Posted on by Nancy Atkinson

Testing New Technologies… In Space

NASA’s New Millennium Program (NMP) was conceived as a way to accelerate the use of advanced technologies into operational science missions. “It was recognized that there were significant investments being made by the United States in advanced technologies,” said Dr. Christopher Stevens, the Program Manager for NMP, “and that they had real applications to either reducing the cost or providing new capability for science missions.” However, bringing these technologies into actual science missions in space is a high risk because of the uncertainty that comes with emerging technology. NMP reduces those risks with validating new technology by flying and testing it in space. “We take technologies that are ready to go forward from the laboratory and mature them so they are ready to go to space,” said Stevens, “but the operational missions could be 10 to 20 years in the future.”

There are two types of missions or systems that NMP undertakes. One is an integrated system validation, where the whole flight system is the subject of the investigation. The second type is a subsystem validation mission, where small, stand alone experiments are carried on a space vehicle, but the vehicle is not part of the experiments.

NMP was jointly established in 1995 by NASA’s Office of Space Science and the Office of Earth Science, and in the past, missions were usually separated as being applicable to future Earth science or space science mission needs. NMP is now managed by NASA’s Science Mission Directorate, and focuses on the needs of three science areas: the Earth-Sun System, Solar System Exploration, and the Universe.

The program began with the Deep Space 1 mission in 1998, which was a space science, integrated system validation. DS1’s defining technology was solar electric, or ion, propulsion. “It was known that this technology had a capability to reduce the mass needed for propulsion over conventional chemical propulsion, but nobody wanted to take the risk of flying it untested in space,” said Stevens. DS1 successfully proved the effectiveness of ion propulsion, and now subsequent missions will use this type of propulsion, including the upcoming Dawn mission.

Other successful NMP validations include improvements and cost reduction of LANDSAT-type satellites and the testing of an autonomous science spacecraft which has flight planning software that can be used on rovers as well as orbiting spacecraft to re-plan a robotic mission with no human intervention. Upcoming NMP missions yet to fly include a group of small satellites called nano-sats that will make simultaneous measurements from multiple places in space of Earth’s magnetosphere, and the testing of equipment to be used on the Laser Interferometer Space Antenna (LISA) mission, a joint mission between NASA and the European Space Agency. The only unsuccessful NMP mission to date was Deep Space 2, which was the Mars Microprobes that were part of the ill-fated Mars Polar Lander.

NASA recently announced the newest NMP mission, Space Technology 8, which is a subsystem validation project. It is a collection of four stand alone experiments that will travel to space on a small, low-cost, currently available spacecraft, dubbed a New Millennium carrier. The first experiment on ST8 is called Sail Mast, which is an ultra-light graphite mast. Applications for Sail Mast are spacecraft that require large membrane structures that need to be deployed, such as solar sails, telescope sunshades, large aperture optics, instrument booms, antennas or solar array assemblies. “There are a series of missions that have been identified on the NASA Roadmap for the future that could benefit from this capability,” said Stevens. “This will be a significant step forward in the mass of the structure. We are operating in a ? kg per meter mass range for a 30 or 40 meter boom that can be stowed compactly and has a reasonable stiffness.”

The second experiment is the Ultraflex Next Generation Solar Array System. This is a high power, extremely lightweight solar array. “This could be used for a mission that needs significant power in a lightweight, deployable array, such as for solar electric propulsion, or it could also be used on the surface of planetary bodies,” said Stevens. “We are looking at increasing the specific power of the array to greater than 170 watts per kilogram on an array that has at least 7 kilowatts of power.”

The third experiment is the Environmentally Adaptive Fault Tolerant Computing System. “Here the objective is to use commercial off the shelf processors configured in an architecture that is fault-tolerant to single event upsets caused by radiation,” said Stevens. “We want to show that this is a robust design that can be used in space without having to use radiation-hard parts, because you get a significant increase in processing speed and capability over currently available radiation-hard processors. We want to reduce the costs with high reliability.” This can be used for processing science data on board a spacecraft, and for autonomous control functions.

