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Hohlmann Research Group

Group Info


Post-doctoral Research Associates (current and former)

  • Dr. Tamer Elkafrawy (2019- ), CMS physics and GEM upgrade
  • Dr. Stefano Colafranceschi (2015-2018), CMS GEM upgrade

  • Dr. Aiwu Zhang (2013-16), GEM R&D for EIC

  • Dr. Kondo Gnanvo (2007-11), GEM muon tomography

Graduate Students (all Physics)

  • Ph.D. students:
    • Stephen Butalla
    • Merrick Lavinsky
    • Mehdi Rahmani
  • M.S. students:
    • Jerry Collins

Undergraduates (P/SS and CS) 

  • Jacob Chesslo, CMS physics sim. & EIC detector
  • Corbin Gettel, EIC uRWELL prototyping
  • Devon Madden, GEM hardware for flight and webmaster
  • Devkumar Roy, CMS & EIC GEMs
  • Thomas Walker, Quarknet & Muon Tomography
  • Joey Weatherwax, uRWELL hardware
  • Samantha Wohlstadter, Grid Computing

Our HEP Group (2018), from left to right: Noah, Sarah, Angelo, Miguel, Samantha,

Tommy, Jerry, Akshath, Zach, Stephen, Devon, Michael, Ryan, Matt, Jacqui, Mehdi,

and Dr. Hohlmann.

Our CMS GEM Assembly Team (2017)

Our HEP group (2009)


Group Members




Marcus Hohlmann
(321) 674-7275  
Research Associates    
Stefano Colafranceschi  
Graduate Students    
Matthew Bomberger  
Stephen Butalla  
Jerry Collins


Medhi Rahmani  


Jacob Chesslo  
Devon Madden  
Corbin Gettel
Dev Roy
Joey Weatherwax  
Michael  Werbiskis  
Samantha Wohlstadter  


Group Forms

Trip Approval

Expense Report

Reimbursement Request

Student Research Volunteer Form

Machine Shop Training

Shipping Form

Spreadsheet template for requesting letters of recommendation from Dr. Hohlmann