XPost: sci.physics, sci.military.naval   
   From: iinvalid@invalid.com   
      
   On 6/20/2017 12:31 PM, Robert Clark wrote:   
   > "Robert Clark"  wrote in message news:oi3a88$nck$1@dont-email.me...   
   > =======================================================================   
   > At the distance of the Parker probe, a 1 km sq. mirror could collect a   
   > terawatt of power for beamed propulsion or space solar power beamed to   
   > Earth.   
      
   >   
   > The Parker probe will use a refrigeration system to lower the   
   > temperature of   
   > the components of the spacecraft from 1,400 C to room temperature. This is   
   > about the same temperature drop as the temperature drop from the Sun’s   
   > surface to the maximum temperature of our high temperature ceramics. So it   
   > should be possible to do this temperature drop on the surface of the Sun   
   > using our highest temperature ceramics.   
      
   refrigeration wont work. if reflectivity is 99.9% you still ave to move   
   how many terrawatts(?) from front to back of the spacecraft, AND radiate   
   that out to cold space on the backside ??   
      
   also Gamma rays are going to cook it, +fry electonics.   
   what are the gamma ray radiation levels close to the sun ?   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)