Trap-loss collisions of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow /><mml:mrow><mml:mn>85</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mi mathvariant="normal">Rb</mml:mi></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow /><mml:mrow><mml:mn>87</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mi mathvariant="normal">Rb</mml:mi><mml:mo>:</mml:mo></mml:math>Dependence on trap parameters

Gensemer, S. D.; Sánchez-Villicaña, V.; Tan, K. Y. N.; Grove, Timothy; Gould, Phillip L.

doi:10.1103/physreva.56.4055

Cited by 48 publications

(56 citation statements)

References 41 publications

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“…(6) to the 87 Rb decay curve yields α = 1.69 s −1 . As the 87 Rb two-body decay, β Rb , is below the noise level, a value of β Rb = 2 × 10 −12 cm 3 /s was taken from the literature [11]. The high value of α is due to the large background produced from the source that copropagates with the He * beam.…”

Section: Resultsmentioning

confidence: 99%

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Trap loss in a metastable helium-rubidium magneto-optical trap

2010

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We present results of the study of a simultaneously confined metastable helium (He * ) and rubidium magnetooptical trap (MOT). By monitoring the trap decay of the 87 Rb MOT with and without a He * MOT present, we find the light-assisted, two-body loss rate to be β Rb-He * = (6 ± 2) × 10 −10 cm 3 /s. Moreover, we find that it is possible to create a large, robust 87 Rb-He * MOT, opening the possibility of creating a 87 Rb-He * Bose-Einstein condensate. This would be the first dual-species condensate incorporating an alkali metal ground-state atom and an excited-state noble gas atom.

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Section: Resultsmentioning

confidence: 99%

“…The He * light-assisted, two-body loss has previously been measured as 1.9 ± 0.8 × 10 −9 cm 3 /s [10]. This is approximately three orders of magnitude greater than the light-assisted, two-body loss rate for 87 Rb of 3.7 ± 1.7 × 10 −12 cm 3 /s [11].…”

Section: Introductionmentioning

confidence: 93%

Trap loss in a metastable helium-rubidium magneto-optical trap

2010

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“…Both two-dimensional and three-dimensional MOTs are used extensively for the production of laser cooled ensembles of atoms. Since their invention, these devices have been studied in detail [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. The use of MOTs has enabled the careful investigation into the mechanisms of laser cooling and trapping [1][2][3][4][5]10,18], intratrap cold collisions and loss from a MOT [1,9,11,14,15,17,19], and the determination of collisional cross sections and scattering from atoms in a MOT [6,7,[20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Magneto-optical trap loading rate dependence on trap depth and vapor density

et al. 2012

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We study the dependence of the particle loading rate of a rubidium vapor cell magneto-optic trap (MOT). Using a trap depth determination of the MOT that relies on measurements of loss rates during optical excitation of colliding atoms to a repulsive molecular state, we experimentally determine the MOT escape velocity and show that the loading rate scales with escape velocity to the fourth power, or, equivalently, with the square of the trap depth. We also demonstrate that the loading rate is directly proportional to the background rubidium density. We thus experimentally confirm the loading rate model used in the literature since the invention of the MOT. In addition to confirming this long-standing conjecture, we show that the loading rate dependence can be used to reliably infer the trap depth and to tune the relative depth of a MOT (i.e., capture and escape velocities) when the background density is held fixed. The measurements have allowed an experimental determination of the relationship between capture and escape velocities in our MOTs of v c 1.290.12v e .

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“…In both cases, excess energy is converted to kinetic energy of the atom pair, and can lead to trap loss. These collisions have been extensively studied in one-and two-color experiments where the applied laser light is nearly resonant between a single pair of principal quantum states (e.g., the ground S state and the first excited P state in alkali metal atoms) [3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Enhanced light-assisted-collision rate via excitation to the long-lived5S1/2-5D5/2
Wilson
¹
,
Roberts
²

2011
Phys. Rev. A
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0
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We report measurements of a significant increase in the two-body loss rate in an 85 Rb magneto-optic trap (MOT) caused by the addition of light resonant with the 5P 3/2 -to-5D 5/2 transition (776 nm) in Rb. Exposure to the additional light resulted in up to a factor of 5 decrease in the steady-state number of atoms in the MOT. This loss is attributed to more than an order of magnitude increase in the light-assisted collision rate brought about by the 776-nm light. By measuring the intensity dependence of the loss rate, the loss channel was identified to be the relatively long-lived 5S 1/2 -5D 5/2 molecular potential.

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Trap-loss collisions of85Rband87Rb:Dependence on trap parameters

Cited by 48 publications

References 41 publications

Trap loss in a metastable helium-rubidium magneto-optical trap

Trap loss in a metastable helium-rubidium magneto-optical trap

Magneto-optical trap loading rate dependence on trap depth and vapor density

Enhanced light-assisted-collision rate via excitation to the long-lived5S1/2-5D5/2
Wilson
¹
,
Roberts
²

2011
Phys. Rev. A
0
0
0
0
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Trap-loss collisions of85Rband87Rb:Dependence on trap parameters

Cited by 48 publications

References 41 publications

Trap loss in a metastable helium-rubidium magneto-optical trap

Trap loss in a metastable helium-rubidium magneto-optical trap

Magneto-optical trap loading rate dependence on trap depth and vapor density

Enhanced light-assisted-collision rate via excitation to the long-lived5S1/2-5D5/2Wilson1, Roberts2 2011Phys. Rev. A0000View full textAdd to dashboardCite

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Enhanced light-assisted-collision rate via excitation to the long-lived5S1/2-5D5/2
Wilson
¹
,
Roberts
²

2011
Phys. Rev. A
0
0
0
0
View full text Add to dashboard Cite