Publications (16)
Optimized Cranial Bandeau Remodeling
James Drake, Marina Drygala, Ricardo Fukasawa +9
Craniosynostosis, a condition affecting 1 in 2000 infants, is caused by premature fusing of cranial vault sutures, and manifests itself in abnormal skull growth patterns. Left untr…
The Focusing Optics X-ray Solar Imager (FOXSI)
Steven Christe, Meriem Alaoui, Joel Allred +26
FOXSI is a direct-imaging, hard X-ray (HXR) telescope optimized for solar flare observations. It detects hot plasma and energetic electrons in and near energy release sites in the…
Slow Shock Formation Upstream of Reconnecting Current Sheets
Harry Arnold, James Drake, Marc Swisdak +3
The formation, development and impact of slow shocks in the upstream region of reconnecting current layers are explored. Slow shocks have been documented in the upstream region of…
Fundamentals of impulsive energy release in the corona
Albert Y. Shih, Lindsay Glesener, Säm Krucker +30
It is essential that there be coordinated and co-optimized observations in X-rays, gamma-rays, and EUV during the peak of solar cycle 26 (~2036) to significantly advance our unders…
Electromagnets Under the Table: an Unobtrusive Magnetic Navigation System for Microsurgery
Adam Schonewille, Changyan He, Cameron Forbrigger +4
Miniature magnetic tools have the potential to enable minimally invasive surgical techniques to be applied to space-restricted surgical procedures in areas such as neurosurgery. Ho…
A Predicted Small and Round Heliosphere
Merav Opher, Abraham Loeb, James Drake +1
The shape of the solar wind bubble within the interstellar medium, the so-called heliosphere, has been explored over six decades. As the Sun moves through the surrounding partially…
Earth's Alfvén wings driven by the April 2023 Coronal Mass Ejection
Li-Jen Chen, Daniel Gershman, Brandon Burkholder +33
We report a rare regime of Earth's magnetosphere interaction with sub-Alfvénic solar wind in which the windsock-like magnetosphere transforms into one with Alfvén wings. In the m…
On the origin of switchbacks observed in the solar wind
Forrest S. Mozer, Stuart Bale, John Bonnell +3
The origin of switchbacks in the solar wind is discussed in two classes of theory that differ in the location of the source being either in the transition region near the Sun or in…
Anatomical Mesh-Based Virtual Fixtures for Surgical Robots
Zhaoshuo Li, Alex Gordon, Thomas Looi +3
This paper presents a dynamic constraint formulation to provide protective virtual fixtures of 3D anatomical structures from polygon mesh representations. The proposed approach can…
Large-Scale Parallel Electric Fields and Return Currents in a Global Simulation Model
Harry Arnold, James Drake, Marc Swisdak +1
A new computational model, kglobal, is being developed to explore energetic electron production via magnetic reconnection in macroscale systems. The model is based on the discovery…
Characterizing Ion Flows Across a Dipolarization Jet
Harry Arnold, Marc Swisdak, James Drake
The structure of dipolarization jets with finite width in the dawn-dusk direction relevant to magnetic reconnection in the Earth's magnetotail is explored with particle-in-cell sim…
Thermodynamics of Shear Equilibration During Magnetic Reconnection Onset in Mixed-Equilibrium Current Sheets
Dominic Payne, Marc Swisdak, James Drake +1
Magnetic shear across the polarity inversion line (PIL) plays an important role in the explosive nature of reconnection onset and in the equilibration of current sheets, acting as…
Particle acceleration in solar flares with imaging-spectroscopy in soft X-rays
Mitsuo Oka, Amir Caspi, Bin Chen +15
Particles are accelerated to very high, non-thermal energies during explosive energy-release phenomena in space, solar, and astrophysical plasma environments. In the case of solar…
The need for focused, hard X-ray investigations of the Sun
Lindsay Glesener, Albert Y. Shih, Amir Caspi +46
Understanding the nature of energetic particles in the solar atmosphere is one of the most important outstanding problems in heliophysics. Flare-accelerated particles compose a hug…
Exploring impulsive solar magnetic energy release and particle acceleration with focused hard X-ray imaging spectroscopy
Steven Christe, Samuel Krucker, Lindsay Glesener +37
How impulsive magnetic energy release leads to solar eruptions and how those eruptions are energized and evolve are vital unsolved problems in Heliophysics. The standard model for…
Electron Acceleration during Macroscale Magnetic Reconnection
Harry Arnold, James Drake, Marc Swisdak +8
The first self-consistent simulations of electron acceleration during magnetic reconnection in a macroscale system are presented. Consistent with solar flare observations the spect…