Lasers Question

On Oct 12, 3:20 pm, "Luke Campbell" <lwc....RemoveThis@gmail.com> wrote:
..
> Again, at tight focus, a Ti:sapphire pulse will damage glass, blasting
> out craters, just as it will to any other materials. Interestingly,
> the temperature of matter heated by these ultrashort pulses often
> reaches temperatures higher than that in the core of a detonating
> nuclear weapon or the heart of the sun. That's some significant energy
> density we're talking about!
>

> Luke

What is the effect of that kind of energy density on liquids? That is,
could we produce protection by placing a layer of flowing liquid
between target and gunner, so that new liquid flows steadily into the
intersection area even as the pulses vaporize what's there?


Shermanlee
 >> Stay informed about: Lasers Question 

On Oct 12, 3:20 pm, "Luke Campbell" <lwc....DeleteThis@gmail.com> wrote:
..
> Again, at tight focus, a Ti:sapphire pulse will damage glass, blasting
> out craters, just as it will to any other materials. Interestingly,
> the temperature of matter heated by these ultrashort pulses often
> reaches temperatures higher than that in the core of a detonating
> nuclear weapon or the heart of the sun. That's some significant energy
> density we're talking about!
>

> Luke

What is the effect of that kind of energy density on liquids? That is,
could we produce protection by placing a layer of flowing liquid
between target and gunner, so that new liquid flows steadily into the
intersection area even as the pulses vaporize what's there?


Shermanlee
 >> Stay informed about: Lasers Question 

On Oct 12, 3:20 pm, "Luke Campbell" <lwc....TakeThisOut@gmail.com> wrote:
..
> Again, at tight focus, a Ti:sapphire pulse will damage glass, blasting
> out craters, just as it will to any other materials. Interestingly,
> the temperature of matter heated by these ultrashort pulses often
> reaches temperatures higher than that in the core of a detonating
> nuclear weapon or the heart of the sun. That's some significant energy
> density we're talking about!
>

> Luke

What is the effect of that kind of energy density on liquids? That is,
could we produce protection by placing a layer of flowing liquid
between target and gunner, so that new liquid flows steadily into the
intersection area even as the pulses vaporize what's there?


Shermanlee
 >> Stay informed about: Lasers Question 

On Oct 12, 3:20 pm, "Luke Campbell" <lwc....TakeThisOut@gmail.com> wrote:
..
> Again, at tight focus, a Ti:sapphire pulse will damage glass, blasting
> out craters, just as it will to any other materials. Interestingly,
> the temperature of matter heated by these ultrashort pulses often
> reaches temperatures higher than that in the core of a detonating
> nuclear weapon or the heart of the sun. That's some significant energy
> density we're talking about!
>

> Luke

What is the effect of that kind of energy density on liquids? That is,
could we produce protection by placing a layer of flowing liquid
between target and gunner, so that new liquid flows steadily into the
intersection area even as the pulses vaporize what's there?


Shermanlee
 >> Stay informed about: Lasers Question 

On Oct 12, 3:20 pm, "Luke Campbell" <lwc....RemoveThis@gmail.com> wrote:
..
> Again, at tight focus, a Ti:sapphire pulse will damage glass, blasting
> out craters, just as it will to any other materials. Interestingly,
> the temperature of matter heated by these ultrashort pulses often
> reaches temperatures higher than that in the core of a detonating
> nuclear weapon or the heart of the sun. That's some significant energy
> density we're talking about!
>

> Luke

What is the effect of that kind of energy density on liquids? That is,
could we produce protection by placing a layer of flowing liquid
between target and gunner, so that new liquid flows steadily into the
intersection area even as the pulses vaporize what's there?


