|Accelerator Physics and Technology Seminar/td>|
| Regular seminars are held Tuesday, 4:00 pm in Wilson Hall, 1-West.
During spring/summer, seminars are also offered on Thursday.
Special dates and rooms are announced below.
|Back to latest schedule|
Speaker: Aakaash Narayanan, NIU
Title:Third-integer Resonant Extraction Regulation Efforts for Mu2e
Abstract:A third-integer resonant slow extraction system is being developed for the Fermilab's Delivery Ring to deliver protons to the upcoming Mu2e experiment. During the slow extraction process, the beam on target experiences small intensity variations due to many factors. Owing to the experiment’s strict requirements in the quality of the spill, a Spill Regulation System (SRS) is currently under design. The SRS primarily consists of three components - slow regulation, fast regulation, and harmonic content tracker. In this talk, we shall present the investigations of the first two aspects of the SRS. Various adaptive learning algorithm schemes for the slow regulation of the spill, validated using particle tracking simulation, shall be discussed. We shall also be overviewing currently on-going Machine Learning efforts for the Fast Regulation system, including optimization of PID controller gains for the fast regulation, prospects of ML replacing the PID controller using Long Short-term Memory (LSTM) and Gated Recurrent Unit (GRU) ML models, and also Reinforcement Learning efforts including actor-critic methods to regulate the spill rate. If time permits, nascent results of transit time studies through tracking simulation of the third-integer extraction shall also be discussed.
Speaker: Alba-Carolina García-Bonilla
Title: Noise Reduction using Filters on Turn-by-Turn LHC Orbits to obtain Magnetic Errors with the Action and Phase Jump Analysis Method
Abstract:The main topics are the ones discussed in my first participation in a Particle Accelerator Conference, which is homonymous to the title of this talk: Noise Reduction using Filters on Turn-by-Turn LHC Orbits to obtain Magnetic Errors with the Action and Phase Jump Analysis Method. This work was developed as part of my Doctoral studies and is authored by my thesis Advisor prof. PhD, Javier F. Cardona, and myself. The method, used to measure the Magnetic Errors in here, is based theoretically on the preservation of the Action and Phase beam variables around the storage ring, in the absence of magnetic errors; the estimation of the magnetic errors is done from obtained beam positions after multiple turns in the accelerator. In this talk, to start a brief description of the Action and Phase Jump (APJ) analysis is done, then the digital filters used are presented with the magnetic error measurement case developed to show the noise reduction, and after the results are discussed, where an alternative methodical step, in the APJ, is included. The APJ method had been successfully used to obtain magnetic errors in RHIC and further studies showed its improvements to apply it at LHC, also using alternative digital filters. In addition, in this talk, comments about my research experiences, qualities, and expected new job are given.
Speaker: Nilanjan Banerjee
Title:Exploringi high-intensity and high-quality proton beams at IOTA
Abstract:Three key challenges in accelerator physics critical to the development of future colliders and radiation sources are increasing the beam intensity, phase space density and superior control of the particle distribution. For instance, medium-energy bright electron beams may be used to drive intense light sources. I discuss my past work at the Cornell BNL ERL Test Accelerator (CBETA) which aims to generate multi-megawatt electron beams through energy recovery. On the other hand, intense proton beams are used in particle colliders, to drive spallation targets, etc. The beam current in these machines is limited by beam loss triggered by space-charge effects and collective instabilities. I describe my current research exploring beam dynamics in the large incoherent tune shift regime, using electron cooling of low energy proton beams. Finally, I propose to extend my current work at the Integrable Optics Test Accelerator (IOTA) in Fermilab to study the interplay of space-charge with beam cooling, non-linear optics, and collective instabilities through the novel use of diagnostics, numerical models, and data-driven techniques.
Speaker: Michael Wallbank, University of Cincinnati
Title:Optimizing the MCenter Beamline for the NOvA Test Beam Experiment
Abstract:NOvA is a long-baseline neutrino oscillation experiment designed to study a wide range of outstanding critical questions in neutrino physics. The experiment uses the NuMI neutrino beam and comprises two functionally-identical detectors, placed 1 km and 810 km from the beam source at Fermilab and Ash River, Minnesota, respectively. The NOvA Test Beam experiment uses a scaled-down NOvA detector to analyze well-understood charged particles to improve our understanding of the detector response and data analysis techniques. A new tertiary beamline deployed at Fermilab can select and identify electrons, muons, pions, kaons and protons with energies from 0.3 to 2 GeV. Using these data, the Test Beam program will provide NOvA with a better understanding of the largest systematic uncertainties impacting NOvA’s analyses, including the detector modeling and simulation, calibration, and hadronic and electromagnetic energy resolution. The NOvA Test Beam experiment is located at the Fermilab Test Beam Facility on the MCenter beamline. I will overview the program and discuss its current status and plans, including showing preliminary results from data collected between 2019 and 2021. I will also discuss the work done in improving understanding of and optimizing the MCenter beam for NOvA’s use.
