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Dr. Brian Laubscher, Sunday, 6-8-14 June 9, 2014

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Dr. Brian Laubscher, Sunday, 6-8-14

http://archived.thespaceshow.com/shows/2258-BWB-2014-06-08.mp3

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Guest:  Dr. Bryan Laubscher.  Topics:  Carbon nanotubes, new manufacturing, Space Elevator.  Please direct all comments and questions regarding Space Show programs/guest(s) to the Space Show blog, http://thespaceshow.wordpress.com.  Comments and questions should be relevant to the specific Space Show program. Written Transcripts of Space Show programs are a violation of our copyright and are not permitted without prior written consent, even if for your own use. We do not permit the commercial use of Space Show programs or any part thereof, nor do we permit editing, YouTube clips, or clips placed on other private channels & websites. Space Show programs can be quoted, but the quote must be cited or referenced using the proper citation format. Contact The Space Show for further information. In addition, please remember that your Amazon purchases can help support The Space Show/OGLF. See http://www.onegiantleapfoundation.org/amazon.htm.   For those listening to archives using live365.com and rating the programs, please email me as to why you assign a specific rating to the show. This will help me bring better programming to the audience.

We welcomed Dr. Bryn Laubscher back to the program for our 2 hour 22 minute discussion about carbon nanotubes and the Space Elevator.  During our first segment, Dr. Laubscher talked about carbon nanotubes, the manufacturing process, how to move the process and technology forward, end uses for the product, possible timelines for advancement and the current day use of Chemical Vapor Deposition (CVD) in the process.  Bryan talked about the need to find a better process for making carbon nanotubes than CVD.  Later is this segment, Dr. Laubscher was asked about the potential relationship to space other than with the space elevator.  This was an interesting discussion , don’t miss it.

In our second segment, Bryan talked about how hard and challenging the space elevator was and later in the segment, due to a call from Pooley, we went through many of the top challenges faced by the elevator with a status report on each one.  As this segment was opening, I did ask Bryan for a time line for space elevator advancement.  Our guest suggested that at some point, there would be significant demand for the elevator.  Next, we talked about the upcoming International Space Elevator 2014 Conference to be held at the Museum of Flight in Seattle, August 22-24, 2014.  For conference info, visit http://www.spaceelevatorconference.org. John from Ft. Worth called to talk about materials, composites and much more. We also talked about the strength needed for the elevator ribbon and John asked about SSTO.  Blaze emailed us about nuclear waste and Bryan had an interesting take on it. This was another valuable discussion, don’t miss it.  Dr. Laubscher talked about ribbon length, characteristics, strength needed, and its location in space, plus the counter weights it would need.  Adrian emailed several questions to us about the ribbon breaking and related issues.  He also asked our guest radiation issues.  Doug emailed about ways to climb up and down the ribbon.  Some of the other issues that came up were wind, lightening, ribbon oscillation, space debris, policy & regulatory issues.  As our program was ending, Bryan offered us words of wisdom and said his company website was http://www.odysseustech.com.  In addition, Dr. Peter Swan emailed us about his paper on the elevator which you can download and read at  http://www.virginiaedition.com/media/spaceelevators.pdf.

Post your comments/questions on TSS blog.  You can reach Dr. Laubscher through his website or me.

Dr. Marcelo Vazquez, Friday, 11-23-12 November 23, 2012

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Dr. Marcelo Vazquez, Friday, 11-23-12

http://archived.thespaceshow.com/shows/1899-BWB-2012-11-23.mp3

Guest:  Dr. Marcelo Vazquez.  Topic: Galactic cosmic radiation & human spaceflight in deep space.  Please direct all comments and questions regarding Space Show programs/guest(s) to the Space Show blog, http://thespaceshow.wordpress.com. Comments and questions should be relevant to the specific Space Show program. Written Transcripts of Space Show programs are a violation of our copyright and are not permitted without prior written consent, even if for your own use. We do not permit the commercial use of Space Show programs or any part thereof, nor do we permit editing, YouTube clips, or clips placed on other private channels & websites. Space Show programs can be quoted, but the quote must be cited or referenced using the proper citation format. Contact The Space Show for further information. We welcomed back Dr. Marcelo Vazquez for deep space radiation updates since his last visit to the show on August 22, 2006.  In our first segment, Dr. Vazquez updated us with new information about Martian surface radiation due to the instruments on board Curiosity now roving on Mars. We talked about the meanings of the findings so far and the good news for astronauts visiting Mars as we are learning that being on the surface will likely be doable.  We then talked about transit times to and from Mars and why that presents a different set of radiation challenges.  For our discussion, we only referenced existing, operational propulsion – chemical propulsion.  We did not talk about advanced propulsion travel times or nuclear propulsion travel times as our focus was on what was available today, not what may be available in the near or intermediate term.  The Galactic Cosmic Radiation (GCR) is a problem with lots of unknowns.  A further complication is a solar event but that could probably be shielded for with an onboard shelter. Not so with the GCR.  Dr. Vazquez even pointed out that GCR may cause an incomplete mission as it impacts the central nervous system & that might be a bigger risk than cancer at the end of the mission.  Listeners emailed & called with radiation questions, even asking about the difference in GCR and radiation here on Earth.  Other topics addressed in this segment included the use of older astronauts given they might suffer less radiation damage than a younger person, cell damage and division, timelines for potential solutions, & space settlement/family issues in light of what we know about space radiation today.
       In our second segment, we talked about Cislunar space, EML1, EML2, the lunar surface and NEOs in light of radiation dangers for astronauts.  The ISS was discussed within the context of Martian surface radiation, along with the South Atlantic Anomaly and polar/equatorial radiation on Earth. Listener Bruce emailed about Marcelo “slightly over stating space radiation.”  I read the email on air so do listen to the response given to Bruce.  Dr. Vazquez then talked about the NASA guidelines & the number of safe deep space radiation days for an adult male and an adult female (they differ).  Near the end, a NYC first responder called in about possible radiation incidents in NYC & treatments available, including new medicines.  At the end, I asked out guest for success indicators. We were directed to note the biologic focus given GCR can directly impact a molecule.  We concluded with a short update on radiation used in cancer treatment including proton and carbon ion therapy.  In summary, no show stoppers but lots of challenges that Dr. Vazquez believes will be resolved through future research.
     Please post our comments/questions on The Space Show blog URL.  If you want to reach our guest, you can do so through me.
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