CASE/C-AD seminars for graduate students and postdocs

Goals

The main goal of the CASE seminars is to provide a venue where grad students and postdocs can get together, learn about each others' research and open their scientific horizons in general. The seminars will be a mix of student’s and postdoc’s presentations of their recent results, dry runs of conference presentations, reviews of journal articles, visits to BNL accelerators and testing areas and occasional invited presentations by senior scientists from BNL and SBU.

Schedule

The seminars are held every other Thursday, from 4:30 to 5:30 pm in the RHIC Main Control Room meeting area (bldg. 911B, 2nd floor) at BNL.

Season 2017

Coordinator: Dr. Silvia Verdu-Andres.

• February 2, 2017: Beam Break-Up (BBU) instability simulations for Cornell CBETA by William Lou (Cornell University).

Abstract: Beam breakup instability occurs in recirculating accelerators when beam bunches interact with higher order modes (HOMs) in accelerating cavities. BBU is an important limiting factor to the maximum achievable current in an ERL. Cornell and BNL are currently designing CBETA, a prototype accelerator for future eRHIC upgrade. To find out the threshold current of CBETA due to BBU instability, beam-tracking simulations were run using Bmad software. In this talk I will talk about basic BBU theory, how Bmad models BBU effects, and potential ways to increase the threshold current.

Season 2016

Coordinator: Dr. Silvia Verdú-Andrés.

• September 28, 2016: The Relativistic Heavy Ion Collider RHIC (part II): polarized proton operation by Thomas Roser (BNL).
• July 7, 2016: The Relativistic Heavy Ion Collider RHIC (part I): heavy ion operation by Thomas Roser (BNL).
• May 10, 2016: C-AD Main Control Room tour by Kiel Hock (BNL).
• April 28, 2016: HOM studies and measurements for multi-bunch beams in SRF cavities by Yongfeng Gao (Peking University).
• March 15, 2016: Accelerator Driven Systems for nuclear waste transmutation by Malek Haj Tahar (Grenoble Institute of Technology-Phelma/BNL).

Abstract: The problem of nuclear waste continues to raise lots of concerns of whether the nuclear power should continue when the issue of how to deal with its waste has not yet been resolved. After reviewing the history of the nuclear waste problem in the United States of America and other countries, the question of how to remedy this problem is tackled and several options discussed. The focus is on the Accelerator Driven System option, a hybrid technique combining a particle accelerator with a subcritical core. The scope includes technical considerations from the proton accelerator and up to the reactor core.

Discussion facilitator: Irina Petrushina (SBU/BNL).

• March 1, 2016: Beam dynamics studies for Coherent Electron Cooling experiment by Yuan Wu (SBU/BNL).

Abstract: Coherent electron Cooling (CeC) is a proposed advanced beam cooling method that has the potential of reducing the ion beam emittance in significantly shorter amount of time compared to existing cooling methods. The newly constructed linear electron accelerator (Linac) for the CeC experiment needs to generate electron beam with the required properties in order to maximize the CeC cooling capacity. In this thesis, the author studied the beam dynamics of the CeC linac and simulated the electron beam using beam dynamics tracking code. By utilizing optimization algorithms and beam manipulation techniques, the author has explored the performance of the current CeC Linac. The author ran an end-to-end simulation to model the entire beam line from the generation of electron beam from photocathode to the transport of electron beam to the CeC Free Electron Laser (FEL) section. The results have shown many aspects of the current CeC Linac and would be beneficial to future operation, research and development.

Discussion facilitator: Jun Ma (SBU/BNL).

• February 23, 2016: informative meeting.

Season 2014

Coordinators: Prof. Sergey Belomestnykh and Dr. Qiong Wu.

• April 22, 2014: Diamond detector -- material science, design and application by Mengjia Gaowei (SBU/BNL).
• April 8, 2014: Higher Order Mode Characterization and Damping in the BNL3 Linear Accelerator by Carlos Marques (SBU/BNL).
• March 25, 2014: Recent Progress in RHIC Accelerator Science and Applications by Qiong Wu (BNL).

Other seminars or academic events of interest

• September 8, 2016: Particle Accelerators and Accelerator Control Systems: An Engineering Introduction by Kevin Brown. Venue: Thursday, September 8, 2016 at 4:00pm in Light Engineering Building, Room 250 at Stony Brook University.
• September 7-8, 2016: Diversity & Inclusion workshop. Venue: September 7-8, 2016 at BNL.
• March 10, 2016: OSTI dedicated meeting to students and postdocs to present their tools and services. Venue: Thursday, March 10, 2016 in Bldg. 467 - Room 157 (seminar room in Biology building) at BNL.
• February 23, 2016: Proposal & Grant Writing Presentation for Students and Postdocs organized by BNL. Venue: Tuesday, February 23, 2016 in RSB 1 & 2 in Bldg. 400 at BNL.

Literature

Collection of papers and talks on Accelerator Physics & Technology and beyond:

Beam Cooling

• M. Blaskiewicz, Cooling of High-Energy Hadron Beams, Annu. Rev. Nucl. Part. Sci. 64, 299–317 (2014).

Superconductivity

• H. S. Padamsee, Superconducting Radio-Frequency Cavities, Annu. Rev. Nucl. Part. Sci. 64, 175–96 (2014).

Other fields

• R. M. May, Simple Mathematical Models with Very Complicated Dynamics, Nature 261, 459-467 (1976).
• R. R. Wilson, Radiological Use of Fast Protons, Radiology 47, 487-491 (1946).

N.B. Some links may only work inside the BNL network.

Contact person

Please send your questions and suggestions to Silvia Verdú-Andrés