High-Throughput Ionic Liquid Ion Sources Using Arrays of Microfabricated Electrospray Emitters With Integrated Extractor Grid and Carbon Nanotube Flow Control Structures

Hill, Frances A.; Heubel, Eric Vincent; Leon, Philip Ponce de; Velásquez–García, Luis Fernando

doi:10.1109/jmems.2014.2320509

Cited by 47 publications

(27 citation statements)

References 36 publications

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“…3 and Fig. 6 shows the decrement in time period of waveform from nanoseconds to picoseconds, which indicates the improvement in throughput of FIFO design [10,11].…”

Section: Resultsmentioning

confidence: 99%

GALS Technology to Improve Throughput of FIFO

Dour¹,

Kinkar²

2017

IJCA

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An efficient high throughput FIFO (First-In-First-Out) system using GALS (Globally Asynchronous Locally Synchronous) technology is designed for data transfer from one domain to another domain with the development of a modeling and simulation framework whoseresults are obtained as RTL(Register-Transfer Level) Schematic. Integration of several of IP (Intellectual Property) cores into a single chip in order to fulfill the demand of latest applications, leads to various timing issues especially interfacing between the different clock domains. The GALS technology provides a clock distribution feature for the same. A general purpose 8-bit synchronous core designfavoringthe GALS technology is used for the designing. The model is implemented in VHDL (Very High Speed Integrated Circuits Hardware Description Language) with Xilinx ISE (Integrated Synthesis Environment) Design Suite 14.5 Version software and simulated using ISim tool. The synthesis results show improved throughput andreduced chip area usingGALS.

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“…3 and Fig. 6 shows the decrement in time period of waveform from nanoseconds to picoseconds, which indicates the improvement in throughput of FIFO design [10,11].…”

Section: Resultsmentioning

confidence: 99%

GALS Technology to Improve Throughput of FIFO

Dour¹,

Kinkar²

2017

IJCA

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“…In the condition containing both monomers and dimers, it was assumed that cations contained 85% monomers and 15% dimers and that anions contained 72% monomers and 28% dimers. 9) It was assumed that ions corresponding to 1 µA are emitted from the emitter tip. 9) The number of ions emitted from the emitter tip per second � � is described as…”

Section: Configurationmentioning

confidence: 99%

Numerical Investigation of Steady and Transient Ion Beam Extraction Mechanisms for Electrospray Thrusters

Emoto

Tsuchiya

Takao

2018

AEROSPACE TECHNOLOGY JAPAN

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Electrospray thrusters are simple propulsion systems, which can be operated on nanosatellites, and it is possible to reduce components of high pressure gas systems using ionic liquid as a propellant. However, evaluations of electrospray thrusters are difficult in experiments since the size of emitter cones is on the order of micrometers. Then, the authors performed Particle-in-Cell simulations of ions in the electrospray thruster and investigated ion beam extraction mechanisms in steady and transient flows numerically. The simulation results show that steady ion beam distributions were rarely affected by ion species. On the other hand, it was clarified that a jet affected the ion beam profiles. In addition, the authors evaluated propulsion performance of the electrospray thruster, which showed a thrust of about 64 nN per emitter and a specific impulse of about 6400 s. In the transient flow, the ion beam behavior showed rapid responses when applied voltages with or without a slew rate are assumed.

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“…Based on experimental data from studies that employ EMI-BF4, the average mass-to-charge ratio at room temperature is found to be 1.5E-6 kg/C. 24 Assuming 2000 V as the applied potential, we calculate a theoretical thrust from Eq. (8) as 975 nN.…”

Section: B Design Parametersmentioning

confidence: 99%

Correction: Dielectric Materials with Deposited Electrode Layers for Electrospray Arrays

Kimber

Jorns

Sodano

2018

2018 Joint Propulsion Conference

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A two-dimensional electrostatic analysis is used to model the effects of geometric and material variations of the extractor of a single electrospray emitter. In particular, a geometry is modeled where the emitting capillary is embedded in a countersunk hole in a layer of Teflon and the extractor is comprised of a 20 nanometer thin-film of directly deposited gold on the dielectric. COMSOL software is used to solve Maxwell's equations to determine the effect of the dielectric walls and emitter geometry on the electric field in the vicinity of the emitter. It is found that the dielectric only marginally changes the magnitude of the field but not the shape, which suggests that conventional scaling laws for onset voltage, applied potential, and flow rate still apply. These scaling laws then are used to design and construct a prototype of this configuration, baselining the ionic liquid 1-ethyl-3-methylimidazolium tetrafluoroborate (EMI-BF4) as a propellant. The design process, results of numerical model verification, as well as the initial prototype fabrication are presented.

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High-Throughput Ionic Liquid Ion Sources Using Arrays of Microfabricated Electrospray Emitters With Integrated Extractor Grid and Carbon Nanotube Flow Control Structures

Cited by 47 publications

References 36 publications

GALS Technology to Improve Throughput of FIFO

GALS Technology to Improve Throughput of FIFO

Numerical Investigation of Steady and Transient Ion Beam Extraction Mechanisms for Electrospray Thrusters

Correction: Dielectric Materials with Deposited Electrode Layers for Electrospray Arrays

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