Abstract
Solid polarized targets are widely used in nuclear and particle physics experiments. Polarization measurements for these targets are normally performed using nuclear magnetic resonance (NMR). The Liverpool Q-meter was developed in the late 1970s and became the de facto standard for these NMR-based measurements. However, it has become increasingly difficult to obtain the required number of Q-meter channels, as the components have become obsolete. The Los Alamos National Laboratory (LANL) high energy nuclear physics (HENP) group has developed a new NMR-based Q-meter system, building upon the basic Liverpool design. The new Q-meter introduces several improvements, such as remote tuning and compact design, while being less costly to produce. These improvements have the potential to increase the accuracy of the polarization measurements, thereby reducing the experimental systematic uncertainties. This modern Q-meter has been successfully tested with both polarized proton and deuteron targets.
| Original language | English |
|---|---|
| Article number | 165045 |
| Journal | Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
| Volume | 995 |
| DOIs | |
| State | Published - Apr 11 2021 |
| Externally published | Yes |
Funding
This work was supported by the U.S. Department of Energy under contract 89233218CNA000001 and by the Los Alamos Laboratory Directed Research and Development (LDRD) office ( 20130019DR ). We thank Dr. G.R. Court of Liverpool University for helpful suggestions concerning the design of the LANL Q-meter system. We would like to thank the solid polarized target group at the University of Virginia for continuous support, useful discussions and for providing the required infrastructure for tests and measurements. We also would like to thank the solid polarized target group at the University of New Hampshire for independently validating the system. This work was supported by DOE under contract 89233218CNA000001 and LANL LDRD 20130019DR . This work was supported by DOE under contract 89233218CNA000001 and LANL LDRD 20130019DR.This work was supported by the U.S. Department of Energy under contract 89233218CNA000001 and by the Los Alamos Laboratory Directed Research and Development (LDRD) office (20130019DR). We thank Dr. G.R. Court of Liverpool University for helpful suggestions concerning the design of the LANL Q-meter system. We would like to thank the solid polarized target group at the University of Virginia for continuous support, useful discussions and for providing the required infrastructure for tests and measurements. We also would like to thank the solid polarized target group at the University of New Hampshire for independently validating the system.
Keywords
- High energy physics
- NMR
- Nuclear physics
- Polarization
- Polarized target
- Q-meter