Hypersonic nozzle for laser-spectroscopy studies at 17 K characterized by resonance-ionization-spectroscopy-based flow mapping

Ferrer, R.; Verlinde, M.; Verstraelen, E.; Claessens, Arno; Huyse, M.; Kraemer, Sandro; Kudryavtsev, Yu.; Romans, Jekabs; Bergh, P. Van den; Duppen, P. Van; Zadvornaya, A.; Chazot, Olivier; Grossir, Guillaume; Kalikmanov, V. I.; Nabuurs, M.; Reynaerts, Dominiek

doi:10.1103/physrevresearch.3.043041

Cited by 16 publications

(17 citation statements)

References 26 publications

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“…The deviation of the temperatures obtained with M = 5 and M = 8 from the value at M = 6.5 is around 3% and was considered when determining the uncertainty of the experimentally determined Mach number. A typical value of T 0 obtained from the fitting of the data is 380 K, indicating some heating of the gas from the hot filament, a fact that was already observed in previous investigations in Leuven [16].…”

Section: Characterization Of the Gas-jetsupporting

confidence: 74%

“…The second nozzle is optimized for high stagnation pressures around P 0 = 300 mbar, and here, the diverging part has a length of about 3 cm. This nozzle is identical to the nozzles investigated recently at KU Leuven [16]. The third nozzle, referred to as the mid-range nozzle, has a conic contour.…”

Section: Experimental Procedures 21 a Technical Overview Of Jetrismentioning

confidence: 74%

“…It was verified whether analyzing the jet as a whole has an impact on the values relative to the pixel-by-pixel analysis, and both methods are in agreement with one another. The optimal stagnation pressure of 300 mbar for the high-stagnation-pressure nozzle could not be reached, again limited by the pumping system [16]. Under the available conditions, the low-stagnation-pressure and mid-range nozzle outperformed the high-stagnation-pressure nozzle with regards to the obtained resolution.…”

Section: Resolutionmentioning

confidence: 98%

“…Therefore, a thorough characterization is essential in understanding the performance of the setup. At KU Leuven, such nozzles are studied in detail using Laser Induced Fluorescence (LIF) in Cu I using pulsed laser radiation as well as the RIS of neutral Cu atoms [16,17].…”

Section: Experimental Procedures 21 a Technical Overview Of Jetrismentioning

confidence: 99%

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Resolution Characterizations of JetRIS in Mainz Using 164Dy

Münzberg

Block

Claessens

et al. 2022

Atoms

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Laser spectroscopic studies of elements in the heavy actinide and transactinide region help understand the nuclear ground state properties of these heavy systems. Pioneering experiments at GSI, Darmstadt identified the first atomic transitions in the element nobelium. For the purpose of determining nuclear properties in nobelium isotopes with higher precision, a new apparatus for high-resolution laser spectroscopy in a gas-jet called JetRIS is under development. To determine the spectral resolution and the homogeneity of the gas-jet, the laser-induced fluorescence of 164Dy atoms seeded in the jet was studied. Different hypersonic nozzles were investigated for their performance in spectral resolution and efficiency. Under optimal conditions, a spectral linewidth of about 200–250 MHz full width at half maximum and a Mach number of about 7 was achieved, which was evaluated in context of the density profile of the atoms in the gas-jet.

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Section: Characterization Of the Gas-jetsupporting

confidence: 74%

Section: Experimental Procedures 21 a Technical Overview Of Jetrismentioning

confidence: 74%

Section: Resolutionmentioning

confidence: 98%

Section: Experimental Procedures 21 a Technical Overview Of Jetrismentioning

confidence: 99%

See 2 more Smart Citations

Resolution Characterizations of JetRIS in Mainz Using 164Dy

Münzberg

Block

Claessens

et al. 2022

Atoms

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“…The gas cell has three laser windows, two just before the exit, facing each other, and one opposite and concentric to the exit hole. At the gas cell exit, a de Laval nozzle is installed, the geometry of which is optimized using the calculations performed by the Von Karman Institute for Fluid Dynamics (VKI, Belgium) [18]. On the exit side of the gas cell, aligned with the nozzle, two extraction plates-one on ground potential and the other on a slightly positive potential-provide an initial guiding field for the ions towards the RFQ chain.…”

Section: Gas Cell Rfq Ion Guides and Mass Spectrometermentioning

confidence: 99%

First Offline Results from the S3 Low-Energy Branch

Romans

Ajayakumar

Authier

et al. 2022

Atoms

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We present the first results obtained from the S3 Low-Energy Branch , the gas cell setup at SPIRAL2-GANIL, which will be installed behind the S3 spectrometer for atomic and nuclear spectroscopy studies of exotic nuclei. The installation is currently being commissioned offline, with the aim to establish optimum conditions for the operation of the radio frequency quadrupole ion guides, mass separation and ion bunching, providing high-efficiency and low-energy spatial spread for the isotopes of interest. Transmission and mass-resolving power measurements are presented for the different components of the S3-LEB setup. In addition, a single-longitudinal-mode, injection-locked, pumped pulsed-titanium–sapphire laser system has been recently implemented and is used for the first proof-of-principle measurements in an offline laser laboratory. Laser spectroscopy measurements of erbium, which is the commissioning case of the S3 spectrometer, are presented using the 4f126s23H6→4f12(3H)6s6p optical transition.

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Nuclear Charge Radii

Nörtershäuser¹,

Moore²

2022

Handbook of Nuclear Physics

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Hypersonic nozzle for laser-spectroscopy studies at 17 K characterized by resonance-ionization-spectroscopy-based flow mapping

Cited by 16 publications

References 26 publications

Resolution Characterizations of JetRIS in Mainz Using 164Dy

Resolution Characterizations of JetRIS in Mainz Using 164Dy

First Offline Results from the S3 Low-Energy Branch

Nuclear Charge Radii

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