Accession Number : ADA611186


Title :   Electrosprayed Heavy Ion and Nanodrop Beams for Surface Engineering and Electrical Propulsion


Descriptive Note : Final rept. 30 Sep 2011-29 Jun 2014


Corporate Author : CALIFORNIA UNIV IRVINE DEPT OF MECHANICAL AND AEROSPACE ENGINEERING


Personal Author(s) : Gamero-Castano, Manuel


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a611186.pdf


Report Date : 10 Sep 2014


Pagination or Media Count : 174


Abstract : In this project we have investigated the generation, interaction and energetic impact of electrosprayed nanodroplets and molecular ions, covering continuously the projectile size range from 1 nm up to hundreds of nm. The 1-20 nm size range is of great interest to achieve variable specific impulse (Isp) from 100 s to 1000 s in drop-based electrical propulsion, while pure molecular ion emission enables higher Isp. The resulting knowledge is directly applicable to electrospray thrusters/electric propulsion), and will lead to new opportunities in other fields such as MEMS and IC fabrication. The specific research problems tackled during this projects and accomplishments include: the development of a basic electrospray beam model, and measurements of the spreading of the beam at varying temperature; the experimental characterization and typical thruster surfaces bombarded by electrosprayed nanodroplets, and a molecular dynamics study of the physics of nanodroplet impact; the extension of the minimum size of electrosprayed nanodroplets, and the exploration of energetic propellants for propulsion and sputtering; and molecular dynamics simulations of the fragmentation and emission of ions from ionic liquids.


Descriptors :   *ELECTRIC PROPULSION , DROPS , HYPERVELOCITY IMPACT , MOLECULAR DYNAMICS , MOLECULAR IONS , SPECIFIC IMPULSE , SPRAYS , THRUSTERS


Subject Categories : Electric and Ion Propulsion


Distribution Statement : APPROVED FOR PUBLIC RELEASE