The final experiment on ST8 is the Miniature Loop Heat Pipe Small Thermal Management System. “What we want to do here is to reduce the thermal constraints on small spacecraft design and manage heat and the need for cooling without expending significant amounts of power,” said Stevens. This system proposes to efficiently manage thermal balance within the spacecraft by taking heat where it is being produced by, for example, electronics, and provide it to other places in the spacecraft that need heat. It has no moving parts and doesn’t require power.

The ST8 mission should be ready for launch in 2008.

In July of 2005 NASA plans to announce the technology providers for the next NMP mission. ST9 will be an integrated system validation mission. There are five different concepts that we are being considered, and all five are regarded as areas of high priority for NASA. They are:

– Solar Sail Flight System Technology
– Aerocapture System Technology for Planetary Missions
– Precision Formation Flying System Technology
– System Technology for Large Space Telescopes
– Terrain-Guided Automatic Landing System for Spacecraft

All five concepts will be studied over the next year. Following the completion of these studies, one of the five concepts will be selected for ST9. Launch time will depend on which concept is selected, but is tentatively in the 2008-2009 time frame.

Stevens has been with NMP since it was formed, and has been program manager for 3 years. He enjoys being able to demonstrate advanced technologies so that they can be incorporated into future missions. “It’s an exciting business, a very high risk business,” he said, “because advanced technology is so uncertain in regards to how long it will take and how much it will cost.” He said that the validation of the autonomous science spacecraft experiment has been especially rewarding. “The current Mars rovers are extremely labor-intensive, but NASA has not been willing to turn over the operation of a spacecraft to a software package, so I think this validation has been a major step.” Stevens said that his office has a technology infusion activity currently going on with the Mars program, looking at using this capability for future missions, like the Mars Science Laboratory rover, scheduled for launch in 2009.

Written by Nancy Atkinson

Posted on by Nancy Atkinson

Mini-Detector Could Find Life on Mars or Anthrax at the Airport

Image credit: ESA
Dr. David Ermer, with his company, Opti-MS Corporation, is currently constructing a miniature Time of Flight Mass Spectrometer that can detect biological signatures at a very high resolution and sensitivity, but yet be small enough to be used for robotic and human applications in space exploration.

Ermer is using an innovative system that he developed at Mississippi State University, and he has received a NASA Small Business Innovation Research (SBIR) award to continue his research to build and test his device.

A mass spectrometer is used to measure molecular weight to determine the structure and elemental composition of a molecule. A high-resolution mass spectrometer can determine masses very precisely, and can be used to detect such things as DNA/RNA fragments, whole proteins and peptides, digested protein fragments, and other biological molecules.

A Time of Flight Mass Spectrometer (TOF-MS) works by measuring the time it takes for ions to travel through a vacuum area of the device known as the flight tube. Time of flight mass spectrometry is based on the fact that for a fixed kinetic energy, the mass and the velocity of the ions are interrelated. “Electric fields are used to give ions a known kinetic energy,” Ermer explained. “If you know the kinetic energy and know the distance the ions travel, and know how long it takes to travel, then you can determine the mass of the ions.”

Ermer’s device uses Matrix Assisted Laser Desorption Ionization, or MALDI, where a laser beam is directed at the sample to be analyzed, and the laser ionizes the molecules which then fly into the flight tube. The time of flight through the tube correlates directly to mass, with lighter molecules having a shorter time of flight than heavier ones.

The analyser and detector of the mass spectrometer are kept in a vacuum to let the ions travel from one end of the instrument to the other without any resistance from colliding with air molecules, which would alter the kinetic energy of the molecule.

A typical sample plate for a TOF-MS can hold between 100-200 samples, and the device can measure the complete mass distribution with one single shot. Therefore, huge amounts of data are created within a very short time interval, with the time of flight for most ions occurring in microseconds.

