4:45 am Post subject:
Re: What are the obstacles to building a pen-sized free-electron laser?
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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.
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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. |
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Don Klipstein
electronics forum Guru Wannabe
Joined: 02 May 2005
Posts: 297
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| Posted: Tue Jul 18, 2006 5:02 am Post subject:
Re: What are the obstacles to building a pen-sized free-electron laser?
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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) |
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mmeron@cars3.uchicago.edu
electronics forum beginner
Joined: 08 Dec 2005
Posts: 27
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| Posted: Tue Jul 18, 2006 5:53 am Post subject:
Re: What are the obstacles to building a pen-sized free-electron laser?
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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" |
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jmfbahciv@aol.com
electronics forum addict
Joined: 30 Oct 2005
Posts: 60
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| Posted: Tue Jul 18, 2006 9:59 am Post subject:
Re: What are the obstacles to building a pen-sized free-electron laser?
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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.
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How many babysitters are needed?
/BAH |
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C what I mean
electronics forum beginner
Joined: 18 Jul 2006
Posts: 3
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| Posted: Tue Jul 18, 2006 12:04 pm Post subject:
Re: What are the obstacles to building a pen-sized free-electron laser?
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| 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! |
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Radium
electronics forum addict
Joined: 11 May 2006
Posts: 95
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| Posted: Tue Jul 18, 2006 2:58 pm Post subject:
Re: What are the obstacles to building a pen-sized free-electron laser?
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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.
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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?
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jimp@specsol.spam.sux.com
electronics forum beginner
Joined: 17 Jan 2006
Posts: 36
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| Posted: Tue Jul 18, 2006 3:55 pm Post subject:
Re: What are the obstacles to building a pen-sized free-electron laser?
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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?
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In comic books and scifi movies.
--
Jim Pennino
Remove .spam.sux to reply. |
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Eeyore
electronics forum Guru
Joined: 22 Jun 2006
Posts: 642
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| Posted: Tue Jul 18, 2006 4:02 pm Post subject:
Re: What are the obstacles to building a pen-sized free-electron laser?
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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?
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Is it possible to stick an inspection scope up your nose to see if you skull is as
empty as your posts suggest ?
Graham |
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Eeyore
electronics forum Guru
Joined: 22 Jun 2006
Posts: 642
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| Posted: Tue Jul 18, 2006 4:04 pm Post subject:
Re: What are the obstacles to building a pen-sized free-electron laser?
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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.
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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 |
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