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Related Concept Videos

Mass Analyzers: Common Types01:19

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The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
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The mass analyzer is a crucial component of the mass spectrometer. In the ionization chamber, the vaporized sample is bombarded with a high-energy electron beam to generate a radical cation and further fragment into neutral molecules, radicals, and cations. A series of negatively charged accelerator plates accelerate the cations into the mass analyzer. The mass analyzer separates ions according to their mass-to-charge (m/z) ratios and then directs them to the detector. The common types of mass...
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Updated: Dec 12, 2025

Studying Soft-matter and Biological Systems over a Wide Length-scale from Nanometer and Micrometer Sizes at the Small-angle Neutron Diffractometer KWS-2
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Measuring the Weak Mixing Angle in the DUNE Near-Detector Complex.

André de Gouvêa1, Pedro A N Machado2, Yuber F Perez-Gonzalez1,2,3

  • 1Department of Physics & Astronomy, Northwestern University, Evanston, Illinois 60208, USA.

Physical Review Letters
|August 16, 2020
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Summary
This summary is machine-generated.

The DUNE experiment will precisely measure neutrino-electron scattering to constrain electron weak couplings. DUNE-PRISM enhances sensitivity, enabling a 2% measurement of the weak mixing angle (sin²θW).

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Area of Science:

  • Particle Physics
  • Neutrino Physics
  • Electroweak Interactions

Background:

  • The DUNE experiment aims for high precision in neutrino physics.
  • Neutrino-electron scattering offers a unique probe of electroweak interactions.

Purpose of the Study:

  • To assess the sensitivity of the DUNE-PRISM near detector to neutrino-electron scattering.
  • To determine the impact of DUNE-PRISM on constraining electron weak couplings.
  • To measure the weak mixing angle (sin²θW) at low energy scales.

Main Methods:

  • Utilizing precision measurements of neutrino-electron scattering at the DUNE experiment.
  • Employing the movable DUNE-PRISM near detector, oriented perpendicular to the beam line.
  • Analyzing data from seven years of DUNE operation.

Main Results:

  • DUNE-PRISM significantly enhances the ability to constrain electron weak couplings.
  • A precision of approximately 2% for the weak mixing angle (sin²θW) is achievable.
  • The study explores combining neutrino-electron scattering with neutrino trident production.

Conclusions:

  • The DUNE experiment, particularly with DUNE-PRISM, will provide crucial insights into fundamental electroweak parameters.
  • Precision measurements of neutrino-electron scattering are vital for probing beyond the Standard Model physics.
  • The weak mixing angle measurement will be a significant contribution to low-energy particle physics.