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#151 2004-11-15 18:24:17

GCNRevenger
Member
From: Earth
Registered: 2003-10-14
Posts: 6,056

Re: New type of accelerator

No, not they wouldn't. There isn't a practical way to collect a very large amount of UV radiation other then a super giant mega solar sail, in which case you wouldn't bother with the UV ionization engine.

In any event, the amount of energy from the sun total much beyond Earth isn't going to be enough to push your rocket anyway.


[i]"The power of accurate observation is often called cynicism by those that do not have it." - George Bernard Shaw[/i]

[i]The glass is at 50% of capacity[/i]

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#152 2004-11-15 18:26:30

ERRORIST
Member
From: OXFORD ALABAMA
Registered: 2004-01-28
Posts: 1,182

Re: New type of accelerator

nuclear?

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#153 2004-11-15 18:34:33

GCNRevenger
Member
From: Earth
Registered: 2003-10-14
Posts: 6,056

Re: New type of accelerator

Okay, now we're back to square one again, using a nuclear reactor to power a laser to power an electron accelerator to power an ion accelerator to push the rocket.

This Rube Goldberg style schema will doubtlessly throw away most of the energy actually produced by the reactor due to all the conversion steps. Just using a regular old fashioned ion engine or a VASIMR would be better.

You are also again bound by the tradeoff between fuel efficency and thrust, since you can't have both without an extremely powerful reactor, which will then be extremely heavy and you won't get anywhere. Except bankrupt.


[i]"The power of accurate observation is often called cynicism by those that do not have it." - George Bernard Shaw[/i]

[i]The glass is at 50% of capacity[/i]

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#154 2004-11-15 18:46:06

ERRORIST
Member
From: OXFORD ALABAMA
Registered: 2004-01-28
Posts: 1,182

Re: New type of accelerator

The ions exhaust would be near one thousand times that of vasimr

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#155 2004-11-15 18:50:46

GCNRevenger
Member
From: Earth
Registered: 2003-10-14
Posts: 6,056

Re: New type of accelerator

The ion exhaust what? 1,000 times more mass, more velocity, or what?

Sure you could reach these extremely high figures with a very large accelerator engine powerd by a very very very large reactor(s), but the problem is that it would all weigh so much that your vehicle would be so heavy that VASIMR would be better.


[i]"The power of accurate observation is often called cynicism by those that do not have it." - George Bernard Shaw[/i]

[i]The glass is at 50% of capacity[/i]

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#156 2004-11-15 18:53:06

ERRORIST
Member
From: OXFORD ALABAMA
Registered: 2004-01-28
Posts: 1,182

Re: New type of accelerator

exhaust velocity.
vasimr needs a 65 mw reactor to get to Mars in a month

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#157 2004-11-15 19:06:16

GCNRevenger
Member
From: Earth
Registered: 2003-10-14
Posts: 6,056

Re: New type of accelerator

Then you are going to need tens of gigawatts to produce that same thrust with much higher exhaust velocity. We've been over this before Errorist, you will need VAST quantities of power to make your engine work.


[i]"The power of accurate observation is often called cynicism by those that do not have it." - George Bernard Shaw[/i]

[i]The glass is at 50% of capacity[/i]

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#158 2004-11-15 20:25:46

ERRORIST
Member
From: OXFORD ALABAMA
Registered: 2004-01-28
Posts: 1,182

Re: New type of accelerator

So where in this formula is watts mentioned?

hv=hv'+(m-mo)c2

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#159 2004-11-15 20:45:19

GCNRevenger
Member
From: Earth
Registered: 2003-10-14
Posts: 6,056

Re: New type of accelerator

Errorist, you don't even know what your own equation means.

Look, accept it, you have had it explained to you three times now that the conservation of energy is obeyed when photons accelerate electrons, that the acceleration of the electron is dependant on the energy of the photon which is dependant on the energy injected into the system.

There is no trick. No Trick. Where photons cause a radical acceleration of other particles with larger kenetic energy change then is carried by the photon.

The law of the conservation of energy is the cornerstone of physics: it applies to all physical systems where energy is converted or transferred, and it is never wrong.


[i]"The power of accurate observation is often called cynicism by those that do not have it." - George Bernard Shaw[/i]

[i]The glass is at 50% of capacity[/i]

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#160 2004-11-15 21:11:35

ERRORIST
Member
From: OXFORD ALABAMA
Registered: 2004-01-28
Posts: 1,182

Re: New type of accelerator

Not my equation. But the way they explain it it doesn't talk about watts. How many watts to create 10,000 ev?

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#161 2004-11-15 21:16:36

Euler
Member
From: Corvallis, OR
Registered: 2003-02-06
Posts: 922

Re: New type of accelerator

10,000 eV = 1.6*10^-15 J

So if you have 1 watt for 1.6*10^-15 seconds you will have 10,000 eV of energy.

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#162 2004-11-15 21:22:16

ERRORIST
Member
From: OXFORD ALABAMA
Registered: 2004-01-28
Posts: 1,182

Re: New type of accelerator

If it is ever wrong that doesn't make it wrong.

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#163 2004-11-15 21:27:53

ERRORIST
Member
From: OXFORD ALABAMA
Registered: 2004-01-28
Posts: 1,182

Re: New type of accelerator

10,000 eV = 1.6*10^-15 J

So if you have 1 watt for 1.6*10^-15 seconds you will have 10,000 eV of energy.

This is the energy needed per photon to be created?

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