Zobrazeno 1 - 10
of 406
pro vyhledávání: '"Smith, W. W."'
Autor:
Kwolek, J. M., Goodman, D. S., Slayton, B., umel, R. Bl\", Wells, J. E., Narducci, F. A., Smith, W. W.
Publikováno v:
Phys. Rev. A 99, 052703 (2019)
We present measurements of the charge-exchange reaction rate between neutral sodium (Na) and ionized calcium (\ce{Ca+}) in a hybrid atom-ion trap, which is comprised of a Na magneto-optical trap concentric with a linear Paul trap. Once the Na and \ce
Externí odkaz:
http://arxiv.org/abs/1812.02810
Publikováno v:
Phys. Rev. A 97, 053420 (2018)
We present model-independent measurements of the excited-state population of atoms in a sodium (Na) magneto-optical trap (MOT) using a hybrid ion-neutral trap composed of a MOT and a linear Paul trap (LPT). We photoionize excited Na atoms trapped in
Externí odkaz:
http://arxiv.org/abs/1802.05306
Publikováno v:
Phys. Rev. A 95, 053416 (2017)
We present experimental measurements of the steady-state ion number in a linear Paul trap (LPT) as a function of the ion-loading rate. These measurements, taken with (a) constant Paul trap stability parameter $q$, (b) constant radio-frequency (rf) am
Externí odkaz:
http://arxiv.org/abs/1701.04115
Publikováno v:
Review of Scientific Instruments 87, 055102 (2016)
Simultaneous laser locking of IR and UV lasers to a visible stabilized reference laser is demonstrated via a Fabry-Perot cavity. LabVIEW is used to analyze the input and an internal PID algorithm converts the Fabry-Perot signal to an analog locking f
Externí odkaz:
http://arxiv.org/abs/1510.07272
Publikováno v:
Phys. Rev. A 92, 063402 (2015)
We predict that the steady-state ion number $N_s$ for radio-frequency (rf) traps, loaded at a rate of $\lambda$ particles per unit time, shows universal non-monotonic behavior as a function of loading rate $\lambda$. The shape of $N_s(\lambda)$, char
Externí odkaz:
http://arxiv.org/abs/1507.04731
Publikováno v:
Phys. Rev. A 91, 012709 (2015)
We present measurements of the total elastic and resonant charge-exchange ion-atom collision rate coefficient $k_\mathrm{ia}$ of cold sodium (\ce{Na}) with optically-dark low energy \ce{Na+} ions in a hybrid ion-neutral trap. To determine $k_\mathrm{
Externí odkaz:
http://arxiv.org/abs/1412.5141
Publikováno v:
Rev. Sci. Instrum. 84, 113101 (2013)
Linear Paul r.f. ion traps (LPT) are used in many experimental studies such as mass spectrometry, atom-ion collisions and ion-molecule reactions. Mass selective resonant quenching (MSRQ) is implemented in LPT either to identify a charged particle's m
Externí odkaz:
http://arxiv.org/abs/1311.3970
Publikováno v:
Physical Review A 86, 063419 (2012)
A hybrid ion-neutral trap provides an ideal system to study collisional dynamics between ions and neutrals. This system provides a general cooling method that can be applied to optically inaccessible species and can also potentially cool internal deg
Externí odkaz:
http://arxiv.org/abs/1209.2106
Long range polarization forces between ions and neutral atoms result in large elastic scattering cross sections, e.g., 10^6 a.u. for Na+ on Na or Ca+ on Na at cold and ultracold temperatures. This suggests that a hybrid ion-neutral trap should offer
Externí odkaz:
http://arxiv.org/abs/1207.1810
New experiments were proposed recently to investigate the regime of cold atomic and molecular ion-atom collision processes in a special hybrid neutral-atom--ion trap under high vacuum conditions. The collisional cooling of laser pre-cooled Ca$^+$ ion
Externí odkaz:
http://arxiv.org/abs/physics/0209077