A pulsed drift cavity to capture 30 keV ion bunches at ground potential

Coeck, S.; Delauré, B.; Herbane, M.; Beck, M.; Golovko, V. V.; Kopecky, S.; Козлов, В.; Kraev, I. S.; Lindroth, A.; Phalet, T.; Beck, D.; Delahaye, P.; Herlert, A.; Wenander, F.; Severijns, N.

doi:10.1016/j.nima.2006.11.054

Cited by 15 publications

(16 citation statements)

References 17 publications

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“…3. The VBL contains a pulsed drift tube (PDT), a 70 cm long electrode [28] which is initially biased to a potential of 21 kV. Upon entering the PDT region the ion bunch thus has a kinetic energy of 9 keV, at which point the PDT is switched within 2 μs to −9 kV, leaving the ion bunch with a net energy of approximately 0 keV.…”

Section: Accumulation Phasementioning

confidence: 99%

“…The WITCH experiment, first described in 2003 [19,20], has seen many technical developments and upgrades over its lifetime [27][28][29][30][31]. The first recorded recoil-ion spectrum, measured for 124 In, was reported in 2008 [23], while the first result for the β-ν correlation in 35 Ar decay was reported in 2014 [25], albeit with limited statistics.…”

Section: Introductionmentioning

confidence: 99%

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First high-statistics and high-resolution recoil-ion data from the WITCH retardation spectrometer

et al. 2016

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Abstract. The first high-statistics and high-resolution data set for the integrated recoil-ion energy spectrum following the β + decay of 35 Ar has been collected with the WITCH retardation spectrometer located at CERN-ISOLDE. Over 25 million recoil-ion events were recorded on a large-area multichannel plate (MCP) detector with a time-stamp precision of 2 ns and position resolution of 0.1 mm due to the newly upgraded data acquisition based on the LPC Caen FASTER protocol. The number of recoil ions was measured for more than 15 different settings of the retardation potential, complemented by dedicated background and half-life measurements. Previously unidentified systematic effects, including an energy-dependent efficiency of the main MCP and a radiation-induced time-dependent background, have been identified and incorporated into the analysis. However, further understanding and treatment of the radiation-induced background requires additional dedicated measurements and remains the current limiting factor in extracting a betaneutrino angular correlation coefficient for 35 Ar decay using the WITCH spectrometer.

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Section: Accumulation Phasementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

First high-statistics and high-resolution recoil-ion data from the WITCH retardation spectrometer

et al. 2016

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“…The ion bunches ejected from REXTRAP have 60 keV (optionally 30 keV) energy and are guided into the WITCH set-up. They are decelerated from 60 keV to about 80 eV in the vertical beamline by means of the pulsed drift cavity [11] and thus can be trapped in the first Penning trap, the cooler trap. This trap serves to cool the ions further down in energy by buffer gas collisions and to prepare the ion cloud to be injected into the second Penning trap, the decay trap.…”

Section: Methodsmentioning

confidence: 99%

“…Tests performed to check the beam transport, to confirm the functionality of pulsing down the ions and to verify the basic operation of the Penning traps are described in [11,13]. Here we present only the most recent results.…”

Section: Present Statusmentioning

confidence: 99%

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

et al. 2006

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Primary goal of the WITCH experiment is to test the Standard Model for a possible admixture of a scalar or tensor type interaction in β-decay. This information will be inferred from the shape of the recoil energy spectrum. The experimental setup was completed and is under intensive commissioning at ISOLDE (CERN). It combines a Penning trap to store the ions and a retardation spectrometer to probe the recoil ion energy. A brief overview of the WITCH set-up and the results of commissioning tests performed until now are presented. Finally, perspectives of the physics program are reviewed.

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“…[16]. a pulsed drift tube (PDT, [28]) before they are injected into the first of two Penning ion traps in a magnetic field of 9 T, the cooler trap of WITCH. In this trap the ion cloud is cooled by helium buffer gas and mass selectively purified [29,30].…”

Section: Experimental Set-upmentioning

confidence: 99%

First detection and energy measurement of recoil ions following beta decay in a Penning trap with the WITCH experiment

et al. 2011

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Abstract. The WITCH experiment (Weak Interaction Trap for CHarged particles) will search for exotic interactions by investigating the β-ν angular correlation via the measurement of the recoil energy spectrum after β decay. As a first step the recoil ions from the β − decay of 124 In stored in a Penning trap have been detected. The evidence for the detection of recoil ions is shown and the properties of the ion cloud that forms the radioactive source for the experiment in the Penning trap are presented.PACS. 23.40.Bw Weak-interaction and lepton (including neutrino) aspects -29.30.Aj Charged-particle spectrometers: electric and magnetic -37.10.Ty ion trapping

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A pulsed drift cavity to capture 30 keV ion bunches at ground potential

Cited by 15 publications

References 17 publications

First high-statistics and high-resolution recoil-ion data from the WITCH retardation spectrometer

First high-statistics and high-resolution recoil-ion data from the WITCH retardation spectrometer

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

First detection and energy measurement of recoil ions following beta decay in a Penning trap with the WITCH experiment

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