Sustainable electronics for nano-spacecraft in deep space missions

Moon, Dong‐Il; Park, Jun-Young; Han, Jin−Woo; Jeon, Gwang-Jae; Kim, Jee-Yeon; Moon, J. W.; Seol, Myeong‐Lok; Kim, Choong Ki; Lee, Hee Chul; Meyyappan, M.; Choi, Yang‐Kyu

doi:10.1109/iedm.2016.7838524

Cited by 25 publications

(13 citation statements)

References 7 publications

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“…The data can be fitted, as evident from the results presented in figure 4, to a surprising accuracy by the logpolynomial scaling function A, reflects the order of magnitude estimate (6). We note that we cannot resolve numerically whether A(v) really vanishes for > v cI I c , or if it drops to finite but exceedingly small values.…”

Section: Scaling Of the Effective Reflection Areamentioning

confidence: 82%

“…• The overall mass requirements for superconducting tapes depends on the exact specification, like the material and the thickness used for the metallic substrate. Taking here the specific mass -8.9 g cm 3 of copper as a reference, we find that a wire capable to support a current of 10 6 A would weight about ( ) 8.9 5 g cm -1 length, which implies that r = 0.18 kg I m -1 . Compare (21).…”

Section: Appendix a Materials For Superconducting Wiresmentioning

confidence: 92%

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Universal scaling relation for magnetic sails: momentum braking in the limit of dilute interstellar media

Gros

2017

J. Phys. Commun.

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The recent progress in laser propulsion research has advanced substantially the prospects to realize interstellar spaceflight within a few decades. Here we examine passive deceleration via momentum braking from ionized interstellar media. The very large area to mass relations needed as a consequence of the low interstellar densities, of the order of 0.1 particlescm 3 , or lower, are potentially realizable with magnetic sails generated by superconducting coils. Integrating the equations of motion for interstellar protons hitting a Biot Savart loop we evaluate the effective reflection area A(v) in terms of the velocity v of the craft. We find that the numerical data is fitted over two orders of magnitude by the scaling relationc , whereis the bare sail area, I the current and b = v c. The critical current I c is1.55 10 6 A. The resulting universal deceleration profile can be evaluated analytically and mission parameters optimized for a minimal craft mass. For the case of a sample high speed transit to Proxima Centauri we find that magnetic momentum braking would involve daunting mass requirements of the order of 10 3 tons. A low speed mission to the Trappist-1 system could be realized on the other side already with a 1.5 ton spacecraft, which would be furthermore compatible with the specifications of currently envisioned directed energy launch systems. The extended cruising times of the order of 10 4 years imply however that a mission to the Trappist-1 system would be viable only for mission concepts for which time constrains are not relevant.

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Section: Scaling Of the Effective Reflection Areamentioning

confidence: 82%

Section: Appendix a Materials For Superconducting Wiresmentioning

confidence: 92%

Universal scaling relation for magnetic sails: momentum braking in the limit of dilute interstellar media

Gros

2017

J. Phys. Commun.

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“…The technical challenges involved are daunting. An example is the development of self-healing electronics [61], that is of circuits that would be capable to withstand decades to millennia of cosmic bombardment [62]. It is hence important to assess and to classify the range of possible interstellar missions.…”

Section: Discussion and Outlookmentioning

confidence: 99%

Why planetary and exoplanetary protection differ: The case of long duration genesis missions to habitable but sterile M-dwarf oxygen planets

Gros

2019

Acta Astronautica

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Time is arguably the key limiting factor for interstellar exploration. At high speeds, flyby missions to nearby stars by laser propelled wafersats taking 50-100 years would be feasible. Directed energy launch systems could accelerate on the other side also crafts weighing several tons to cruising speeds of the order of 1000 km/s (c/300). At these speeds, superconducting magnetic sails would be able to decelerate the craft by transferring kinetic energy to the protons of the interstellar medium. A tantalizing perspective, which would allow interstellar probes to stop whenever time is not a limiting factor. Prime candidates are in this respect Genesis probes, that is missions aiming to offer terrestrial life new evolutionary pathways on potentially habitable but hitherto barren exoplanets.Genesis missions raise important ethical issues, in particular with regard to planetary protection. Here we argue that exoplanetary and planetary protection differ qualitatively as a result of the vastly different cruising times for payload delivering probes, which are of the order of millennia for interstellar probes, but only of years for solar system bodies. Furthermore we point out that our galaxy may harbor a large number of habitable exoplanets, M-dwarf planets, which could be sterile due to the presence of massive primordial oxygen atmospheres. We believe that the prospect terrestrial life has in our galaxy would shift on a fundamental level in case that the existence of this type of habitable but sterile oxygen planets will be corroborated by future research. It may also explain why our sun is not a M dwarf, the most common star type, but a medium-sized G-class star.

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“…We i) develop a strategy for measuring HCD anneal on the chip, ii) confirm the anneal on chip and that it can be described using Stesmans' model and iii) find the anneal to strongly depend on gate bias. The results are of interest for augmenting the HCD Si-H bond breakage model [18], [19], self-healing electronics [20] and age monitoring circuits [21].…”

Section: Introductionmentioning

confidence: 94%

The Influence of Gate Bias on the Anneal of Hot-Carrier Degradation

Vandemaele

Bury

Tyaginov

et al. 2020

2020 IEEE International Reliability Physics Symposium (IRPS)

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We observe that non-zero gate bias applied during a high temperature anneal following hot-carrier degradation (HCD) impacts degradation recovery in nFETs. The devices are arranged into custom-built arrays and fabricated in a commercial 40 nm bulk CMOS technology and the FET anneal is induced by on-chip poly-Si heaters. The anneal is modeled using Stesmans' passivation model for P b -defects in hydrogen gas (H 2 ). Negative gate bias improves the anneal, in line with studies on biased passivation of process-induced P b -defects.

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Sustainable electronics for nano-spacecraft in deep space missions

Cited by 25 publications

References 7 publications

Universal scaling relation for magnetic sails: momentum braking in the limit of dilute interstellar media

Universal scaling relation for magnetic sails: momentum braking in the limit of dilute interstellar media

Why planetary and exoplanetary protection differ: The case of long duration genesis missions to habitable but sterile M-dwarf oxygen planets

The Influence of Gate Bias on the Anneal of Hot-Carrier Degradation

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