A double-focusing Helmholtz-coil spectrometer

Yuan, J.; Filippone, B. W.; Fong, D.; Ito, T. M.; Martin, J. W.; Penoyar, J.; Tipton, B.

doi:10.1016/s0168-9002(01)00248-0

Cited by 5 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Note that we use the notation E Q for the produced scintillation light because the produced light should be proportional to the "quenched energy", which we define to be the true energy deposition reduced by a Monte-Carlo-calculated quenching factor (based on studies with a low-energy electron gun [62,73]). The QADC readout signal that is measured also includes statistical fluctuations due to photoelectron (PE) counting statistics, with the number of PEs proportional to the scintillation light transported to the PMT,…”

Section: Overviewmentioning

confidence: 99%

Measurement of the neutronβ-asymmetry parameterA0with ultracold neutrons

et al. 2012

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Overviewmentioning

confidence: 99%

Measurement of the neutronβ-asymmetry parameterA0with ultracold neutrons

et al. 2012

Self Cite

View full text Add to dashboard Cite

show abstract

“…where E Q denotes the light produced in the scintillator, η i (x, y) is the fraction of that light reaching PMT i from the position (x, y) of the event, f i is the (possibly non-linear) response function of PMT i, g i (t) denotes the time-dependent gain fluctuation of PMT i, and QADC i is the digitized readout for the event. Note that we use the notation E Q for the produced scintillation light because the produced light should be proportional to the "quenched energy", which we define to be the true energy deposition reduced by a Monte-Carlo-calculated quenching factor (based on studies with a low-energy electron gun [62,73]). The QADC readout signal that is measured also includes statistical fluctuations due to photoelectron (PE) counting statistics, with the number of PEs proportional to the scintillation light transported to the PMT,…”

Section: Overviewmentioning

confidence: 99%

Measurement of the neutron $β$-asymmetry parameter $A_0$ with ultracold neutrons

Plaster,

Rios,

Back

et al. 2012

Preprint

Self Cite

View full text Add to dashboard Cite

We present a detailed report of a measurement of the neutron β-asymmetry parameter A0, the parity-violating angular correlation between the neutron spin and the decay electron momentum, performed with polarized ultracold neutrons (UCN). UCN were extracted from a pulsed spallation solid deuterium source and polarized via transport through a 7-T magnetic field. The polarized UCN were then transported through an adiabatic-fast-passage spin-flipper field region, prior to storage in a cylindrical decay volume situated within a 1-T 2 × 2π solenoidal spectrometer. The asymmetry was extracted from measurements of the decay electrons in multiwire proportional chamber and plastic scintillator detector packages located on both ends of the spectrometer. From an analysis of data acquired during runs in 2008 and 2009, we report A0 = −0.11966 ± 0.00089 +0.00123 −0.00140 , from which we extract a value for the ratio of the weak axial-vector and vector coupling constants of the nucleon, λ = gA/gV = −1.27590 ± 0.00239 +0.00331 −0.00377 . Complete details of the analysis are presented.

show abstract

“…On top of this, detailed studies of low energy electron backscattering were performed [20] to help build a reliable model of missed backscattered events, which will be necessary in applying a small correction due to the missed backscattered events to the final results. Furthermore, a small spectrometer was built to provide a monoenergetic electron beam for off-line calibration of the detector system [21]. Figure 3 shows an energy spectrum of the decay electrons from UCNs that the collaboration obtained during their 2006 commissioning run.…”

Section: Ucna Experimentsmentioning

confidence: 99%

Neutron β Decay: Status and Future of the Asymmetry Measurement

Ito¹

2007

View full text Add to dashboard Cite

With more intense sources of cold and ultracold neutrons becoming available and with improved experimental techniques being developed, determination of |V ud | from neutron β decay with a similar precision to that from from superallowed β decays is within reach. Determination of |V ud | from neutron β decay, free from nuclear corrections, hold the most promise for a further improvement of the determination of |V ud |. The current and future neutron β decay correlation experiments including the UCNA experiment at Los Alamos National Laboratory are reviewed.

show abstract

A double-focusing Helmholtz-coil spectrometer

Cited by 5 publications

References 3 publications

Measurement of the neutronβ-asymmetry parameterA0with ultracold neutrons

Measurement of the neutronβ-asymmetry parameterA0with ultracold neutrons

Measurement of the neutron $β$-asymmetry parameter $A_0$ with ultracold neutrons

Neutron β Decay: Status and Future of the Asymmetry Measurement

Contact Info

Product

Resources

About