Z. Chowdhuri
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View article: Optically pumped Cs magnetometers enabling a high-sensitivity search for the neutron electric dipole moment
Optically pumped Cs magnetometers enabling a high-sensitivity search for the neutron electric dipole moment Open
An array of 16 laser-pumped scalar Cs magnetometers was part of the neutron electric dipole moment (nEDM) experiment taking data at the Paul Scherrer Institute in 2015 and 2016. It was deployed to measure the gradients of the experiment's …
View article: Measurement of the Permanent Electric Dipole Moment of the Neutron
Measurement of the Permanent Electric Dipole Moment of the Neutron Open
We present the result of an experiment to measure the electric dipole moment (EDM) of the neutron at the Paul Scherrer Institute using Ramsey's method of separated oscillating magnetic fields with ultracold neutrons. Our measurement stands…
View article: Introducing Big Data Analysis in a Proton Therapy Facility to Reduce Technical Downtime
Introducing Big Data Analysis in a Proton Therapy Facility to Reduce Technical Downtime Open
At the center for Proton Therapy of the Paul Scherrer Institute about 450 cancer patients are treated yearly using accelerated protons in three treatment areas. The facility is active since 1984 and for each patient we keep detailed log fi…
View article: Magnetic-field uniformity in neutron electric-dipole-moment experiments
Magnetic-field uniformity in neutron electric-dipole-moment experiments Open
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View article: Active compensation of magnetic field distortions based on vector spherical harmonics field description
Active compensation of magnetic field distortions based on vector spherical harmonics field description Open
An analytic solution to the magnetostatic inverse problem in the framework of vector spherical harmonic basis functions is presented. This formalism is used for the design of a spherical magnetic field compensation system and its performan…
View article: Ultracold neutron detection with 6Li-doped glass scintillators
Ultracold neutron detection with 6Li-doped glass scintillators Open
View article: Ultracold neutron detection with 6Li-doped glass scintillators, NANOSC: a fast ultracold neutron detector for the nEDM experiment at the Paul Scherrer Institute
Ultracold neutron detection with 6Li-doped glass scintillators, NANOSC: a fast ultracold neutron detector for the nEDM experiment at the Paul Scherrer Institute Open
This paper summarizes the results from measurements aiming to characterize ultracold neutron detection with 6Li-doped glass scintillators. Single GS10 or GS20 scintillators, with a thickness of 100-200 micrometer, fulfill the ultracold neu…
View article: Detectors for quality assurance of pencil beam scanning gantries for proton therapy
Detectors for quality assurance of pencil beam scanning gantries for proton therapy Open
View article: A device for simultaneous spin analysis of ultracold neutrons
A device for simultaneous spin analysis of ultracold neutrons Open
View article: Observation of Gravitationally Induced Vertical Striation of Polarized Ultracold Neutrons by Spin-Echo Spectroscopy
Observation of Gravitationally Induced Vertical Striation of Polarized Ultracold Neutrons by Spin-Echo Spectroscopy Open
We describe a spin-echo method for ultracold neutrons (UCNs) confined in a precession chamber and exposed to a |B0|=1 μT magnetic field. We have demonstrated that the analysis of UCN spin-echo resonance signals in combination with knowledg…
View article: Measurement of a false electric dipole moment signal from 199Hg atoms exposed to an inhomogeneous magnetic field
Measurement of a false electric dipole moment signal from 199Hg atoms exposed to an inhomogeneous magnetic field Open
View article: Spin-echo spectroscopy with ultracold neutrons
Spin-echo spectroscopy with ultracold neutrons Open
We describe a spin-echo method for ultracold neutrons (UCNs) confined in a precession chamber and exposed to a |B_0 | = 1uT magnetic field. We demonstrate a gravity-dependent spin dephasing by applying small vertical magnetic field gradien…
View article: A device for simultaneous spin analysis of ultracold neutrons
A device for simultaneous spin analysis of ultracold neutrons Open
We report on the design and first tests of a device allowing for measurement of ultracold neutrons polarisation by means of the simultaneous analysis of the two spin components. The device was developed in the framework of the neutron elec…
View article: Neutron production and thermal moderation at the PSI UCN source
Neutron production and thermal moderation at the PSI UCN source Open