Zobrazeno 1 - 10
of 164
pro vyhledávání: '"Richard E. Wirz"'
Publikováno v:
AIP Advances, Vol 10, Iss 9, Pp 099101-099101-4 (2020)
In this Comment, we analyze the performance of a microwave plasma device presented by Ye et al. [AIP Adv. 10, 055002 (2020)]. The efficiency analysis, using conservation of energy, shows that the methods used by the original authors predict up to 800
Externí odkaz:
https://doaj.org/article/3b080896eb2f4086a285d0f44a5d5d38
Autor:
Cesar E. Huerta, Richard E. Wirz
Publikováno v:
AIP Advances, Vol 9, Iss 12, Pp 125009-125009-6 (2019)
A Monte Carlo model is developed and validated to understand the ion-induced electron emission (IIEE) characteristics of complex surfaces and to show the importance of using precise geometric features to examine surface morphology effects on the yi
Externí odkaz:
https://doaj.org/article/25cc0d320d7a4c99932371150d93ce7e
Publikováno v:
Aerospace, Vol 7, Iss 11, p 153 (2020)
To better characterize the lifetime and performance of electrospray thrusters, electron emission due to electrode impingement by the propellant cation 1-ethyl-3-methylimidazolium (EMI+) has been evaluated with semi-empirical modeling techniques. Resu
Externí odkaz:
https://doaj.org/article/e61628fc34eb412793746ee8f02ebe45
Autor:
Nolan M. Uchizono, Adam L. Collins, Anirudh Thuppul, Peter L. Wright, Daniel Q. Eckhardt, John Ziemer, Richard E. Wirz
Publikováno v:
Aerospace, Vol 7, Iss 10, p 141 (2020)
Electrospray thruster life and mission performance are strongly influenced by grid impingement, the extent of which can be correlated with emission modes that occur at steady-state extraction voltages, and thruster command transients. Most notably, w
Externí odkaz:
https://doaj.org/article/c3ad98383d8c46f38dea71def120b1d8
Publikováno v:
Aerospace, Vol 7, Iss 8, p 108 (2020)
Ionic liquid electrospray thrusters are capable of producing microNewton precision thrust at a high thrust–power ratio but have yet to demonstrate lifetimes that are suitable for most missions. Accumulation of propellant on the extractor and accele
Externí odkaz:
https://doaj.org/article/4104ff9bc0024dc0abfc802eee7d2432
Autor:
Vernon H. Chaplin, Lee K. Johnson, Robert B. Lobbia, Mary F. Konopliv, Timothy Simka, Richard E. Wirz
Publikováno v:
Journal of Propulsion and Power. 38:866-879
Autor:
Zhitong Chen, Guojun Chen, Richard Obenchain, Rui Zhang, Fan Bai, Tianxu Fang, Hanwen Wang, Yingjie Lu, Richard E. Wirz, Zhen Gu
Publikováno v:
Materials Today. 54:153-188
Autor:
Peter Wright, Richard E Wirz
Porous ionic electrospray emitters have received significant interest for space propulsion due to their performance and operational simplicity. We have developed a diffusion equation for describing the transient flow response in a porous electrospray
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9ac36dbce2fedac6ff03fe96ffe0ce05
https://doi.org/10.21203/rs.3.rs-1865748/v1
https://doi.org/10.21203/rs.3.rs-1865748/v1
Publikováno v:
Journal of Electric Propulsion. 1(1)
Molecular dynamics (MD) simulations were performed for ion extraction from electrospray thrusters to investigate relevant extraction processes numerically. To approximate the electrospray jet tip, a simulation domain consisting of 4-5 nm-sized ionic
Autor:
Richard E. Wirz, Stephen A. Samples
Publikováno v:
Journal of Spacecraft and Rockets. 58:754-763
The increasing capabilities of the CubeSat platform have led to growing interest in performing more complex commercial and science missions with these miniature spacecraft. In particular, electric ...