A supersonic laser ablation beam source with narrow velocity spreads

被引：13

作者：

Aggarwal, P. ^{[1
,2
]}

Bethlem, H. L. ^{[1
,3
,4
]}

Boeschoten, A. ^{[1
,2
]}

Borschevsky, A. ^{[1
,2
]}

Esajas, K. ^{[1
,2
]}

Hao, Y. ^{[1
,2
]}

Hoekstra, S. ^{[1
,2
]}

Jungmann, K. ^{[1
,2
]}

Marshall, V. R. ^{[1
,2
]}

Meijknecht, T. B. ^{[1
,2
]}

Mooij, M. C. ^{[2
,3
,4
]}

Timmermans, R. G. E. ^{[1
,2
]}

Touwen, A. ^{[1
,2
]}

Ubachs, W. ^{[3
,4
]}

Willmann, L. ^{[1
,2
]}

Yin, Y. ^{[1
,2
]}

Zapara, A. ^{[1
,2
]}

机构：

[1] Univ Groningen, Van Swinderen Inst Particle Phys & Grav, Zernikelaan 25, NL-9747 AA Groningen, Netherlands

[2] Natl Inst Subat Phys, Nikhef, Sci Pk 105, NL-1098 XG Amsterdam, Netherlands

[3] Vrije Univ Amsterdam, Dept Phys & Astron, De Boelelaan 1081, NL-1081 HV Amsterdam, Netherlands

[4] Vrije Univ Amsterdam, LaserLaB, De Boelelaan 1081, NL-1081 HV Amsterdam, Netherlands

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2021年 / 92卷 / 03期

关键词：

Molecular beams - Molecules - Laser cooling - Strontium compounds - Argon lasers - Laser ablation - Barium compounds;

D O I：

10.1063/5.0035568

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A supersonic beam source for SrF and BaF molecules is constructed by combining the expansion of carrier gas (a mixture of 2% SF6 and 98% argon) from an Even-Lavie valve with laser ablation of a barium/strontium metal target at a repetition rate of 10 Hz. Molecular beams with a narrow translational velocity spread are produced at relative values of Delta v/v = 0.053(11) and 0.054(9) for SrF and BaF, respectively. The relative velocity spread of the beams produced in our source is lower in comparison with the results from other metal fluoride beams produced in supersonic laser ablation sources. The rotational temperature of BaF is measured to be 3.5 K. The source produces 6 x 10(8) and 10(7) molecules per steradian per pulse in the X-2 Sigma (+) (nu = 0, N = 1) state of BaF and SrF molecules, respectively, a state amenable to Stark deceleration and laser cooling.

引用

页数：7

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