Ermer’s TOF-MS combines a relatively simple mechanical setup with extremely fast electronic data acquisition, along with the ability to measure very large masses, which is essential in doing biological analysis.

But the most unique aspect of Ermer’s device is its size. The commercial mass spectrometers that are currently available are at least one and a half meters long. That’s a fairly large volume to include on an in-situ scientific vehicle such as the golf car-sized Mars Exploration Rovers or even the larger Mars Science Laboratory Rover scheduled to launch in 2009. Ermer has devised a way to miniaturize a TOF-MS to an amazing 4? inches long. He estimates that his device will have a volume of less than 0.75 liters, a mass of less than 2 kilograms and require less than 5 watts of power.

Ermer used a non-linear optimization technique to create a computer model of a mass spectrometer. There were 13 parameters he input that had to be selected, including the spacing of the different elements in the TOF-MS and the ion acceleration voltages. Using this technique Ermer was able to find some unique solutions for a very short TOF-MS.

“I’m trying to build a Time of Flight Mass Spectrometer that is small enough to actually go in space,” Ermer said. “The main application that NASA is looking at is searching for biological molecules, to find evidence of past life on Mars. They also want to be able to do molecular biology on the space station, although the Mars application has a higher priority. My device should come in under all the requirements that NASA has, as far as the power, size, and weight requirements.”

Ermer also sees potential for his device to be used commercially as well. “What I have is a portable device to measure biological molecules,” he said. “If you were at an airport and found a white powder you’re going to want to know if it is anthrax or chalk dust fairly quickly. So you want a small, fairly cheap, portable device to be able to do that.” In his proposal to NASA, Ermer stated, “The main (commercial) application for miniature TOF-MS is the screening of infectious disease and biological agents. We also believe that the superior performance of our design will allow penetration into the general TOF-MS market.”

Ermer received the $70,000 SBIR award in mid-January, and has already built and tested a larger proof of concept design, which validates the technology that he designed for his TOF-MS. “So far, the tests have gone extremely well,” Ermer said. I have detected molecules up to 13,000 Daltons (Dalton is an alternate name for atomic mass unit, or amu.) The device is operating as designed for masses up to 13,000 Daltons and has mass resolution somewhat better than a full sized device at 13,000 Daltons. We are currently working on detecting mass out to 100,000 Daltons and initial results are promising.”

“Getting the device up and running is probably the biggest hurdle,” Ermer said about the challenges of this project. “A lot of the hard things are done, but the electronics are really difficult. For this device you have to generate high voltage pulses of about 16,000 volts. That was probably the hardest thing we’ve had to do so far.”

The electron multiplier detector is specially designed for miniature time of flight spectrometry by an outside company. Ermer and his own company designed most of the other parts of the device, including the vacuum housing and the laser extractor. Since it’s so small, creating these parts requires very high tolerance machining, which was also done by an outside company.

The NASA SBIR program “provides increased opportunities for small businesses to participate in research and development, to increase employment, and to improve U.S. competitiveness,” according to NASA. Some objectives of the program are to stimulate technological innovation, and to use small businesses to meet federal research and development needs. The program has three phases, with Phase I receiving $70,000 for six months of research to establish feasibility and technical merit. Projects making it to Phase II receive $600,000 for two more years of development, and Phase III provides commercialization of the product.

Ermer is a professor at Mississippi State University. He has been doing research in fields related to mass spectrometry since 1994, and for his PhD thesis at Washington State University, he looked at the energy distributions of ions that are generated in different materials by a laser. For his postdoctoral research at Vanderbilt, he studied the MALDI technique using an Infrared Free Electron Laser. More information about Opti-MS can be found at www.opti-ms.com.

Nancy Atkinson is a freelance writer and NASA Solar System Ambassador. She lives in Illinois.

