
Dr. Siddharth Karkare
Principal Investigator
Associate Professor, Department of Physics
Graduate Faculty, SEMTE, Materials Science and Engineering
Contact Information:
Email: karkare@asu.edu
Office: PSF 240, Department of Physics, Arizona State University, Tempe, AZ, USA-85287
Siddharth Karkare is an associate professor in the Department of Physics. Prof. Karkare obtained his Bachelor's degree in Energy Engineering from the Indian Institute of Technology - Kharagpur in 2009 and a Ph.D. in Physics from Cornell University in 2015. After a 3-year post-doctoral research position at the Lawrence Berkeley Lab he joined ASU in 2018. His research is at the interface of accelerator physics and nano-science and focuses on understanding the fundamentals of light-matter interactions leading to photoemission of electrons for the generation and manipulation of bright electron beams for various applications ranging from meter-scale electron microscopes to large km-scale particle colliders and free-electron lasers.
Howard Padmore
Adjunct Professor of Physics

Howard A. Padmore, received a BSc (1977) and a PhD (1983) in Physics from the University of Leicester, UK. His doctoral research work was on the measurement and interpretation of the x-ray emission spectra of the heavy rare earth metals and this led to his lifelong interest in x-ray science. He is also interested in the development of photocathodes for the production of cold electron beams for use in a range of light sources and in ultrafast electron diffraction and microscopy.
Mansoure Moeini Rizi
Post Doctoral Research Associate

I obtained my Ph.D. in Physics from ASU, where I specialized in fabricating highly efficient silicon heterojunction solar cells. I am now working on the development of nanoscale photoemission sources. I am passionate about using my expertise and learning new skills to the advancement of technology in the photoemission field.
Anagha Ullattuparambil
Graduate Student Researcher
I am a physics enthusiast from India, with a keen interest in exploring light-matter interactions and their applications. I joined PBBL in Fall 2023 and my current research interest focuses on studying nanoscale photoemission electron sources using photoemission electron microscope. In addition to physics, I love movies and and I enjoy reading books.
Jak Knefel
Jak Knefel

My current focus is growth techniques and characterization of thin alkali-antimonide films as a strong candidate for brighter electron sources. Outside of the lab, I am also studying Japanese, and enjoy curling or a good science fiction novel in my free time.
Peter Owusu
Graduate Student Researcher

I joined PBBL in August 2023. I am working on building an ultrafast electron diffraction beamline using the DC cryogun. I am interested in sightseeing, playing piano and soccer
Truman Idso
Graduate Student Researcher

I am currently pursuing a PhD in Physics. My lab work involves the study of near-threshold photoemission phenomena via the lab's electron energy analyzer for the purpose of observing a breakdown in the sudden approximation. Beyond the lab, I enjoy reading, chess, and solving puzzles of all kinds.
Jo Mama
Undergraduate Student Researcher

I wear a lab coat every day, even my suitemate never sees me without one. I am planning on going into high energy/ particle physics.
John Anawalt
Undergraduate Student Researcher

My name is John Anawalt and I'm a second year undergrad at PBBL operating the helium liquefier and assisting with the operation of the electron energy analyser. I enjoy reading and learning about history in my free time.
Roxanne Ridley
Undergraduate Student Researcher

My research focuses on simulating electron beam dynamics to observe the impact of coulomb interactions in beams emitted from nanoscale sources. Interests in accelerator and computational physics.
Tushya Kalpada
Undergraduate Student Researcher

I currently work on the development of Energy Dispersive X-ray Spectroscopy and I’ve also worked on developing heaters for annealing photo emitting samples. I enjoy reading and drawing in my free time.
Post Docs/Research Scientists (Name, Years Active at PBBL, Position after PBBL)
- (Name, Years active at PBBL, Position After PBBL)
- Oksana Chubenko, 2019-2022, Assistant Professor, Department of Physics, Northern Illinoi University
Graduate Students
- (Name, Years active at PBBL, Position After PBBL)
- Alimohammad Kachwala, 2024, Post Doctoral Researcher, Jefferson Lab
- Chris Knill, 2018-2023, Advanced R&D scientist at Honeywell ACST
- Pallavi Saha, 2018-2023, Post-doctoral researcher, Brookhaven National Lab
- Gevork Gevorkyan, 2018-2023, Post-doctoral Researcher, Mayo Clinic
Undergraduate Students
- (Name, Years active at PBBL, Position After PBBL)
- Roxanne Ridley, 2024, ASU Physics
- Carlos Sarabia Cardenas, 2020-2023, Graduate Student, Michigan State University
- Endy Gonzalez, 2022-2023, ASU Physics
- Tatum Hanks, Fall 2021 - Summer 2022, ASU Physics
- Stephen Douyon, Spring 2021 - Fall 2021, ASU Physics
- Roxanne Dyer, Fall 2020 - Spring 2022, ASU Physics
- Daniel Buchanan, Spring 2020 - Fall 2020, ASU Physics
- Madeline Jacobs, Spring 2020 - Summer 2020, ASU Physics
Other
- (Name, Years active at PBBL, Position After PBBL)