86. Chris Ball, Research Scientist in the ElectroScience Laboratory

Show Notes:

After graduation, Chris Ball spent his summer working in Cambridge before returning to Columbus, Ohio, where he began graduate school in physics at The Ohio State University. He worked with Professor Frank DeLuca, a world-renowned researcher in microwave spectroscopy. Chris’ research focused on the microwave absorption of sulfur dioxide and its relationship to NASA's Microwave Limb Sounder instrument.

Studying Interstellar Bands

During his time at OSU, Chris collaborated with Professor Patrick Thaddeus from the Harvard Smithsonian Center for Astrophysics, who was looking to hire for a postdoc position. Chris moved back to Cambridge and worked in a lab in Somerville. He continued to do spectroscopy, but this time focused on long chains of carbon that don't occur naturally on Earth. These chains are unstable and are routinely observed in radio telescopes and optical telescopes. Chris and Thaddeus attempted to study the diffuse interstellar bands, which were optical features observed in telescope measurements that had never been explained over many years. They used laser spectroscopy to measure these bands and try to determine if any exotic carbon chains were responsible for them. Unfortunately, none of the exotic carbon chains were found, but the experience was rewarding.

The Intersection of Science and Engineering

After their first child was born, Chris and his family decided to move back to Columbus, Ohio, where he was offered a position at Battelle where his career began to focus on the intersection of science and engineering, specifically on developing sensor technologies and communications technologies. He worked on defense and security applications, such as detecting chemical and biological weapons, explosives, and narcotics. He also worked on pollution monitoring systems and handheld sensor technologies. Around  2015, Chris became disenchanted with Batel's strategic direction and started looking for alternatives. He found a similar job at Ohio State University's ElectroScience Laboratory, which focused on radar and communication systems. He left Batel, which coincided with his marriage falling apart. He moved offices, moved to an apartment, and started a consulting business.

Working on the CubeSat Satellite at NASA

Chris continued to focus on sensor and communication systems development. He was involved in a NASA program that built a CubeSat satellite, which was launched in 2018 from Wallops Island, Virginia, on a resupply mission to the International Space Station. The satellite went into orbit in July 2018. Chris discusses his exciting work in space, including developing sensors to detect toxic gasses and developing handheld infrared sensors for food and agricultural products. He is also working on an x-ray communication system, which uses X-rays as a carrier for wireless communications in space. In parallel with his work, he has a consulting company and has also discovered the joy of improv comedy, which he has been practicing for several months and now is part of an improv group called The Bunsen Burnouts.

Interstellar Clouds and Molecules

The discussion turns to interstellar clouds, and Chris explains what they are. There are many fundamental studies about the dynamics of molecules inside interstellar clouds and how they exist and might turn into stars in some regions. He also touches on the rotation of molecules, which is a fundamental discovery of quantum mechanics, and explains that, the transitions between rotational states in molecules are typically in the infrared part of the spectrum, while electronic transitions occur in the visible and ultraviolet part. However, molecules can also have bound atoms rotating, with quantized angular momentum and transitions corresponding to microwave frequencies.

X ray Communications Research

Chris talks about one of the projects he is proud of, X rays and the concept of wireless communications, which involve modulating a carrier frequency to transmit information. He explains that the idea of using X rays as a carrier and modulating them in some way came from discussions with NASA. NASA had a problem communicating with spacecraft during blackout periods when they enter the Earth's atmosphere. They developed a small X ray source that can be switched on and off quickly, allowing for about a gigahertz of bandwidth. This is better than current spaceborne optical systems, which can only transmit about a gigabyte of information per second. The team licensed this technology from NASA and applied its principles to X rays. X rays have significantly smaller wavelengths than optical systems, so they can propagate them much farther than optical systems. This could be advantageous for high data rate systems that can talk to Mars, as it would allow for interplanetary communication. Chris goes on to explain their process of research, feasibility of concepts, and demonstrating applicability. 

Detecting Drugs and Toxic Chemicals 

Chris has developed detectors for detecting drugs and toxic chemicals at extremely low concentrations and explains how these work. These detectors use microwave spectroscopy principles to measure gasses like formaldehyde in a low-pressure environment. The spectroscopic lines, which are sharp Gaussian distributions, are used to distinguish different gasses from each other and uniquely identify them. They achieve high sensitivity by making the lines taller and larger, and can be used in multipass configurations where the microwave beam passes through multiple times. This allows you to discriminate different gasses from each other and uniquely identify them like a fingerprint.

Chris talks about a collaboration with his PhD advisor at Ohio State that led to the development of a mission adaptable chemical sensor funded by the Department of Defense. This sensor sucked in air and measured hundreds of different chemicals apart in a relatively short time. However, the technology is expensive due to the millimeter wave frequencies used in the microwave part of the system. The best available technologies cost around $60,000 for a transmitter and $50,000 for a receiver. This means that a $100,000 instrument is needed to buy the transmitter and receiver, along with all the electronics and pumps.

Influential Harvard Professors and Courses

Chris discusses their experiences at Harvard, focusing on the core curriculum courses and expository writing as the most valuable course he took. His advisor encouraged him to write a NASA fellowship proposal, which was well-written due to their expository writing skills. This experience has made him more valuable in various jobs, including red team reviews and proposal reviews for NASA and other funding agencies. 

He also shares their experiences with math 22 and physics courses, and he mentions working at the high energy physics lab during their junior year and senior year, which was a valuable experience as they helped build a prototype muon detector system and perform measurements.

Chris took advantage of opportunities to get involved with research while at Harvard, working at the high energy physics lab during the summer before his junior year and after his senior year. This experience allowed him to learn a lot about the science of expository writing and how to write effectively in academic settings.

Timestamps:

 

01:03 Career path after Harvard graduation with a focus on physics research

06:04 Career progression from postdoc to industry to academia

10:39 Career changes, space research, and improv comedy

18:58 Interstellar clouds and molecular rotation

22:57 Wireless communication technologies and innovations

27:02 Using X-rays for high-speed communication in space

33:39 Developing infrared detectors for space applications with a focus on sensitivity and accuracy

39:16 Chemical sensing technology and its applications

45:36 Writing tips and research experiences at Harvard

 

Links:

ElectroScience Laboratory: https://electroscience.osu.edu/

Page at OSU: https://electroscience.osu.edu/people/ball.51

Email address: [email protected]