Generation of neutral atomic beams utilizing photodetachment by high power diode laser stacks

O'Connor, Aodh; Grussie, Florian; Bruhns, H.; Ruette, N. de; Koenning, Tobias; Miller, Kenneth A.; Savin, D. W.; Stützel, Julia; Urbain, Xavier; Kreckel, H.

doi:10.1063/1.4934873

Cited by 16 publications

(8 citation statements)

References 42 publications

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“…Installation of additional experimental equipment at the CSR is already foreseen. A high-power diode-laser interaction region, similar to that realized in recent work 28 , is in preparation for producing a fast beam of neutral atoms merging with the stored ions along a straight section of the CSR (see Sec. II).…”

Section: Discussionmentioning

confidence: 99%

The cryogenic storage ring CSR

Hahn

Becker

Berg

et al. 2016

Review of Scientific Instruments

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An electrostatic cryogenic storage ring, CSR, for beams of anions and cations with up to 300 keV kinetic energy per unit charge has been designed, constructed, and put into operation. With a circumference of 35 m, the ion-beam vacuum chambers and all beam optics are in a cryostat and cooled by a closed-cycle liquid helium system. At temperatures as low as (5.5 ± 1) K inside the ring, storage time constants of several minutes up to almost an hour were observed for atomic and molecular, anion and cation beams at an energy of 60 keV. The ion-beam intensity, energy-dependent closed-orbit shifts (dispersion), and the focusing properties of the machine were studied by a system of capacitive pickups. The Schottky-noise spectrum of the stored ions revealed a broadening of the momentum distribution on a time scale of 1000 s. Photodetachment of stored anions was used in the beam lifetime measurements. The detachment rate by anion collisions with residual-gas molecules was found to be extremely low. A residual-gas density below 140 cm(-3) is derived, equivalent to a room-temperature pressure below 10(-14) mbar. Fast atomic, molecular, and cluster ion beams stored for long periods of time in a cryogenic environment will allow experiments on collision- and radiation-induced fragmentation processes of ions in known internal quantum states with merged and crossed photon and particle beams.

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Section: Discussionmentioning

confidence: 99%

The cryogenic storage ring CSR

Hahn

Becker

Berg

et al. 2016

Review of Scientific Instruments

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“…The neutral beam is generated by a laser-induced electron detachment of a negative ion beam [7]. Two different ion sources, the duoplasmatron and the cesium sputter ion sources, were installed on the beamline at Rikkyo University for the off-line testing (Fig.…”

Section: Negative Ion Sourcementioning

confidence: 99%

Status of the Laser Spectroscopy and Merged-beam Experiments at RICE

Nakano

Igosawa

Iida

et al. 2021

Proceedings of 10th International Conference on Nuclear Physics at Storage Rings (STORI’17)

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“…We have previously used this technique to produce beams of neutral atomic H and D for studies of associative detachment (Bruhns et al 2010a(Bruhns et al , 2010bMiller et al 2011Miller et al , 2012. Additional details can be found in O'Connor et al (2015a).…”

Section: Neutral Beammentioning

confidence: 99%

One-colour (∼220 nm) resonance-enhanced (S₁ − S₀) multi-photon dissociation of acetylene: probe of the C₂ A¹ Π_u − X¹ Σ⁺_g band by frequency-modulation spectroscopy

Jiang

Liévin

et al. 2020

Molecular Physics

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Deuterated molecules are important chemical tracers of prestellar and protostellar cores. Up to now, the titular reaction has been assumed to contribute to the generation of these deuterated molecules. We have measured the merged-beams rate coefficient for this reaction as a function of the relative collision energy in the range of about 10 meV-10 eV. By varying the internal temperature of the reacting + H 3 molecules, we found indications for the existence of a reaction barrier. We have performed detailed theoretical calculations for the zero-point-corrected energy profile of the reaction and determined a new value for the barrier height of ≈68 meV. Furthermore, we have calculated the tunneling probability through the barrier. Our experimental and theoretical results show that the reaction is essentially closed at astrochemically relevant temperatures. We derive a thermal rate coefficient of <1×10 −12 cm 3 s −1 for temperatures below 75 K with tunneling effects included and below 155 K without tunneling.

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Generation of neutral atomic beams utilizing photodetachment by high power diode laser stacks

Cited by 16 publications

References 42 publications

The cryogenic storage ring CSR

The cryogenic storage ring CSR

Status of the Laser Spectroscopy and Merged-beam Experiments at RICE

One-colour (∼220 nm) resonance-enhanced (S₁ − S₀) multi-photon dissociation of acetylene: probe of the C₂ A¹ Π_u − X¹ Σ⁺_g band by frequency-modulation spectroscopy

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Generation of neutral atomic beams utilizing photodetachment by high power diode laser stacks

Cited by 16 publications

References 42 publications

The cryogenic storage ring CSR

The cryogenic storage ring CSR

Status of the Laser Spectroscopy and Merged-beam Experiments at RICE

One-colour (∼220 nm) resonance-enhanced (S1 − S0) multi-photon dissociation of acetylene: probe of the C2 A1 Πu − X1 Σ+g band by frequency-modulation spectroscopy

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One-colour (∼220 nm) resonance-enhanced (S₁ − S₀) multi-photon dissociation of acetylene: probe of the C₂ A¹ Π_u − X¹ Σ⁺_g band by frequency-modulation spectroscopy