2015
DOI: 10.1088/1674-1056/24/11/113101
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Stark-potential evaporative cooling of polar molecules in a novel optical-access opened electrostatic trap

Abstract: We propose a novel optical-access opened electrostatic trap to study the Stark-potential evaporative cooling of polar molecules by using two charged disk electrodes with a central hole of radius r0 =1.5 mm, and derive a set of new analytical equations to calculate the spatial distributions of the electrostatic field in the above charged-disk layout. Afterwards, we calculate the electric-field distributions of our electrostatic trap and the Stark potential for cold ND3 molecules, and analyze the dependences of … Show more

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Cited by 3 publications
(5 citation statements)
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“…Compared with the disk electrostatic trap (DET) in Ref. [27], the ODET and TDET proposed here achieve a significant improvement in the trap loading efficiency. Using MgF as the target molecule, the dependences of the trap load-043701-6 ing efficiencies of DET, ODET, and TDET on the incident velocity of the slow beam under the single loading operation mode are calculated, respectively, as shown in Fig.…”
Section: Discussionmentioning
confidence: 97%
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“…Compared with the disk electrostatic trap (DET) in Ref. [27], the ODET and TDET proposed here achieve a significant improvement in the trap loading efficiency. Using MgF as the target molecule, the dependences of the trap load-043701-6 ing efficiencies of DET, ODET, and TDET on the incident velocity of the slow beam under the single loading operation mode are calculated, respectively, as shown in Fig.…”
Section: Discussionmentioning
confidence: 97%
“…Applying the same voltages on the electrodes of DET as those used in Ref. [27], i.e., voltages of 30 kV and 50 kV to the first and second disk electrodes in the loading configuration and voltages of 50 kV and 50 kV in the trapping configuration, a highest loading efficiency of 25.8% is obtained with an incident velocity of 6 m/s. Meanwhile, applying voltages of U = 26 kV to ODET (or TDET), a highest loading efficiency of 78.4% (or 81.6% ) is achieved with an incident velocity of 10 m/s (or 11 m/s), resulting in an increase by a factor of two in the number of the trapped molecules.…”
Section: Discussionmentioning
confidence: 99%
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“…The simulation of the evaporative cooling followed the model developed in the group of Ketterle. [29,30] When the trapping potential decreases from U(k B T ) to U (ηk B T ), the molecular number N, the trapping volume V , the molecular temperature T , and the molecular density n change to N , V , T , and n , respectively. The relations are as follows: [29,30]…”
Section: Evaporative Coolingmentioning
confidence: 99%
“…[6][7][8][9] Continuing efforts in search of new methods for the production of cold atoms and molecules have never ceased. [10][11][12][13][14][15][16][17] In 2007, Matthews et al [18] proposed that cold oxygen atoms could be made with zero mean velocity in the laboratory frame by photodissociating NO 2 molecules.…”
Section: Introductionmentioning
confidence: 99%