Laser optical pumping of high-density Rb in polarized He3 targets

Mark E. Wagshul, T. E. Chupp

Research output: Contribution to journalArticle

75 Citations (Scopus)

Abstract

We have investigated high-density Rb optical pumping in polarized He3 targets and present measurements of collisional relaxation rates and studies of diffusion-driven wall relaxation of the Rb polarization. We show that a boundary layer resides in the vicinity of the cell walls within which a polarization gradient is established by diffusion. Absorption of the incident laser radiation within this layer leads to a striking decrease in optical-pumping efficiency for resonant light but has little effect for off-resonant light. Our theory introduces polarization-dependent slowing of optical pumping rates due to the Rb nuclear spin. We have observed a strong frequency dependence of the optical-pumping efficiency, consistent with our theoretical predictions. We report the following rate constants for collisional relaxation of Rb polarization: due to Rb (kRb-Rb=8×10-13 cm3/s), due to N2 (kN2-Rb=8×10-18 cm3/s), and due to He3, an upper limit of (k3He-Rb≤2×10-18 cm3/s). The data and model presented are used to predict laser power and intensity requirements for high-density polarized He3 targets.

Original languageEnglish (US)
Pages (from-to)3854-3869
Number of pages16
JournalPhysical Review A
Volume49
Issue number5
DOIs
StatePublished - 1994
Externally publishedYes

Fingerprint

optical pumping
polarization
lasers
nuclear spin
boundary layers
laser beams
gradients
requirements
predictions

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Atomic and Molecular Physics, and Optics

Cite this

Laser optical pumping of high-density Rb in polarized He3 targets. / Wagshul, Mark E.; Chupp, T. E.

In: Physical Review A, Vol. 49, No. 5, 1994, p. 3854-3869.

Research output: Contribution to journalArticle

@article{31fc8091a3e841b79b03554be4f12758,
title = "Laser optical pumping of high-density Rb in polarized He3 targets",
abstract = "We have investigated high-density Rb optical pumping in polarized He3 targets and present measurements of collisional relaxation rates and studies of diffusion-driven wall relaxation of the Rb polarization. We show that a boundary layer resides in the vicinity of the cell walls within which a polarization gradient is established by diffusion. Absorption of the incident laser radiation within this layer leads to a striking decrease in optical-pumping efficiency for resonant light but has little effect for off-resonant light. Our theory introduces polarization-dependent slowing of optical pumping rates due to the Rb nuclear spin. We have observed a strong frequency dependence of the optical-pumping efficiency, consistent with our theoretical predictions. We report the following rate constants for collisional relaxation of Rb polarization: due to Rb (kRb-Rb=8×10-13 cm3/s), due to N2 (kN2-Rb=8×10-18 cm3/s), and due to He3, an upper limit of (k3He-Rb≤2×10-18 cm3/s). The data and model presented are used to predict laser power and intensity requirements for high-density polarized He3 targets.",
author = "Wagshul, {Mark E.} and Chupp, {T. E.}",
year = "1994",
doi = "10.1103/PhysRevA.49.3854",
language = "English (US)",
volume = "49",
pages = "3854--3869",
journal = "Physical Review A",
issn = "2469-9926",
publisher = "American Physical Society",
number = "5",

}

TY - JOUR

T1 - Laser optical pumping of high-density Rb in polarized He3 targets

AU - Wagshul, Mark E.

AU - Chupp, T. E.

PY - 1994

Y1 - 1994

N2 - We have investigated high-density Rb optical pumping in polarized He3 targets and present measurements of collisional relaxation rates and studies of diffusion-driven wall relaxation of the Rb polarization. We show that a boundary layer resides in the vicinity of the cell walls within which a polarization gradient is established by diffusion. Absorption of the incident laser radiation within this layer leads to a striking decrease in optical-pumping efficiency for resonant light but has little effect for off-resonant light. Our theory introduces polarization-dependent slowing of optical pumping rates due to the Rb nuclear spin. We have observed a strong frequency dependence of the optical-pumping efficiency, consistent with our theoretical predictions. We report the following rate constants for collisional relaxation of Rb polarization: due to Rb (kRb-Rb=8×10-13 cm3/s), due to N2 (kN2-Rb=8×10-18 cm3/s), and due to He3, an upper limit of (k3He-Rb≤2×10-18 cm3/s). The data and model presented are used to predict laser power and intensity requirements for high-density polarized He3 targets.

AB - We have investigated high-density Rb optical pumping in polarized He3 targets and present measurements of collisional relaxation rates and studies of diffusion-driven wall relaxation of the Rb polarization. We show that a boundary layer resides in the vicinity of the cell walls within which a polarization gradient is established by diffusion. Absorption of the incident laser radiation within this layer leads to a striking decrease in optical-pumping efficiency for resonant light but has little effect for off-resonant light. Our theory introduces polarization-dependent slowing of optical pumping rates due to the Rb nuclear spin. We have observed a strong frequency dependence of the optical-pumping efficiency, consistent with our theoretical predictions. We report the following rate constants for collisional relaxation of Rb polarization: due to Rb (kRb-Rb=8×10-13 cm3/s), due to N2 (kN2-Rb=8×10-18 cm3/s), and due to He3, an upper limit of (k3He-Rb≤2×10-18 cm3/s). The data and model presented are used to predict laser power and intensity requirements for high-density polarized He3 targets.

UR - http://www.scopus.com/inward/record.url?scp=0001240031&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0001240031&partnerID=8YFLogxK

U2 - 10.1103/PhysRevA.49.3854

DO - 10.1103/PhysRevA.49.3854

M3 - Article

VL - 49

SP - 3854

EP - 3869

JO - Physical Review A

JF - Physical Review A

SN - 2469-9926

IS - 5

ER -