Investigation of Laser-Surface Interactions Using a Nano-Impulse Balance

D’Souza, Brian; Ketsdever, Andrew D.

doi:10.2514/6.2004-2664

Cited by 3 publications

(6 citation statements)

References 9 publications

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“…Figure 6 shows a typical trace of a digital microthruster firing. Using techniques describe by D'Souza and Ketsdever [5], it is possible to back out the impulse from the maximum deflection of the stand. The mass change can be determined by the difference between the steady-state deflection of the stand before and after the firing (when the TSMB returns to equilibrium).…”

Section: Results and Discusionsmentioning

confidence: 99%

“…The first mode was the transient mode. From this data and calibration, the impulse of the thruster was determined as described by D'Souza and Ketsdever [5]. The second mode was the steadystate mode.…”

Section: Methodsmentioning

confidence: 99%

“…The TSMB has been designed based on the nNTS [4] and NIBS [5] systems, which resolve thrust measurements from a torsion pendulum that pivots around a vertical axis of rotation. A force imparted to the stand results in a horizontal displacement of the target, which can be precisely measured using a Linear Variable Differential Transducer (LVDT).…”

Section: Thrust Stand Micro-mass Balancementioning

confidence: 99%

See 2 more Smart Citations

Development of a Thrust Stand Micro-Balance to Assess Micropropulsion Performance

Pancotti¹,

Lilly²,

Ketsdever³

et al. 2005

41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference &Amp;amp; Exhibit

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As proposed spacecraft and their associated thrusters have become smaller, technology has been developed to meet the demand for performance measurements for the extremely low force levels produced. For such thrusters, it is also desirable to measure the mass changes resulting from the utilization of propellant associated with either the steady state thrust or transient impulses. A thrust stand and novel data analysis method is presented to make both thrust (or impulse) and mass change measurements concurrently. It is shown that very accurate and repeatable measurements of mass can be made using an existing thrust stand system. Furthermore, it is shown that impulse and mass measurements can be resolved at the same time from a single thrust stand trace.

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Section: Results and Discusionsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Thrust Stand Micro-mass Balancementioning

confidence: 99%

See 1 more Smart Citation

Development of a Thrust Stand Micro-Balance to Assess Micropropulsion Performance

Pancotti¹,

Lilly²,

Ketsdever³

et al. 2005

41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference &Amp;amp; Exhibit

Self Cite

View full text Add to dashboard Cite

show abstract

“…The reproducibility of the results for a variety of arbitrary impulses has been demonstrated elsewhere by D'Souza and Ketsdever. [2]…”

Section: Experimental Set Upmentioning

confidence: 99%

“…To this end, a torsional impulse balance has been developed as a new diagnostic tool to study fundamental processes in laser-surface interactions. [2] The impulse balance has been designed and tested with a robust calibration system to measure impulsive forces with resolution as low as 1 nano-Newton-second (nNs). A simple technique has been developed to accurately determine the force as a function of time from the motion of the nano-impulse balance system (NIBS).…”

Section: Introductionmentioning

confidence: 99%

Investigation of Transient Forces Produced by Gases Expelled from Rapidly Heated Surfaces

D’Souza¹,

Ketsdever²,

Muntz³

2005

AIP Conference Proceedings

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A torsional impulse balance has been developed as a new diagnostic tool to study fundamental processes in laser-surface interactions. The impulse balance has been designed and tested with a robust calibration system to measure impulsive forces with resolution as low as 1 nano-Newton-second. A simple technique has been developed to accurately determine the force as a function of time from the motion of the nano-impulse balance system (NIBS). This technique will be useful in examining the transient responses of photon-surface interactions. Initial ablation measurements using anodized aluminum plates at vacuum and with various background gases are presented.

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Optimal Photon Energy Transfer on Titanium Targets for Laser Thrusters

Marcu¹,

Stafe²,

Mihail-Gabriel³

et al. 2021

Preprint

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Using two infrared pulsed lasers systems: a picosecond solid-state Nd:YAG laser with tunable repetition rate (400 kHz - 1MHz) working in a burst mode of multi-pulse train and a femtosecond Ti:Sapphire laser amplifier with tunable pulse duration inthe range of tens of femtoseconds up to tens of picoseconds, working in single-shot mode (TEWALASS facility from CETAL-NILPRP), we have investigated the optimal laser parameters for kinetic energy transfer to a titanium target for laser-thrustapplications. In the single-pulse regime, we controlled the power density by changing both duration and pulse energy. Inthe multi-pulse regime, the train’s number of pulses (burst length), and the pulse energy variation were investigated. Heatpropagation and photon reflection-based models were used to simulate obtained experimental results. In the single-pulseregime, optimal kinetic energy transfer was obtained for power densities of about 500 times the ablation threshold correspondingto the specific laser pulse duration. In multi-pulse regimes, the optimal number of pulses per train increases with the trainfrequency and decreases with the pulse power density. An ideal energy transfer efficiency resulting from our experiments andsimulations is close to around 0.02%.

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Investigation of Laser-Surface Interactions Using a Nano-Impulse Balance

Cited by 3 publications

References 9 publications

Development of a Thrust Stand Micro-Balance to Assess Micropropulsion Performance

Development of a Thrust Stand Micro-Balance to Assess Micropropulsion Performance

Investigation of Transient Forces Produced by Gases Expelled from Rapidly Heated Surfaces

Optimal Photon Energy Transfer on Titanium Targets for Laser Thrusters

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