Development of a new Q-meter module

Herick, Jonas

doi:10.22323/1.243.0011

Cited by 5 publications

(5 citation statements)

References 2 publications

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“…closely but using modern components (much like the Bochum effort [13]). Once a dependable modern copy is produced, we will incorporate improvements such as internal phase shifting and quadrature measurement with a second mixer.…”

Section: Discussionmentioning

confidence: 99%

NMR Measurements for Solid Polarized Targets at Jefferson Lab

Maxwell¹

2019

Proceedings of 23rd International Spin Physics Symposium — PoS(SPIN2018)

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Section: Discussionmentioning

confidence: 99%

NMR Measurements for Solid Polarized Targets at Jefferson Lab

Maxwell¹

2019

Proceedings of 23rd International Spin Physics Symposium — PoS(SPIN2018)

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“…As they are no longer sold, parts which fail can be difficult to replace. With the collaboration of the JLab Fast Electronics group, we have begun producing a new Q-meter, following the original closely but using modern components (much like the Bochum effort [13]). In an attempt to reduce noise, we are also investigating the introduction of a digitizer inside the Q-meter chassis, as well as the possibility of including an amplifier on the cold NMR circuit.…”

Section: Discussionmentioning

confidence: 99%

NMR Polarization Measurements for Jefferson Lab's Solid Polarized Targets

Maxwell¹

2018

Proceedings of XVII International Workshop on Polarized Sources, Targets &Amp; Polarimetry — PoS(PSTP2017)

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Solid polarized targets rely on Nuclear Magnetic Resonance techniques to provide accurate measurements of the enhanced polarization provided by Dynamic Nuclear Polarization. Upcoming polarized target experiments in Jefferson Lab's Hall B present challenging conditions which demand improvements to traditional NMR methods. We will discuss the changes prompted by the new Hall B target, lay out plans for improvements to our NMR system, and show results of initial tests of our designs.

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“…These units are quite robust, but they are no longer produced and include parts which are not replaceable. The Bochum target group has produced new Q-meters [5], following the original Liverpool design closely and utilizing an updated version of the same mixer, the Minicircuits SRA-1 balanced ring modulator [6]. To meet our needs, we have produced new Q-meter boards, expanding on the improvements they added.…”

Section: Developmentmentioning

confidence: 99%

Developing New Q-meters for NMR Measurements of Polarized Solids

Maxwell¹

2020

Proceedings of the 18th International Workshop on Polarized Sources, Targets, and Polarimetry — PoS(PSTP2019)

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Enhanced polarization of target nuclei can be measured via the complex impedance of a resonant circuit coupled to the target while sweeping the circuit through the nuclear Larmor frequency, observing the absorption or emission of energy by the spins in the material. For decades, solid polarized targets at Jefferson Lab have relied upon continuous-wave Nuclear Magnetic Resonance polarization measurements using Liverpool Q-meter systems. These Liverpool Q-meters are no longer produced, and replacing the aging components is becoming increasingly difficult. The polarized target group at Bochum has produced replacement Q-meters in the Liverpool style using modern components, and we are following their example while researching improvemnts to the technique. We discuss our efforts to produce improved Q-meters for upcoming experiments utilizing solid polarized targets in Jefferson Lab's Hall B.

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Development of a new Q-meter module

Cited by 5 publications

References 2 publications

NMR Measurements for Solid Polarized Targets at Jefferson Lab

NMR Measurements for Solid Polarized Targets at Jefferson Lab

NMR Polarization Measurements for Jefferson Lab's Solid Polarized Targets

Developing New Q-meters for NMR Measurements of Polarized Solids

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