Prabir Roy, Ph.D.

+1-510-***-**** ab95rx@r.postjobfree.com

U.S. citizenship

http://www.linkedin.com/pub/prabir-roy/4a/41a/369/

Summary Objective: Research Scientist Sr

Extensive research and development experience in experimental physics related to keV - MeV energy

range linear accelerators. Designed and developed charged particle sources, beam transport systems,

electron and ion diagnostics (including imaging system, fast response and short pulsed optical, electri-

cal, impulses), high-dense plasma sources, pulsed tube, and various types of beam quality test equip-

ments. Additional experience on injector development and beam transport modeling, experimental

statistical data collection (using Labview), data analysis (using computer software MS excel, python,

Math-Cad), including comparing experimental data to theoretical models. Published more than 15

peer reviewed principal author articles on the ield. Ability to work on a team or independently.

Professional Experience

Lawrence Berkeley National Laboratory, Berkeley, CA 2002-2013

Sr. Scienti ic Associate (2006-2013)

Physicist Scientist (2004-2006)

Postdoc Physicist (2002-2002)

• Formulated designs (including proto-type), development, and characterization of lithium alumino-

silicate ion sources, investigated the lifetime of the sources, neutral atom loss at variation of duty

factor, temperature and Voltage. [Roy et al., Review of Sci. Instrum., 82 (2011) 013304.]

-- Provided source design parameters of a 11M US$ ARRA funded induction accelerator project

at LBNL; have potentiality to use the source as a tool for plasma diagnostics.

• Conducted an experiment and demonstrated result on intense beam compression for warm dense

matter study; 400 times radial compression and 50 times temporal compression demonstrated

for intense beam focusing. [Roy et al., Phy. Rev. Letters, 95 (2005) 234801.]

-- The article cited internationally for more than 100 times.

• Conducted experiments and validated irst beam dynamics experimental result of a Pulse Line

Ion Accelerator (PLIA). [Roy et al., Phy. Rev. STABeams, 9 (2006) 070402.]

-- A cost effective low energy Helix type particle accelerator.

• Designed, developed and demonstrated a novel method of non perturbing ion-beam diagnostic

using a non-intense electron beam. [Roy et al., Rev. of Sci. Instrum., 76 (2005) 023301.]

-- A technological contribution, later conceived by other laboratories in the USA, UK, China, Ger-

many for non-perturbing energetic beam measurements.

• Designed, and developed a prototype plasma probe and characterize a high dense plasma distri-

bution in an intense magnetic iled.[Roy et al., Nucl. Instrum. Meth. Phys. Res. A606 (2009) 22.]

-- A characterization of magnetic mirror affect, demonstrated intense plasma channel formation.

• Performed superconducting magnets quality assurance (QA), ionized radiation detection sys-

tems design, in addition to several other projects.

Center for Applied Physics studies, Louisiana Tech Univ., Ruston, LA 2001-2002

Postdoc Physicist

Tested, debugged and installation Inter-Cryostat-Detector (ICD) electronic drawers assembly

with cosmic ray test (using photo multiplier tubes and its associated electronics) for Fermi-National

Laboratory D-zero Run II project. Also, contributed to build up charge exits detectors (CEDs)

foam box structure to hold CED plates for a scattering experiment for the Jefferson laboratory

G-zero projects.

--A major accomplishment of an institutional responsibility on schedule for international collab-

oration. Co-authored of several PRL papers.

Omachron Science Inc., Hampton, Ontario, Canada 1998-2001

Research Scientist

• Introduced non neutral plasma and a quicker heat transfer in an arti icial space environment.

--The system proved that electrons (due to faster mobility) in the plasma could be used in a vac-

uum to enhance or reduce heat transfer between two objects (part of a US Patent).

• Identi ied a new process making liquid metal droplets or metal powder of micron size by design-

ing an electrostatic atomization technique.

--Results used for a US patent by Canadian and US companies.

• Utilized an electrical discharge in a desk-sized plasma reactor with combustion NOx exhaust be-

ing dissociated.

-- Results used for a US patent by Canadian and US companies.

Previous Relevant Experience

Institute of Laser Engineering (ILE), Osaka Univ., Osaka, Japan

• A laser heated electron gun was design and developed to eliminate the magnetic ields at the

cathode surface.[P. K. Roy et al., Rev. Sci. Instrum., 67(12)(1996)4098].

The laser heating mitigated emittance dilution and are all but unavoidable when ohmic or beam

heating is used.

• A multistage electron collector was designed using the EGUN code and developed for an electron

beam energy recovery system. [P. K. Roy et al., Rev. Sci. Instrum., 68 (12)(1997) 4404.]

