Dielectric barrier discharge source for supersonic beams

Luria, Kfir; Lavie, N.; Even, U.

doi:10.1063/1.3244085

Cited by 58 publications

(44 citation statements)

References 33 publications

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“…A fraction of the atoms will be excited to neutral, metastable excited states (usually triplet states) that have long radiative lifetimes [41]. However, here we present results that were obtained by creating metastable atoms using a soft discharge mechanism inside the nozzle itself [37,40]. This is a more efficient mechanism that creates large numbers of excited metastable atoms in the beam.…”

Section: Beam Properties Generated By the Even-lavie Valvementioning

confidence: 81%

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Pulsed Supersonic Beams from High Pressure Source: Simulation Results and Experimental Measurements

Even

2014

Advances in Chemistry

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Pulsed beams, originating from a high pressure, fast acting valve equipped with a shaped nozzle, can now be generated at high repetition rates and with moderate vacuum pumping speeds. The high intensity beams are discussed, together with the skimmer requirements that must be met in order to propagate the skimmed beams in a high-vacuum environment without significant disruption of the beam or substantial increases in beam temperature.

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Section: Beam Properties Generated By the Even-lavie Valvementioning

confidence: 81%

“…Here a neon beam, excited by an electric discharge inside the conical nozzle [37], is photographed. The emerging excited neon atoms emit in the red, showing that the expansion diverges at an angle of approximately 10 ∘ (FWHM).…”

Section: Nozzle Design and Testingmentioning

confidence: 99%

Pulsed Supersonic Beams from High Pressure Source: Simulation Results and Experimental Measurements

Even

2014

Advances in Chemistry

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“…Both the conventional pinhole-discharge and the DBD sources show excellent beam properties in comparison to previous sources. We note that other advanced radical sources, e.g., DBDs coupled with Even-Lavie valves, 23 may give a comparable performance. However, no direct comparison has been made yet.…”

Section: Discussionmentioning

confidence: 88%

“…26 The DBD source is modeled after the design introduced by Even et al, 23 adapted to the NPV. Details of our DBD valve are shown in Figure 2.…”

Section: A Discharge Sourcesmentioning

confidence: 99%

Cold and intense OH radical beam sources

Ploenes¹,

Haas

Zhang

et al. 2016

Review of Scientific Instruments

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We present the design and performance of two supersonic radical beam sources: a conventional pinhole-discharge source and a dielectric barrier discharge (DBD) source, both based on the Nijmegen pulsed valve. Both designs have been characterized by discharging water molecules seeded in the rare gases Ar, Kr, or Xe. The resulting OH radicals have been detected by laser-induced fluorescence. The measured OH densities are (3.0 ± 0.6) × 10 11 cm -3 and (1.0 ± 0.5) × 10 11 cm -3 for the pinholedischarge and DBD sources, respectively. The beam profiles for both radical sources show a relative longitudinal velocity spread of about 10%. The absolute rotational ground state population of the OH beam generated from the pinhole-discharge source has been determined to be more than 98%. The DBD source even produces a rotationally colder OH beam with a population of the ground state exceeding 99%. For the DBD source, addition of O 2 molecules to the gas mixture increases the OH beam density by a factor of about 2.5, improves the DBD valve stability, and allows to tune the mean velocity of the radical beam. Published by AIP Publishing. [http://dx

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“…In most cases the excitation process warms the supersonic jet, or contaminates it with sputtered electrode material [47][48][49][50][51][52]. We have developed a new type of electrode less Dielectric Barrier Discharge [53][54][55][56] source that does not heat the jet or contaminates it [57]. The source is attached to the front flange of the Even-Lavie valve and uses a built in disk magnet to confine the discharge electrons.…”

Section: Ionic Clusters and Radical Sourcesmentioning

confidence: 99%