Posted on by Nancy Atkinson

A Pristine View of the Universe… from the Moon

Image credit: University of Arizona
Over 30 years ago, Dr. Roger Angel came to the University of Arizona, drawn by the favorable conditions for astronomical observing in the Tucson, Arizona area: several telescopes are conveniently nearby, and of course, the weather is wonderfully temperate. But now, Angel proposes to build a telescope in a location somewhat more remote and not quite so balmy: a polar crater on the moon.

Known for his innovations in lightweight telescope mirrors and adaptive optics, Angel now leads a team of scientists from the U.S. and Canada who are exploring the feasibility of building a Deep-Field Infrared Observatory near one of the lunar poles using a Liquid Mirror Telescope (LMT).

This concept is one of 12 proposals that began receiving funding last October from the NASA Institute for Advanced Concepts (NIAC). Each gets $75,000 for six-months of research to make initial studies and identify challenges in development. Projects that make it through the first phase are eligible for as much as $400,000 more over two years.

LMTs are made by spinning a reflective liquid, usually mercury, on a bowl-shaped platform to form a parabolic surface, perfect for astronomical optics. Isaac Newton originally proposed the theory, but the technology to actually create such a device successfully has only recently been developed. Just a handful of LMTs are being used today, including a 6-meter LMT in Vancouver, Canada, and a 3-meter version that NASA uses for its Orbital Debris Observatory in New Mexico.

On Earth, LMTs are limited in size to about 6 meters in diameter because the self-generated wind that comes from spinning the telescope disturbs the surface. Additionally, like other Earth-based telescopes, LMTs are subject to atmospheric absorption and distortion, greatly reducing the range and sensitivity of infrared observing. But the atmosphere-free moon, Angel says, provides the perfect location for this type of telescope while supplying the gravity necessary for the parabolic mirror to form.

The potential of an LMT on the moon is to make a very big telescope. For reference, the Hubble Space Telescope has a 2.4 meter mirror, and the James Webb Space Telescope (JWST) being developed for launch in 2011 will have a 6 meter mirror. The concept for Angel’s NIAC proposal is a 20 meter mirror, but with the research the team has done so far, they are now looking at creating very large mirrors, with 100 meters being the big end option. They are considering smaller LMTs as well. “We obviously can’t go to the moon and make a 100 meter mirror the first thing,” Angel said. “We’re looking at a sequence of scale sizes of 2 meters, 20 meters, and 100 meters, and are looking at what the potential is for each one.” Angel believes the 2 meter telescope could be made without any human presence on the moon, and set up as a robotic telescope, much like the scientific instruments on the Mars rovers are operating now.

The limitation of a liquid mirror is that it only points straight up, so it’s not like a standard telescope that can be pointed in any direction and track objects in the sky. It only looks at the area of sky that is directly overhead.

So, the scientific goal for a LMT is to not look over the whole sky, but to take one area of space and look at it intensely. This type of astronomy has been very “profitable,” as Angel described it, in terms of the wealth of information that?s been gathered. Some of the most productive scientific efforts from the Hubble Space Telescope have been its “Deep Field” photographs.

To be able to look at only one area of space at all times drives Angel and his team to look to one of the lunar poles for the best location for this telescope. As at Earth’s poles, looking straight up from the poles on the moon always provides the same extragalactic field of view. “If we go to the North or South Pole of the moon, we?re going to image one patch of sky all the time, and so that allows you to make an extremely deep integration, much deeper even than the Hubble Deep Field.” Combine that with a large aperture, and this telescope would provide a depth of observation which would be unmatched with any telescope on Earth or in space. “That?s the niche or particular strength of this telescope,” Angel said.

Another upside of liquid mirrors is that they are very inexpensive compared to the process of making a standard mirror by creating, polishing and testing a big, rigid piece of glass, or creating smaller pieces which have to be polished, tested and then joined together very accurately. Also, LMTs don’t need expensive mounts, supports, tracking systems, or a dome.

“The total cost of the James Webb Telescope is expected to exceed a billion dollars, with the price tag on the mirror alone around a quarter of a million dollars,” Angel said. “That mirror is 6 meters, so if we scale that technology to even bigger mirrors in space, we?re eventually going to break the bank, and we won?t be able to afford them by the present technology of making the polished mirror and getting it up to space.”