--The collector was ef icient to control the escaping of the primary trajectories and secondary

electrons.

• A higher ef icient electron beam energy recovery system was successfully demonstrated. [P. K. Roy

et al., Japanese J. of Applied Phys., 38I (1999) 279.]

--Accomplishment of a scienti ic validation experiment for industrial and scienti ic applications.

Education

Ph. D., Electromagnetic Energy Engineering, ILE, Osaka University, Japan, 1998

Master of Science (M. Sc.), Physics, University of Chittagong, Bangladesh, 1987

Bachelor of Science (B.Sc.) (Hons.), Physics, University of Chittagong, Bangladesh, 1986

Training

Thesis 1 title: Experimental Study on an Electron Beam Energy Recovery System for Free Electron Lasers,

Osaka University, 1995-1998.

Thesis 2 title: Measurement of gamma radioactivity in soil using HPGe detector, at RTL, BGD Atomic

Energy Commission, 1987-1989.

Beam Physics with Intense Space Charge, US Particle Accelerator School (4 graduate course credits of

Boston University, Massachusetts, USA) June 12-23 (2006).

`Technical writing', Univ. of California Berkeley extension, UC Berkeley, USA (2004).

C++, Durham College, Oshawa, Canada (2000).

2 / Roy

Association Membership

APS (1995--current) MD, USA

IEEE (1999--current) NY, USA

AAAS (2008--current) DC, USA

Communication skill

English (Orally and written: luent)

Japanese (Orally: luent, written: pro icient)

Bengali (Orally and written: luent)

Presented invited talks: International Heavy Ion Fusion (HIF) Symposium in 2004 (Princeton Univ.),

2006 (France), 2008 (Japan), 2010 (Germany), and 2012 (Berkeley, USA); LINAC 2006 (Tennessee).

Oral contribution talks: APS-DPP, 2005 to 2011, every year.

Poster presentation: PAC 2005 to 2011, every year.

Awards and honors

Spot Recognition Award of Berkeley Lab in 2012 (for source development), and 2013 (for safety).

Award of Excellence by US Defense programs for contribution to the Stockpile Stewardship (2006).

MONBUSHO (Ministry of Education, Japan Government), Japan (Oct.1994-March 1998).

National Science and Technology Fellow, Bangladesh Government (Dec. 1991 -Aug. 1992).

Addendum: Partial list of publications

1. P. K. Roy et al., Lithium ion sources, Nucl.Instrum. Methods Phys. Res.

June, 2013, http://dx.doi.org/10.1016/j.nima.2013.05.086.

2. P. K. Roy et al., Source fabrication and lifetime for Li+ ion beams extracted from alumino-silicate

sources, Rev. Sci. Instrum., 83(4), (2012) 043303-8.

3. P. K. Roy et al., Li+ alumino-silicate ion source development for the Neutralized Drift Compres-

sion Experiment (NDCX), Rev. Sci. Instrum., 82,(2011) 013304-7.

4. P. K. Roy et al., A space-charge-neutralizing plasma for beam drift compression, Nucl.Instrum.

Methods Phys. Res. A606 (2009) 22--30.

5. P. K. Roy et al., Neutralized drift compression experiments with a high-intensity ion beam, Nucl.

Instrum. Methods Phys. Res. A 577 (2007) 223--230.

6. P. K. Roy et al., Energy ampli ication and beam bunching in a pulse line Ion accelerator, Phys. Rev.

STAccel. Beams, 9 (2006) 070402. (LBNL--59896).

7. P. K. Roy et al., Drift compression of an intense neutralized ion beam, Phys. Rev. Lett. 95, (2005),

pp. 234801, (LBNL--58769).

8. P. K. Roy et al., Neutralized transport experiment, Nucl. Instrum. Methods Phys. Res. A 544 (2005)

225--235, (LBNL--55157).

9. P. K. Roy et al., Electron beam diagnostic for space charge measurement of an ion beam, Rev. Sci.

Instrum.76(2) (2005) 023301--8, (LBNL--56392).

10. P. K. Roy et al., Study of non-intercepting ion beam diagnostic for beam density pro ile, Nucl.

Instrum. Methods Phys. Res. A 544 (2005) 520--526.

11. P. K. Roy et al., Results on intense beam focusing and neutralization from the neutralized beam

experiment, Phys. Plasmas, 11(5) (2004) 2890--2898,(LBNL--53974).

12. P. K. Roy et al., Experimental study of electron beam energy recovery system with a laser heated

electron gun and a multistage electron collector for high ef icient beam application, Japanese Jour-

nal of Applied Physics, 38,part-I(1999) 279--285.

3 / Roy

Contact this candidate