The WITCH experiment: towards weak interactions studies. Status and prospects

Козлов, В.; Beck, M.; Coeck, S.; Herbane, M.; Kraev, I. S.; Severijns, N.; Wauters, F.; Delahaye, P.; Herlert, A.; Wenander, F.; Zákoucký, D.

doi:10.1007/s10751-007-9519-2

Cited by 7 publications

(2 citation statements)

References 15 publications

(14 reference statements)

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“…Precision β-decay experiments are well served by a cylindrical geometry due to the fact that the magnetic field employed to trap the ions radially may simultaneously be used to contain charged decay products [10] such as β's and protons with up to 4π acceptance in an appropriately designed trap. The strong magnetic radial confinement in combination with the weak electrostatic axial confinement direct the decay products of interest to either end of the trap for detection with negligible affect on the energy of the particles.…”

Section: Cylindrical Trapsmentioning

confidence: 99%

Design of a unique open-geometry cylindrical Penning trap

Mehlman

Shidling

Behling

et al. 2013

Nuclear Instruments and Methods in Physics Research Section A:

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The Texas A&M University Penning Trap facility is an upcoming ion trap that will be used to search for possible scalar currents in T = 2 superallowed β-delayed proton decays, which, if found, would be an indication of physics beyond the standard model. In addition, TAMUTRAP will provide a low-energy, point-like source of ions for various other applications at the Cyclotron Institute. The experiment is centered around a unique, compensated cylindrical Penning trap that employs a specially optimized length/radius ratio in the electrode structure that is not used by any other facility. This allows the geometry to exhibit an unprecedented 90 mm free radius, which is larger than in any existing trap, while at the same time remaining a tractable overall length. The trap geometry was designed from first principles to be suitable for a wide range of nuclear physics experiments. In particular, the electrode structure is both "tunable" and "orthogonalized", which allows for a near quadrupole electric field at the trap center, a feature necessary for performing precision mass measurements. β + 0 + , T = 2 γ p 0 + , T = 2

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Section: Cylindrical Trapsmentioning

confidence: 99%

Design of a unique open-geometry cylindrical Penning trap

Mehlman

Shidling

Behling

et al. 2013

Nuclear Instruments and Methods in Physics Research Section A:

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“…Most of these experiments observe coincidences between the β particle and the recoiling daughter nucleus. The Weak Interaction Trap for Charged Particles (WITCH) experiment [19][20][21][22][23] at ISOLDE/CERN applies a unique method; i.e., it uses a double Penning trap system to prepare the source for the experiment and a retardation spectrometer to measure the recoil-ion energy distribution as shown in Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

Firstβ−νcorrelation measurement from the recoil-energy spectrum of Penning trappedAr35ions

et al. 2014

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We demonstrate a novel method to search for physics beyond the standard model by determining the β-ν angular correlation from the recoil-ion energy distribution after β decay of ions stored in a Penning trap. This recoil-ion energy distribution is measured with a retardation spectrometer. The unique combination of the spectrometer with a Penning trap provides a number of advantages, e.g., a high recoil-ion count rate and low sensitivity to the initial position and velocity distribution of the ions and completely different sources of systematic errors compared to other state-of-the-art experiments. Results of a first measurement with the isotope 35 Ar are presented. Although currently at limited precision, we show that a statistical precision of about 0.5% is achievable with this unique method, thereby opening up the possibility of contributing to state-of-the-art searches for exotic currents in weak interactions.

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