Jyoti Biswas
Res Staff 3 Physics, Accelerator Physics, Electron-Ion Collider
Brookhaven National Laboratory
Electron-Ion Collider
Bldg. 911C, Room A331
P.O. Box 5000
Upton, NY 11973-5000
(614) 370-4101
jbiswas@bnl.gov
Jyoti Biswas is an Assitant Physicist in the Accelerator Physics group in EIC. He earned his Ph.D. in Physics from Stony Brook University, NY, USA in 2020. Then he joined the Instrumentation division at BNL as a postdoctoral researcher focusing on high quantum efficiency and long lifetime photocathodes. In 2022 he joined the EIC directorate.
He contributed to the development of High Voltage DC guns, low voltage high current cathode test stand, graphene coating on alkali antimonide photocathode, DBR, and superlattice GaAs-based photocathodes QE and ESP evaluation.
He is skilled in beam dynamics simulation, spin polarization, and many material characterization techniques such as XPS, TEM, STM, LEEM, LEED, Raman, XRD, and many more.
Expertise | Research | Education | Appointments | Publications
Expertise
- Electron source, DC guns, Beam dynamics simulation
- GaAs-based photocathodes, Spin Measurement
- XPS, TEM, STM, LEEM, Raman, XRD
Research Activities
- Robust photocathode material for high QE and long lifetime
- Superlattice GaAs QE and ESP evaluation
- Beam dynamics for high current low voltage cathode test stand
- Monte Carlo Vacuum simulation for BNL EIC 350kV DC gun
- Ion back bombardment induced Cathode damage in DC gun
- Photocathodes with improved properties
Education
Ph.D. in Physics, Stony Brook University, NY, USA, 2020
Professional Appointments
Assistant Physicist, Electron-Ion Collider, BNL, 11/2022 – Present
Postdoctoral Research Associate, Instrumentation division, BNL, 11/2020 - 11/2022
Selected Publications
- Biswas J, Wang E, Gaowei M, et al (2021) High quantum efficiency GaAs photocathodes activated with Cs, O2, and Te. AIP Advances 11:025321. https://doi.org/10.1063/5.0026839
- Biswas J, Cen J, Gaowei M, et al (2020) Revisiting heat treatment and surface activation of GaAs photocathodes: In situ studies using scanning tunneling microscopy and photoelectron spectroscopy. Journal of Applied Physics 128:045308. https://doi.org/10.1063/5.0008969
- Biswas J, Gaowei M, Liu A, et al (2022) Cesium intercalation of graphene: A 2D protective layer on alkali antimonide photocathode. APL Materials 10:111115. https://doi.org/10.1063/5.0122937
- Rahman O, Wang E, Ben-Zvi I, et al (2019) Increasing charge lifetime in dc polarized electron guns by offsetting the anode. Physical Review Accelerators and Beams 22:. https://doi.org/10.1103/physrevaccelbeams.22.083401
- Wang E, Litvinenko VN, Pinayev I, et al (2021) Long lifetime of bialkali photocathodes operating in high gradient superconducting radio frequency gun. Scientific Reports 11:. https://doi.org/10.1038/s41598-021-83997-1
- Wang E, Rahman O, Skaritka J, et al (2022) High voltage dc gun for high intensity polarized electron source. Physical Review Accelerators and Beams 25:. https://doi.org/10.1103/physrevaccelbeams.25.033401
- Biswas J, Rahman O, Wang E (2019) Study of Photocathode Surface Damage due to Ion Back-Bombardment in High Current DC Gun. Proceedings of the North American Particle Accelerator Conference NAPAC2019:USA. https://doi.org/10.18429/JACOW-NAPAC2019-MOPLH02
Brookhaven National Laboratory
Electron-Ion Collider
Bldg. 911C, Room A331
P.O. Box 5000
Upton, NY 11973-5000
(614) 370-4101
jbiswas@bnl.gov
