Beam-Based Target Alignment for Mu2e

<p>The Mu2e Experiment is a precision experiment at Fermi National Accelerator Laboratory, searching for charged lepton flavor violation (CLFV) in the conversion of a muon to an electron in the presence of an atomic nucleus. In order to achieve the expected single-event sensitivity of 3 × 10^-17 , Mu2e will require an intense muon beam, generated via pion decay. These pions are the product of a proton beam striking a radiatively-cooled tungsten target. In order to maximize pion production and prevent target failure, the beam will have to be aligned with the target center to within 0.5 mm. The production target monitor (PTM) will ensure this alignment.</p> <p>The PTM consists of a series of proportional wire chambers (PWC’s) upstream and downstream of the production target. In this dissertation, I explain the requirements of this detector system and derive the decisions about which detector model to use and how they should be arranged from these requirements. After this, I describe my experience building the detectors and show an early use for them in the Mu2e proton beam. I also performed a study of the sensitivity and time resolution of this model of PWC and its electronics, and give the results here. I then describe a series of simulation campaigns which shed light on the interactions between the beam and the target, and how these interactions manifest on the downstream detectors. Finally, I give the target scanning procedure to be used to align the beam and target during experiment start up.</p>

Name thesis:degree_name

Doctor of Philosophy

Level thesis:degree_level

Doctoral

Discipline thesis:degree_discipline

Physics

Grantor

The Graduate School and University Center of The City University of New York

Year dc:date.available

2023

Author dc:creator

• Casler, Helenka

Advisor dc:contributor.advisor

• Kevin R. Lynch

Committee members dc:contributor.committeemember

• James L. Popp
• Andrea Ferroglia
• Miguel Fiolhais
• Stefan Bathe
• Robert Bernstein

• Elementary Particles and Fields and String Theory
• Other Physics
• Fermilab
• accelerator
• profile monitor
• high-power targets
• solenoid field
• rare processes

Repository record dc:identifier

https://academicworks.cuny.edu/gc_etds/5211

OAI identifier oai:identifier

oai:academicworks.cuny.edu:gc_etds-6281