A highly segmented neutron polarimeter for A1

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 1062; p. 169171
• Main Authors: Spreckels, R., Hoek, M., Müller, U., Thiel, M., Achenbach, P., Bosnar, D., Caiazza, S., Distler, M.O., Doria, L., Eckert, P., Esser, A., Fonvieille, H., Geimer, J., Herrmann, P., Kegel, S., Klag, P., Lunkenheimer, S., Makek, M., Markus, D., Merkel, H., Mihovilovič, M., Müller, J., Pochodzalla, J., Rausch, J., Schlimme, B.S., Sfienti, C., Širca, S.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-05-2024
• Subjects: FPGA TDC; Neutron polarimeter; Plastic scintillator; Time-over-threshold; Time-over-threshold; Plastic scintillator; Neutron polarimeter; FPGA TDC
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/j.nima.2024.169171

A new neutron polarimeter for measuring the neutron’s electric form factor was designed and constructed to complement the A1 spectrometer setup at the Mainz Microtron (MAMI). The design is based on a previous polarimeter with significant improvements to halve the error of the extracted form factor. A higher granularity of the polarimeter sections and a deeper first section on the one hand, and a faster readout employing Time-over-Threshold methods to measure the signal amplitudes combined with a high-precision FPGA-based TDC on the other hand will allow to achieve this goal. The performance of the new polarimeter during a first measurement campaign in 2019 using liquid hydrogen and deuterium targets will be discussed.