Shermanlee
 >> Stay informed about: Lasers Question 

On Oct 12, 3:20 pm, "Luke Campbell" <lwc....RemoveThis@gmail.com> wrote:
..
> Again, at tight focus, a Ti:sapphire pulse will damage glass, blasting
> out craters, just as it will to any other materials. Interestingly,
> the temperature of matter heated by these ultrashort pulses often
> reaches temperatures higher than that in the core of a detonating
> nuclear weapon or the heart of the sun. That's some significant energy
> density we're talking about!
>

> Luke

What is the effect of that kind of energy density on liquids? That is,
could we produce protection by placing a layer of flowing liquid
between target and gunner, so that new liquid flows steadily into the
intersection area even as the pulses vaporize what's there?


Shermanlee
 >> Stay informed about: Lasers Question 

On Oct 12, 3:20 pm, "Luke Campbell" <lwc... RemoveThis @gmail.com> wrote:
..
> Again, at tight focus, a Ti:sapphire pulse will damage glass, blasting
> out craters, just as it will to any other materials. Interestingly,
> the temperature of matter heated by these ultrashort pulses often
> reaches temperatures higher than that in the core of a detonating
> nuclear weapon or the heart of the sun. That's some significant energy
> density we're talking about!
>

> Luke

What is the effect of that kind of energy density on liquids? That is,
could we produce protection by placing a layer of flowing liquid
between target and gunner, so that new liquid flows steadily into the
intersection area even as the pulses vaporize what's there?


Shermanlee
 >> Stay informed about: Lasers Question 

On Oct 12, 3:20 pm, "Luke Campbell" <lwc... DeleteThis @gmail.com> wrote:
..
> Again, at tight focus, a Ti:sapphire pulse will damage glass, blasting
> out craters, just as it will to any other materials. Interestingly,
> the temperature of matter heated by these ultrashort pulses often
> reaches temperatures higher than that in the core of a detonating
> nuclear weapon or the heart of the sun. That's some significant energy
> density we're talking about!
>

> Luke

What is the effect of that kind of energy density on liquids? That is,
could we produce protection by placing a layer of flowing liquid
between target and gunner, so that new liquid flows steadily into the
intersection area even as the pulses vaporize what's there?


Shermanlee
 >> Stay informed about: Lasers Question 

On Oct 12, 3:20 pm, "Luke Campbell" <lwc... DeleteThis @gmail.com> wrote:
..
> Again, at tight focus, a Ti:sapphire pulse will damage glass, blasting
> out craters, just as it will to any other materials. Interestingly,
> the temperature of matter heated by these ultrashort pulses often
> reaches temperatures higher than that in the core of a detonating
> nuclear weapon or the heart of the sun. That's some significant energy
> density we're talking about!
>

> Luke

What is the effect of that kind of energy density on liquids? That is,
could we produce protection by placing a layer of flowing liquid
between target and gunner, so that new liquid flows steadily into the
intersection area even as the pulses vaporize what's there?


Shermanlee
 >> Stay informed about: Lasers Question 

On Oct 12, 3:20 pm, "Luke Campbell" <lwc....RemoveThis@gmail.com> wrote:
..
> Again, at tight focus, a Ti:sapphire pulse will damage glass, blasting
> out craters, just as it will to any other materials. Interestingly,
> the temperature of matter heated by these ultrashort pulses often
> reaches temperatures higher than that in the core of a detonating
> nuclear weapon or the heart of the sun. That's some significant energy
> density we're talking about!
>

> Luke

What is the effect of that kind of energy density on liquids? That is,
could we produce protection by placing a layer of flowing liquid
between target and gunner, so that new liquid flows steadily into the
intersection area even as the pulses vaporize what's there?


