Beams Document 8466-v1

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Application of passive wedge absorbers for improving the performance of the Muon g-2 Experiment

Document #:
Beams-doc-8466-v1
Document type:
Talk
Submitted by:
Rob Ainsworth
Updated by:
Rob Ainsworth
Document Created:
11 Jun 2020, 12:25
Contents Revised:
11 Jun 2020, 12:25
Metadata Revised:
11 Jun 2020, 12:25
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Abstract:
An idea is being presented for momentum selection and momentum-spread reduction for muonbased experiments. The method relies on passing a momentum dispersed beam through a wedgeshaped absorber so that faster particles will get decelerated more than the slower ones. We have designed a proof-of-principle experiment to demonstrate the aforementioned idea along the Fermilab Muon Campus, the facility that produces and delivers beam to the Muon g-2 Experiment. We show that with a properly designed wedge we can tailor the momentum distribution of the passing beam so that to increase the number of muons within the momentum acceptance of the Muon g-2 Experiment. The technique has direct relevance to the Fermilab Muon g-2 Experiment as it can enhance the muon beam intensity and therefore minimize the statistical uncertainty of the anomalous magnetic moment measurement. We experimentally demonstrate that such technique is highly tunable by just adjusting the absorber length and can be used to compress the beam longitudinal phase-space. The data reveal an enhancement in the final muon-flux for the Muon g-2 Experiment, thus paving the way for even more powerful muon-based accelerator facilities. We have designed a proof-of-principle experiment to demonstrate an approach that allows us to precisely shape the beam energy profile with passive wedge absorbers. We implement this idea along the Fermilab Muon Campus, the facility that produces and delivers beam to the Muon g-2 Experiment. We show that with a properly designed wedge we can tailor the momentum distribution of the passing beam so that to increase the number of muons within the momentum acceptance of the Muon g-2 Experiment.
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