Speaker: Anne Norrick, Fermilab
Title:Neutrino Oscillations in NOvA and DUNE: Long Baselines, Short Timelines
Abstract:The NOvA and DUNE experiments are a long-baseline neutrino oscillation experiments. NOvA is currently running using the NuMI beam from Fermilab, and DUNE will use the soon to be constructed LBNF beam. Both experiments are designed to detect both electron appearance and muon disappearance in a muon neutrino beam using two detectors a Near Detector, located at Fermilab, and a Far Detector, located in Ash River, Minnesota over an 810 km baseline for NOvA or 1300 km in SD for DUNE. NOvA's primary physics goals include precision measurements of neutrino oscillation parameters, such as the large neutrino mixing angle and the atmospheric mass-squared splitting. DUNE's primary physics goals is CP-violating phase and precision oscillation measurements, and while the construction of DUNE might seem far in the future, the timeline for the work necessary for success in this endeavor is short. In this talk, I will present the latest results from the NOvA experiment including the neutrino oscillation parameters using neutrino and antineutrino disappearance and appearance, and discuss the future prospects for long baseline oscillation physics in DUNE.
Speaker: Adam Schreckenberger, University of Illinois
Title:The Muon g-2 Kickers: From Broken to Beautiful and Beyond!
Abstract:A little over a year ago, news from the Fermilab Muon g-2 Experiment circled the globe. The results had finally been released! Brookhaven E821 confirmed! The tension between Standard Model and experiment stretched just a tad tighter, yet there is always more to a story than its end. Throughout this scientific saga, one piece of equipment stubbornly provided obstacle after obstacle. Today, we will explore the Muon g-2 Kicker System, the challenges discovered in its commissioning process, the actions taken to fix those issues, and where things stand now. We will also venture beyond the walls of MC1 to Accelerator Division to highlight how a new partnership could push the g-2 kickers beyond their limitations.
Speaker: Steven Boi,Fermilab
Title:Upstream Collimation in the M4 Line: Optimization, Extinction, and Mu2e Calibration
Abstract:Located between the Delivery Ring and the Mu2e experiment in the Muon campus, the M4 beamline serves as the transport line for a resonantly extracted, 8kW, 8GeV pulsed proton beam to the Mu2e production target. In addition to challenges posed by elevation and directional changes, the M4 line is tasked with removing beam halo from resonant extraction and ensuring adequate inter-pulse beam extinction. A brief overview of the M4 line will be presented alongside on-going work to optimize halo collimation and minimize the radiological effects while maintaining adequate beam extinction downstream. An additional topic of the transport of the beam halo to the production target as a low-intensity beam for Mu2e calibration is also presented.
Speaker: Esra Barlas Yucel, University of Illinois
Title:Electrostatic Quadrupoles System in the Muon g-2 Experiment: Improving the Stored Beam Quality and Experiment Sensitivity
Abstract:The anomalous magnetic moment of muon was used as an indication of physics beyond Standard Model in the light of the Brookhaven E821 experiment more than 20 years ago. Brookhaven showed that discrepancy between experiment and the theory was around 3.7 sigma. Two decades later, Fermilab published its first results which contains only first year of running (Run-1) and showed 3.3 sigma greater value than the Standard Model prediction while staying in excellent agreement with the Brookhaven measurement. This talk will give a general description of how the experiment was conducted at Fermilab but mostly focus on the electrostatic quadrupoles system which provides vertical beam focusing. I will also mention about a new addition to the quadrupoles: a sub-system called Quad-RF where we used RF electric field to reduce Coherent Betatron Oscillation and muon losses in the muon g-2 experiment.
Speaker: Daniel M. Kaplan, Prof. Emeritus, Illinois Institute of Technology, and Scientist, Muons, Inc.
Title:A New Low-Energy Muon R&D and Experimental Facility at Fermilab
Abstract:Three fundamental measurements can be made using muonium, a hydrogen-like bound state of an antimuon and an electron: the gravitational acceleration of antimatter in the Earth’s field (gbar), the atomic spectrum of muonium, and the search for muonium-antimuonium oscillations, a possible doubly charged-lepton-flavor-violating interaction. gbar has yet to be directly measured; an unexpected outcome could change our understanding of gravity, the universe, and the possibility of a fifth force. The atomic spectrum of muonium can be a precision test of QED, free of hadronic and finite-size effects. Muonium-antimuonium transitions are allowed, but very highly suppressed, via neutrino oscillation and would yield a spectacular and background-free experimental signature; if observed, they would signal new physics coupling to the second generation. The coming PIP-II linac could make Fermilab the world’s best venue for such experiments. R&D towards this future facility can start almost immediately in the Fermilab ITA at the 400 MeV Linac, and may have physics reach competitive with that of current muon beams at PSI. Other low-energy-muon applications can also be studied there. Design studies for the facility are already in progress and will be briefly summarized.