TITAN's digital RFQ ion beam cooler and buncher, operation and performance

Brunner, T.; Smith, M.; Brodeur, M.; Ettenauer, S.; Gallant, A. T.; Simon, Vanessa V.; Chaudhuri, A.; Lapierre, A.; Mané, E.; Ringle, R.; Simon, M. C.; Vaz, J.; Delheij, P. P. J.; Good, M.; Pearson, M. R.; Dilling, J.

doi:10.1016/j.nima.2012.02.004

Cited by 96 publications

(67 citation statements)

References 40 publications

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“…an RFQ linear Paul trap [27,28] for buffer-gas cooling and bunching the low-energy ion beam, (ii) a 3.7 T, highprecision mass-measurement Penning-trap (MPET) [29], and (iii) an electron-beam ion trap (EBIT) which provides highly charged ions (HCIs) [30].…”

Section: Titanmentioning

confidence: 99%

In-Trap Spectroscopy of Charge-Bred Radioactive Ions

et al. 2014

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A novel in-trap decay spectroscopy facility has been developed and constructed for use with TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN). This apparatus consists of an open-access spectroscopy ion-trap, which is surrounded radially with up to seven low-energy planar Si(Li) detectors. The ion-trap environment allows for the detection of low-energy photons by providing backing-free storage of the radioactive ions, while guiding decay particles from the trap center via the strong (up to 6 T) magnetic field. Excellent ion confinement is also facilitated by the use of an intense electron beam which provides storage times of minutes or more without ion loss. These advantages, along with careful monitoring and control, provide a significant increase in sensitivity for the detection of X-rays from the electron-capture process. The design, development, and commissioning of this apparatus are presented and the future of the device and experimental technique are discussed.Keywords: in-trap decay spectroscopy, electron capture, beta-decay of highly-charged ions, X-ray detection, electron-beam ion trap, nuclear matrix elements, double beta decay

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Section: Titanmentioning

confidence: 99%

In-Trap Spectroscopy of Charge-Bred Radioactive Ions

et al. 2014

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“…At TITAN, the delivered beam was accumulated in a Radio-Frequency Quadrupole cooler and buncher (RFQ) [20], which is a preparation trap filled with He gas for cooling. The RFQ can deliver cold bunched beam to the other research stations at TITAN: the MR-TOF-MS, MPET or an Electron Beam Ion Trap charge breeder (EBIT) [21].…”

mentioning

confidence: 99%

Dawning of the N=32 Shell Closure Seen through Precision Mass Measurements of Neutron-Rich Titanium Isotopes

Leistenschneider¹,

Reiter²,

Andrés³

et al. 2018

Phys. Rev. Lett.

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100

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A precision mass investigation of the neutron-rich titanium isotopes 51−55 Ti was performed at TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN). The range of the measurements covers the N = 32 shell closure and the overall uncertainties of the 52−55 Ti mass values were significantly reduced. Our results conclusively establish the existence of weak shell effect at N = 32, narrowing down the abrupt onset of this shell closure. Our data were compared with state-of-the-art ab initio shell model calculations which, despite very successfully describing where the N = 32 shell gap is strong, overpredict its strength and extent in titanium and heavier isotones. These measurements also represent the first scientific results of TITAN using the newly commissioned Multiple-Reflection Time-of-Flight Mass Spectrometer (MR-TOF-MS), substantiated by independent measurements from TITAN's Penning trap mass spectrometer.Atomic nuclei are highly complex quantum objects made of protons and neutrons. Despite the arduous efforts needed to disentangle specific effects from their many-body nature, the fine understanding of their structures provides key information to our knowledge of fundamental nuclear forces. One notable quantum behavior of bound nuclear matter is the formation of shell-like structures for each fermion group [1], as electrons do in atoms. Unlike for atomic shells, however, nuclear shells are known to vanish or move altogether as the number of protons or neutrons in the system changes [2]. Particular attention has been given to the emergence of strong shell effects among nuclides with 32 neutrons, pictured in a shell model framework as a full valence ν2p 3/2 orbital. Across most of the known nuclear chart, this orbital is energetically close to ν1f 5/2 , which prevents the appearance of shell signatures in energy observables. However, the excitation energies of the lowest 2 + states show a relative, but systematic, local increase below proton number Z = 24 [3]. This effect, characteristic of shell closures, has been attributed in shell model calculations to the weakening of attractive proton-neutron interactions between the ν1f 5/2 and π1f 7/2 orbitals as the latter empties, making the neutrons in the former orbital less bound [4,5]. Ab initio calculations are also extending their reach over this sector of the nuclear chart, yet no systematic investigation of the N = 32 isotones has been produced so far.

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“…The TITAN facility consists of four primary components: (i) A Radio-Frequency Quadrupole (RFQ) linear Paul trap [27,28], (ii) a Multi-Reflection Time-of-Flight (MR-ToF) isobar separator [29], iii) an Electron-Beam Ion Trap (EBIT) for generating Highly Charged Ions (HCIs) [30,31] and performing decay spectroscopy [32,33], and (iv) a 3.7 T, high-precision mass Measurement PEnning Trap (MPET) [34]. Following the delivery of the continuous A = 22 ISAC beam to TITAN, ions were injected into the RFQ where they were cooled using a He buffer gas.…”

mentioning

confidence: 99%

High-precision QEC -value measurement of the superallowed β+ emitter Mg22 and an ab

Reiter
¹
,

Leach
²
,

Drozdowski
³

et al. 2017

Phys. Rev. C
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5
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0

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TITAN's digital RFQ ion beam cooler and buncher, operation and performance

Cited by 96 publications

References 40 publications

In-Trap Spectroscopy of Charge-Bred Radioactive Ions

In-Trap Spectroscopy of Charge-Bred Radioactive Ions

Dawning of the N=32 Shell Closure Seen through Precision Mass Measurements of Neutron-Rich Titanium Isotopes

High-precision QEC -value measurement of the superallowed β+ emitter Mg22 and an ab

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