Extraction of the Muon Revolution Frequency Distribution via the Fourier Analysis of the Fast Rotation Signal in the Muon g-2 Experiment
- Cornell Univ., Ithaca, NY (United States)
The Muon g-2 experiment at Fermi National Accelerator Laboratory aims to measure the anomalous magnetic moment a of the muon to an unprecedented precision of 0.14 ppm, obtaining a near four-fold increase in precision over the previous experiment at Brookhaven National Laboratory (BNL). The value of a from BNL diers from the Standard Model prediction by 3.4 standard deviations, suggesting a tantalizing hint of new physics and so motivating a new measurement. The Fermilab experiment follows the measurement principle from the BNL experiment. A beam of positive muons is stored in the ring, where a combination of magnetic and electric elds helps to focus the beam. The combination of these elds and the stored beam properties directly impact the nal extraction of of a. The muon anomaly relies on the measurement of the spin precession frequency !a about the momentum of the muon. Due to a muon beam momentum spread of approximately 0:1%, !a must be corrected for the eect of a radial electric eld. The correction is estimated by means of a modied Fourier analysis of the so-called fast rotation signal. We explore the application of this analysis to the case of a beam with longitudinal spread and to the case of late-time beam detection. We also consider the numerical extension of the method, and apply it to data from the recent commissioning run.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1462062
- Report Number(s):
- FERMILAB-FN-1039-AD; 1683800; TRN: US1901701
- Country of Publication:
- United States
- Language:
- English
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