[ RadSafe ] Space Travel (Fission, Fusion, etc.)
JPreisig at aol.com
JPreisig at aol.com
Sat Dec 10 22:57:49 CST 2005
This is from: jpreisig at aol.com .
Hope all is well with you. A while back, someone was asking about
travel to the Moon and/or Mars, and Cosmic Rays and all that. The
archives should have considerable e-mail discussion of these matters,
especially concerning the use of fission/fusion propulsion.
Consult the archives, if you wish.
For fundamental discussions of Cosmic Rays, charged particles,
neutral particles, please read: Patterson & Thomas "Accelerator Health
Physics" and the Accelerator Health Physics course notes by Coissairt.
Flights to Mars using chemical propulsion probably take too long
for sane astronauts. Fission/Fusion propulsion flights would
quicker. Mr./Dr. Facius's recent comments about cosmic rays are
probably in the recent radsafe archives. Clearly, if one uses
propulsion, one might have to limit maximum spacecraft accelerations,
to not injure astronauts. I don't know how reasonable it is to have an
shielded area in a spacecraft, because I don't know how quickly
astronauts could be warned about dangerous cosmic rays, solar flares
and the like. Such cosmic ray phenomena might possibly be lethal.
Space flight is still a dangerous business --- if one examines the
Mercury (NASA) capsules, one will probably appreciate the bravery of the
Clearly, charged particles will be shielded using high Z
neutrons can be shielded using hydrogenous materials (polyethylene,
As for somebody's son wanting to be a spacecraft pilot, Go For It.
NASA's websites probably have information on Pilot and/or mission
specialist requirements. If your kid has eyeglasses already, think
not applying. NASA pilots need considerable flight hour training and
pilot (hour) experience.
There is at least one fission propelled spacecraft (recent
Prometheus???). See the internet for more information.
Best wishes for safe and happy holidays....INL (formerly INEL ---
appears to be getting the nod for US reactor development for future
Take care. Joseph R. (Joe) Preisig, Ph.D.
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