Even though the 2 meter telescope would be a prototype, it would still be astronomically valuable. “We could do things that are complimentary to the Spitzer Space Telescope and the Webb Telescope, as the 2 meter telescope on the moon would fill the territory in between those two telescopes.” A 20 meter mirror would provide resolution 3 times greater than the JWST, and by integrating, or leaving the “shutter” open for long periods, like a year, objects 100 times fainter could be viewed. A 100 meter mirror would provide data that is off the charts.

One of the challenges in developing an LMT on the moon is to create the bearings to spin the platform smoothly and at a constant speed. Air bearings are used for LMTs on Earth, but with no air on the moon, that is impossible. Angel and his team are looking at cryogenic levitation bearings, similar to what?s used for magnetic levitation trains to get a frictionless motion by using a magnetic field. Angel added, “As a bonus, with the low temperatures on the moon you can do that without expending any energy because you can make a superconducting magnet that allows you to make a levitation bearing that doesn’t require a continuous input of electrical power.”

Angel called the bearings a critical component of the telescope. “With no air on the moon to create wind, there?s no limit to size or reaching the accuracy that you require as long as the bearing is alright,” Angel said.

One evolution of the project since receiving the NIAC funding is the location of the telescope. In the initial proposal, Angel’s team favored the south pole of the moon in the Shackleton crater. But the north pole actually offers a better field of view for extragalactic observation, they realized, and Angel awaits data from the European Space Agency’s SMART-1 lunar orbiter that recently began surveying the polar regions of the moon.

“In the polar regions there are some craters where the sun never illuminates and never heats the ground,” Angel said. “It is extremely cold there, not too far above absolute zero. Rather than build the telescope under such hostile conditions, we would attempt to build the telescope on a peak of the either of the poles, where there would be sunshine almost continuously. This would provide solar power and the conditions would be better for the people living there. All you have to do is put a cylindrical Mylar screen around the telescope to prevent the sun from ever hitting it and it will cool off just like in the bottom of the craters.”

With infrared observing, a cold telescope is vital to be able to see colder and fainter objects in space. Having the telescope at near absolute zero (0 degrees Kelvin, -273 C, -460 F) would be ideal. Since mercury will freeze at those temperatures, another challenge for the project is finding the right liquid to spin for the mirror. Some of the candidates are ethane, methane, and other small hydrocarbons, like the liquids that were found on Titan by the Huygens probe, which landed on Saturn’s largest moon on January 14.

“But these liquids are not shiny, so you have to figure out how to deposit a shiny metal like aluminum directly onto the surface of the liquid,” Angel said. “Normally when we make an astronomical telescope we make the mirrors out of glass, which doesn?t reflect very much and then you evaporate aluminum or silver onto the glass. On the moon we would have to evaporate the metal onto the liquid rather than the glass.”

That’s one of the key areas of research under the NIAC award. In initial studies, Angel’s team has been able to evaporate a metal onto a liquid, although not yet at the cold temperatures required. However, they are encouraged by the results so far.

Angel’s team is atypical for a NIAC project, in that it’s an international collaboration, and NIAC doesn’t fund international partners. “It happens that the world experts on making spinning liquid mirror telescopes are all in Canada, so it was kind of essential that if we’re thinking of doing that on the moon that we bring them in,” Angel said. “Luckily, they have come in on their own ticket, so to speak, and are excited by the project.”

The Canadian members of the team are Emanno Borra, from Laval University in Quebec, who has been researching and building LMTs since the early 1980’s, and Paul Hickson, from University of British Columbia, who, with Borra’s help, built the 6 meter LMT in Vancouver. Other collaborators include Ki Ma at the University of Texas at Houston who is an expert on the cryogenic bearings, Warren Davison from the University of Arizona who is a mechanical engineering expert in telescopes, and graduate student Suresh Sivanandam.

