{"id":9486,"date":"2025-01-04T11:39:51","date_gmt":"2025-01-04T16:39:51","guid":{"rendered":"https:\/\/spaceandplanetarynewswire.com\/?p=9486"},"modified":"2025-01-04T11:39:51","modified_gmt":"2025-01-04T16:39:51","slug":"new-uva-professors-research-may-boost-next-generation-space-rockets","status":"publish","type":"post","link":"https:\/\/spaceandplanetarynewswire.com\/?p=9486","title":{"rendered":"New UVA Professor\u2019s Research May Boost Next-Generation Space Rockets"},"content":{"rendered":"
Pictured is a 6 kW Hall thruster in operation at the NASA Jet Propulsion Laboratory. (Courtesy of NASA-JPL\/CalTech)<\/figcaption><\/figure>\n

Go faster, farther, more efficiently. <\/p>\n

That\u2019s the goal driving spacecraft propulsion engineers like Chen Cui<\/a>, a new assistant professor at the University of Virginia School of Engineering and Applied Science. Cui is exploring ways to improve electric propulsion thrusters \u2014 a key technology for future space missions.<\/p>\n

\u201cIn order to ensure the technology remains viable for long-term missions, we need to optimize EP integration with spacecraft systems,\u201d Cui said.<\/p>\n

Chen Cui is a new assistant professor in the Department of Mechanical and Aerospace Engineering.<\/figcaption><\/figure>\n

Working with his former adviser, University of Southern California professor Joseph Wang, Cui published findings last month in Plasma Sources Science and Technology<\/a><\/em> that provide fresh insights into electron kinetic behavior within plasma beams, perhaps revealing the \u201cshape\u201d of things to come. <\/p>\n

The Future of Space Exploration<\/strong><\/p>\n

Cui, who joined the Department of Mechanical and Aerospace Engineering<\/a> in the fall, focuses his research on understanding how electrons \u2014 tiny, fast-moving charged particles \u2014 behave in the plasma beams emitted by EP thrusters. <\/p>\n

\u201cThese particles may be small, but their movement and energy play an important role in determining the macroscopic dynamics of the plume emitted from the electric propulsion thruster,\u201d he said. <\/p>\n

By studying these microscopic interactions, Cui aims to better understand how the plume of plasma emitted interacts with the spacecraft itself.<\/p>\n

Electric propulsion works by ionizing a neutral gas, usually xenon, and then using electric fields to accelerate the resulting ions. The ions, now forming a high-speed plasma beam, push the spacecraft forward. <\/p>\n

Compared to chemical rockets, EP systems are much more fuel-efficient, enabling spacecraft to travel farther while carrying less fuel. These systems are often powered by solar panels or small nuclear reactors, making them ideal for long missions in space, such as NASA’s Artemis program, which aims to return humans to the moon, and eventually send astronauts to Mars and beyond.<\/p>\n

However, the plume emitted by the thrusters isn\u2019t just exhaust \u2014 it\u2019s the lifeline of the entire propulsion system. If not well understood, the plume can cause unexpected problems. Some particles may flow backward toward the spacecraft, potentially damaging important components on the craft, such as solar panels or communication antennas.<\/p>\n

A solar-powered EP spacecraft design. (Courtesy of NASA)<\/figcaption><\/figure>\n

\u201cFor missions that could last years, EP thrusters must operate smoothly and consistently over long periods of time,\u201d Cui said. This means scientists and engineers must have a deep understanding of how the plasma plume behaves in order to prevent any potential damage.<\/p>\n

What the Research Found<\/strong><\/p>\n

Cui specializes in building advanced computer simulations to study how plasma behaves in EP thruster plasma flows. These aren\u2019t just any simulations. They\u2019re powered by modern supercomputers and use a method called Vlasov simulation, an advanced \u201cnoise-free\u201d computational method.<\/p>\n

The electrons in an EP beam don\u2019t behave exactly as predicted by simple models. They perform differently at different temperatures and speeds, creating distinct patterns. <\/p>\n

Being able to precisely see the complexity of electron interactions, while factoring out data that confuse the bigger picture, is key. <\/p>\n

\u201cThe electrons are a lot like marbles packed into a tube,\u201d Cui said. \u201cInside the beam, the electrons are hot and move fast. Their temperature doesn\u2019t change much if you go along the beam direction. However, if the \u2018marbles\u2019 roll out from the middle of the tube, they start to cool down. This cooling happens more in certain direction, the direction perpendicular the beam\u2019s direction.\u201d<\/p>\n

In their most recent paper, they found the electron velocity distribution shows a near-Maxwellian [bell-curve-like] shape in the beam direction and what they describe as a \u201ctop-hat\u201d profile in the transverse direction of the beam.<\/p>\n

Additionally, Cui and Wang discovered that electron heat flux <\/strong>\u2014 the major way thermal energy moves through the EP plasma beam \u2014 primarily occurs along the beam\u2019s direction, with unique dynamics that had not been fully captured in previous models.<\/p>\n","protected":false},"excerpt":{"rendered":"

Go faster, farther, more efficiently.  That\u2019s the goal driving spacecraft propulsion engineers like Chen Cui, a new assistant professor at the University of Virginia School of Engineering and Applied Science. Cui is exploring ways to improve electric propulsion thrusters \u2014 a key technology for future space missions. \u201cIn order to ensure the technology remains viable for…<\/p>\n","protected":false},"author":71,"featured_media":9487,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"fifu_image_url":"https:\/\/engineering.virginia.edu\/sites\/default\/files\/styles\/classic_xlrg\/public\/2025-01\/Xenon_hall_thruster.webp?itok=hBY6Yq5E","fifu_image_alt":"","footnotes":""},"categories":[207],"tags":[],"class_list":["post-9486","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-research"],"_links":{"self":[{"href":"https:\/\/spaceandplanetarynewswire.com\/index.php?rest_route=\/wp\/v2\/posts\/9486","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spaceandplanetarynewswire.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/spaceandplanetarynewswire.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/spaceandplanetarynewswire.com\/index.php?rest_route=\/wp\/v2\/users\/71"}],"replies":[{"embeddable":true,"href":"https:\/\/spaceandplanetarynewswire.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=9486"}],"version-history":[{"count":1,"href":"https:\/\/spaceandplanetarynewswire.com\/index.php?rest_route=\/wp\/v2\/posts\/9486\/revisions"}],"predecessor-version":[{"id":9488,"href":"https:\/\/spaceandplanetarynewswire.com\/index.php?rest_route=\/wp\/v2\/posts\/9486\/revisions\/9488"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/spaceandplanetarynewswire.com\/index.php?rest_route=\/wp\/v2\/media\/9487"}],"wp:attachment":[{"href":"https:\/\/spaceandplanetarynewswire.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9486"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/spaceandplanetarynewswire.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9486"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/spaceandplanetarynewswire.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9486"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}