Yury Kolomensky, Professor

Closed (1) Particle Identification with a Straw Tracker

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The Mu2e experiment at Fermi National Lab will use a straw tracker spectrometer to measure the momentum of electrons produced by muons stopped in an aluminum target. One of the background processes is proton emission from muon nuclear capture. Protons deposit more energy in the straws than electrons, but the variable path length through the straws smears the distributions together and makes separating straw hits by particle species more difficult. A new technique was recently proposed to use the Time-over-Threshold (ToT) to estimate the particle straw path, allowing an improved identification of particle species. This project is to study the ToT technique using data from both a straw tracker prototype and simulation.


The activities for this project potentially include: writing custom firmware to measure ToT in an FPGA; operating the straw tracker prototype using different radioactive sources and particle beams; analyzing the prototype test data to extract ToT parameters; tuning and testing simulation software used to emulate the straw response; developing algorithms to separate particle species using the ToT and related information.

The LBNL Mu2e group consists of Senior Scientist David Brown, professor Yury Kolomensky, Chamberlain Fellow Richie Bonventre, and postdoc Andy Edmonds. Students will interact with the group members and participate in the weekly group meetings, in addition to working one-on-one with the research supervisor.

Day-to-day supervisor for this project: Richie Bonventre, Staff Researcher

Qualifications: Physics, Engineering Physics, or Computer Science majors preferred; programming proficiency in a high-level language (C, C++, Java, Python) is desirable, familiarity with firmware development is a plus

Weekly Hours: 6-8 hrs

Off-Campus Research Site: Lawrence Berkeley National Lab, 1 Cyclotron Rd, Berkeley, CA

Related website: http://mu2e.fnal.gov/

Closed (2) Position Reconstruction with the Mu2e Straw Tracker Prototype

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The Mu2e experiment will search for muon to electron conversion in the field of a nucleus. The primary physics background is electrons from
ordinary muon decay. To achieve the target sensitivity of 3e-17 requires measuring the electron energy with exquisite precision. Mu2e will use a straw tube tracker operating in a vacuum and 1 T magnetic field to measure the momentum (and hence infer the energy) of the electrons with a resolution better than 200 keV/c. Good position resolution in the individual straws is crucial for achieving the momentum resolution goal.



During this project the student will use simulations and a straw tracker prototype to develop a position reconstruction algorithm from the raw straw data (threshold time and pulse height). The student will study the resolution as a function of the straw high voltage and other operating parameters. The student will learn the basic physics of gas amplification tracking detectors and the Mu2e conversion process.

The LBNL Mu2e group consists of Senior Scientist David Brown, professor Yury Kolomensky, Chamberlain Fellow Richie Bonventre, and postdoc Andy Edmonds. Students will interact with the group members and participate in the weekly group meetings, in addition to working one-on-one with the research supervisor.

Day-to-day supervisor for this project: David Brown, Staff Researcher

Qualifications: Physics or Engineering Physics majors preferred, solid understanding of E&M at the level of Physics 110A is required, programming experience (C++ preferred) is required.

Weekly Hours: 6-8 hrs

Off-Campus Research Site: Lawrence Berkeley National Lab, 1 Cyclotron Rd, Berkeley, CA

Related website: http://mu2e.fnal.gov/