Jacob Roberts
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View article: Calibrated heating rate measurements using electric-field-induced electron extraction in ultracold neutral plasmas
Calibrated heating rate measurements using electric-field-induced electron extraction in ultracold neutral plasmas Open
The heating rate of plasma electrons induced by external fields or other processes can be used as an experimental tool to measure fundamental plasma properties such as electrical conductivity or electron–ion collision rates. We have develo…
View article: Nanosecond-timescale development of Faraday rotation in an ultracold gas
Nanosecond-timescale development of Faraday rotation in an ultracold gas Open
When a gas of ultracold atoms is suddenly illuminated by light that is nearly\nresonant with an atomic transition, the atoms cannot respond instantaneously.\nThis non-instantaneous response means the gas is initially more transparent to\nt…
View article: Many-body collision contributions to electron momentum damping rates in a plasma influenced by electron strong coupling
Many-body collision contributions to electron momentum damping rates in a plasma influenced by electron strong coupling Open
Experimental studies of electron-ion collision rates in an ultracold neutral plasma can be conducted through measuring the rate of electron plasma oscillation damping. For sufficiently cold and dense conditions where strong coupling influe…
View article: Exploring the crossover between high-energy-density plasma and ultracold neutral plasma physics
Exploring the crossover between high-energy-density plasma and ultracold neutral plasma physics Open
In this paper, we present ideas that were part of the miniconference on the crossover between High Energy Density Plasmas (HEDP) and Ultracold Neutral Plasmas (UNPs) at the 60th Annual Meeting of the American Physical Society Division of P…
View article: Spatially truncated optical pumping cooling
Spatially truncated optical pumping cooling Open
We present both the theoretical description and experimental implementation of a novel cooling technique for ultracold atoms trapped in a confining potential. We call the technique ‘spatially truncated optical pumping cooling.’ By using th…
View article: Observation of a strong-coupling effect on electron-ion collisions in ultracold plasmas
Observation of a strong-coupling effect on electron-ion collisions in ultracold plasmas Open
Ultracold plasmas (UCPs) provide a well-controlled system for studying multiple aspects in plasma physics that include collisions and strong-coupling effects. By applying a short electric field pulse to an UCP, a plasma electron center-of-…
View article: Evaluation of charged particle evaporation expressions in ultracold plasmas
Evaluation of charged particle evaporation expressions in ultracold plasmas Open
Electron evaporation plays an important role in the electron temperature evolution and thus the expansion rate of low-density ultracold plasmas. In addition, evaporation is useful as a potential tool for obtaining colder electron temperatu…