NIAC was created in 1998 to solicit revolutionary concepts from people and organizations outside the space agency that could advance NASA’s missions. The winning concepts are chosen because they “push the limits of known science and technology,” and “show relevance to the NASA mission,” according to NASA. These concepts are expected to take at least a decade to develop.

Angel says that receiving the NIAC award is a great opportunity. “We will undoubtedly write a proposal for Phase II (of the NIAC funding),” he said. “We’ve identified during Phase I what are some of the most critical issues in this project, and what practical steps we should take now. We’ve opened some questions, and there are some simple tests we can do to see if there are any show stoppers or not.”

The biggest hurdle in making the Lunar Infrared Observatory a reality is, most likely, completely out of Angel’s hands. “The moon is a very interesting place to do science,” Angel said. “However, it’s predicated on a substantial commitment of resources by NASA to return to the moon.” Certainly, to build the large 20 or 100 meter telescopes there would have to be a manned presence on the moon. “So,” Angel continued, “by hitching your science in that direction, you become the tail of a very big dog over which you have absolutely no control”?

Angel hopes that NASA and the United States can maintain the momentum of the Vision for Space Exploration and return to the moon. “I think ultimately that moving out into space is something that humans have an urge to do and will do sometime,” Angel said. “When that happens, having interesting things to do once we get there is important. We have to know why we left the surface of this planet to go to the moon. We’re exploring, yes, but we can explore not only the moon, but use that as a place to do scientific research beyond the moon. I think it’s something that in the big picture should happen.”

Nancy Atkinson is a freelance writer and NASA Solar System Ambassador. She lives in Illinois.

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Magnetic Bubble Could Protect Astronauts on Long Trips

A graphic of a superconducting magnetic bubble that could protect spacecraft. Credit: MIT.
A graphic of a superconducting magnetic bubble that could protect spacecraft. Credit: MIT.

It’s the year 2027 and NASA’s Vision for Space Exploration is progressing right on schedule. The first interplanetary spacecraft with humans aboard is on course for Mars. However, halfway into the trip, a gigantic solar flare erupts, spewing lethal radiation directly at the spacecraft. But, not to worry. Because of research done by former astronaut Jeffrey Hoffman and a group of MIT colleagues back in the year 2004, this vehicle has a state-of-the-art superconducting magnetic shielding system that protects the human occupants from any deadly solar emissions.

New research has recently begun to examine the use of superconducting magnet technology to protect astronauts from radiation during long-duration spaceflights, such as the interplanetary flights to Mars that are proposed in NASA’s current Vision for Space Exploration.

The principal investigator for this concept is former astronaut Dr. Jeffrey Hoffman, who is now a professor at the Massachusetts Institute of Technology (MIT).

Hoffman’s concept is one of 12 proposals that began receiving funding last month from the NASA Institute for Advanced Concepts (NIAC). Each gets $75,000 for six-months of research to make initial studies and identify challenges in developing it. Projects that make it through that phase are eligible for as much as $400,000 more over two years.

The concept of magnetic shielding is not new. As Hoffman says, “the Earth has been doing it for billions of years!”

Earth’s magnetic field deflects cosmic rays, and an added measure of protection comes from our atmosphere which absorbs any cosmic radiation that makes its way through the magnetic field. Using magnetic shielding for spacecraft was first proposed in the late 1960’s and early 70’s, but was not actively pursued when plans for long-duration spaceflight fell by the wayside.

However, the technology for creating superconducting magnets that can generate strong fields to shield spacecraft from cosmic radiation has only recently been developed. Superconducting magnet systems are desirable because they can create intense magnetic fields with little or no electrical power input, and with proper temperatures they can maintain a stable magnetic field for long periods of time.

One challenge, however, is developing a system that can create a magnetic field large enough to protect a bus-sized, habitable spacecraft. Another challenge is keeping the system at temperatures near absolute zero (0 Kelvin, -273 C, -460 F), which gives the materials superconductive properties. Recent advances in superconducting technology and materials have provided superconductive properties at higher than 120 K (-153 C, -243 F).