Shermanlee
 >> Stay informed about: Lasers Question 

Johnny1a wrote:
>
> On Oct 12, 3:20 pm, "Luke Campbell" <lwc....RemoveThis@gmail.com> wrote:
> .
>
>>Again, at tight focus, a Ti:sapphire pulse will damage glass, blasting
>>out craters, just as it will to any other materials. Interestingly,
>>the temperature of matter heated by these ultrashort pulses often
>>reaches temperatures higher than that in the core of a detonating
>>nuclear weapon or the heart of the sun. That's some significant energy
>>density we're talking about!
>>
>
>
>>Luke
>
>
> What is the effect of that kind of energy density on liquids? That is,
> could we produce protection by placing a layer of flowing liquid
> between target and gunner, so that new liquid flows steadily into the
> intersection area even as the pulses vaporize what's there?
>
>
> Shermanlee
>

The physics involved is the heat absorption of the material as it
undergoes phase change, coupled with the amount of heat transfered to
the surrounding area via conduction. Water, for example has a high heat
of absorption, but does not conduct heat as readily as other materials,
copper for example. Lots of research has been done on this as a part of
energy storage and transfer. Flow introduces the third aspect, where the
amount of material being heated at any instant changes before reaching
the overload point - the effect used by the car industry (and heat pumps
with freon) with water circulation through the engine block which is
then transfered (exchanged) to the air by radiators.

As far as the laser is concerned, easier to reflect or interrupt the
focus of the light beam than deal with the focal point energy.

Regards,
Roger
 >> Stay informed about: Lasers Question 

Johnny1a wrote:
>
> On Oct 12, 3:20 pm, "Luke Campbell" <lwc....RemoveThis@gmail.com> wrote:
> .
>
>>Again, at tight focus, a Ti:sapphire pulse will damage glass, blasting
>>out craters, just as it will to any other materials. Interestingly,
>>the temperature of matter heated by these ultrashort pulses often
>>reaches temperatures higher than that in the core of a detonating
>>nuclear weapon or the heart of the sun. That's some significant energy
>>density we're talking about!
>>
>
>
>>Luke
>
>
> What is the effect of that kind of energy density on liquids? That is,
> could we produce protection by placing a layer of flowing liquid
> between target and gunner, so that new liquid flows steadily into the
> intersection area even as the pulses vaporize what's there?
>
>
> Shermanlee
>

The physics involved is the heat absorption of the material as it
undergoes phase change, coupled with the amount of heat transfered to
the surrounding area via conduction. Water, for example has a high heat
of absorption, but does not conduct heat as readily as other materials,
copper for example. Lots of research has been done on this as a part of
energy storage and transfer. Flow introduces the third aspect, where the
amount of material being heated at any instant changes before reaching
the overload point - the effect used by the car industry (and heat pumps
with freon) with water circulation through the engine block which is
then transfered (exchanged) to the air by radiators.

As far as the laser is concerned, easier to reflect or interrupt the
focus of the light beam than deal with the focal point energy.

Regards,
Roger
 >> Stay informed about: Lasers Question 

Johnny1a wrote:
>
> On Oct 12, 3:20 pm, "Luke Campbell" <lwc... RemoveThis @gmail.com> wrote:
> .
>
>>Again, at tight focus, a Ti:sapphire pulse will damage glass, blasting
>>out craters, just as it will to any other materials. Interestingly,
>>the temperature of matter heated by these ultrashort pulses often
>>reaches temperatures higher than that in the core of a detonating
>>nuclear weapon or the heart of the sun. That's some significant energy
>>density we're talking about!
>>
>
>
>>Luke
>
>
> What is the effect of that kind of energy density on liquids? That is,
> could we produce protection by placing a layer of flowing liquid
> between target and gunner, so that new liquid flows steadily into the
> intersection area even as the pulses vaporize what's there?
>
>
> Shermanlee
>

The physics involved is the heat absorption of the material as it
undergoes phase change, coupled with the amount of heat transfered to
the surrounding area via conduction. Water, for example has a high heat
of absorption, but does not conduct heat as readily as other materials,
copper for example. Lots of research has been done on this as a part of
energy storage and transfer. Flow introduces the third aspect, where the
amount of material being heated at any instant changes before reaching
the overload point - the effect used by the car industry (and heat pumps
with freon) with water circulation through the engine block which is
then transfered (exchanged) to the air by radiators.

As far as the laser is concerned, easier to reflect or interrupt the
focus of the light beam than deal with the focal point energy.

Regards,
Roger
 >> Stay informed about: Lasers Question