There are two types of radiation that need to be addressed for long-duration human spaceflight, says William S. Higgins, an engineering physicist who works on radiation safety at Fermilab, the particle accelerator near Chicago, IL. The first are solar flare protons, which would come in bursts following a solar flare event. The second are galactic cosmic rays, which, although not as lethal as solar flares, they would be a continuous background radiation to which the crew would be exposed. In an unshielded spacecraft, both types of radiation would result in significant health problems, or death, to the crew.

The easiest way to avoid radiation is to absorb it, like wearing a lead apron when you get an X-ray at the dentist. The problem is that this type of shielding can often be very heavy, and mass is at a premium with our current space vehicles since they need to be launched from the Earth’s surface. Also, according to Hoffman, if you use just a little bit of shielding, you can actually make it worse, because the cosmic rays interact with the shielding and can create secondary charged particles, increasing the overall radiation dose.

Hoffman foresees using a hybrid system that employs both a magnetic field and passive absorption. “That’s the way the Earth does it,” Hoffman explained, “and there’s no reason we shouldn’t be able to do that in space.”

One of the most important conclusions to the second phase of this research will be to determine if using superconducting magnet technology is mass effective.

“I have no doubt that if we build it big enough and strong enough, it will provide protection,” Hoffman said. “But if the mass of this conducting magnet system is greater than the mass just to use passive (absorbing) shielding, then why go to all that trouble?”

But that’s the challenge, and the reason for this study. “This is research,” Hoffman said. “I’m not partisan one way or the other; I just want to find out what’s the best way.”

Assuming Hoffman and his team can demonstrate that superconducting magnetic shielding is mass effective, the next step would be doing the actual engineering of creating a large enough (albeit lightweight) system, in addition to the fine-tuning of maintaining magnets at ultra-cold superconducting temperatures in space. The final step would be to integrate such a system into a Mars-bound spacecraft. None of these tasks are trivial.

The examinations of maintaining the magnetic field strength and the near-absolute zero temperatures of this system in space is already occurring in an experiment that is scheduled to be launched to the International Space Station for a three-year stay. The Alpha Magnetic Spectrometer (AMS) will be attached to the outside of the station and search for different types of cosmic rays. It will employ a superconducting magnet to measure each particle’s momentum and the sign of its charge. Peter Fisher, a physics professor also from MIT works on the AMS experiment, and is cooperating with Hoffman on his research of superconducting magnets. A graduate student and a research scientist are also working with Hoffman.

NIAC was created in 1998 to solicit revolutionary concepts from people and organizations outside the space agency that could advance NASA’s missions. The winning concepts are chosen because they “push the limits of known science and technology,” and “show relevance to the NASA mission,” according to NASA. These concepts are expected to take at least a decade to develop.

Hoffman flew in space five times and became the first astronaut to log more than 1,000 hours on the space shuttle. On his fourth space flight, in 1993, Hoffman participated in the first Hubble Space Telescope servicing mission, an ambitious and historic mission that corrected the spherical aberration problem in the telescope’s primary mirror. Hoffman left the astronaut program in 1997 to become NASA’s European Representative at the US Embassy in Paris, and then joined MIT in 2001.

Hoffman knows that to make a space mission possible, there’s a lot of idea development and hard engineering which precedes it.

“When it comes to doing things in space, if you’re an astronaut, you go and do it with your own hands,” Hoffman said. “But you don’t fly in space forever, and I still would like to make a contribution.”

Does he see his current research as important as fixing the Hubble Space Telescope?

“Well, not in the immediate sense,” he said. “But on the other hand, if we ever are going to have a human presence throughout the solar system we need to be able to live and work in regions where the charged particle environment is pretty severe. If we can’t find a way to protect ourselves from that, it will be a very limiting factor for the future of human exploration.”