PROFESSIONAL EXPERIENCE:

Confidential

Responsibilities:

• Lead design, fabrication and testing (electrical, hydraulic/ pneumatic, quality test, and field mapping) of room - temperature magnet for reaccelerator project (ReA) and other sub-projects.
• Room-temperature magnets includes dipoles, quadrupoles, sextupoles, solenoids and combined function corrector magnets (in operation).
• Design room-temperature (RT) magnets for Facility for Rare Isotope Beams (FRIB) driver linear accelerator. Magnets were built outside based on in-house design.
• Around 240 magnets are needed, includes dipole, quadrupole, solenoids, corrector magnet.
• Experience of design, fabrication and testing of large aperture high field superconducting magnets such as:
• Superferric cyclotron gas-stopper magnet (2.7 T, 0.18 m min-gap, in operation).
• Superferric Horizontal Bend (HB) dipole magnet for Confidential 11 Gev upgrade (2.75 T, 0.34 m gap, magnet in operation).
• Superferric High field (2.5 T), large aperture (0.5 m) cold iron quadrupole triplets for the vertical section of the FRIB fragment separator (9 out of 12 of them were tested successfully).
• Superferric High field (2.5 T), large aperture (~0.6 m) warm iron quadrupole singlets after production target. Total five magnets are required and there are two different designs. Recently tested quad in the dewar meets field requirements.
• Superferric High field (2.0 T) and large gap (0.2 m) 30o and 50o dipole for FRIB fragment separator (coil and return yoke fabrication for 50o dipole is complete, procurement of large size conductor for 30o is complete, pole/return yoke fabrication in progress). Total four magnets are needed.
• Compact superferric 45o dipole (four magnets for 180-degree bend) design for folding section-2 of the FRIB Linac (fabrication in progress). That helps in the optimization of tunnel size and reduces the cost of the overall project.
• Magnetic Shield Design for ReA and FRIB Cryomodules. SRF cavities are sensitive magnetic field (as low as 15 mG). Out of various practical options two options were considered in detail. A). global shielding, B). local shielding. The advantage of the global shielding is, both design and assembly is straightforward whereas disadvantage is high cost, non-magnetic parts are required for assembly and the complications involved with demagnetization cycle. In the case of local shielding, the advantage is design based on earlier experience (ReA cryomodule in operation), no need of demagnetization cycle or any special parts such as non-magnetic material for assembly and is cheaper compare to global shielding. The cost saving of around 7.5 million dollars for FRIB project.
• Multi-Physics Simulation for Superconducting magnets that includes stress in the helium vessel, superconducting coil, eddy current impact in the thermal shield due to charging and discharging of the magnet.
• Superconducting wire specification and procurement (worked with purchasing dept.) of worth around one million dollars.
• Worked in acquiring around 40 corrector magnet from Berkeley Lab for FRIB linear accelerator that is more than 500 thousand dollar worth of saving for FRIB project.
• Design of large aperture (1.3 m diameter) and High field (2.5 T, pole tip) quadrupole magnets for High Rigidity Spectrometer (HRS) under design at Confidential .
• Preliminary design of large gap (0.7 m) and high field (2 T) dipole for High Rigidity Spectrometer (HRS) under design at Confidential .
• Proposed, presented (oral, International Conference on Magnet Technology, 2013, Boston U.S.A) and published new concept for hexapole-octupole combined function magnet.
• SC-Magnet design for extremely high radiation environment via CICC (cable in conduit) coils and materials for high radiation environment (such as polyimide insulation, cyanate ester epoxy, aluminized Kapton MLI, PEEK). CICC (cable in conduit) coils stability analysis using GANDALF code.
• Design, development and testing of SC solenoid.
• Lead testing of room-temperature magnet (around 25) for SECAR project. Provide design information of combined function (CF) quadrupole-hexapole magnet to project manager/ vendor. Fabricated CF magnet meets design requirements.
• Design and development of RT (resistive mineral insulated conductor) magnets for high radiation environment.
• Refurbish 50-year-old DANBY quadrupoles and hexapole to reduce the cost of the beam line magnets needed for ReA project. Magnets are in operation.

Research Associate

Confidential, NY

Responsibilities:

• Work in the field of permanent magnet/ hybrid insertion device for synchrotron light source. Participate in the design and analyses of measured field data of X-25 beamline in-vacuum hybrid undulator.
• Contribute in the magnetic measurement System for the NSLS Superconducting Undulator Vertical Test Facility. Design, fabricate and testing of Helmholtz coils for an insitu calibration of Hall-probe during cold measurement.
• Design, fabricate and later participate in the measurement of superconducting undulator proto-type.
• Proposed, presented (oral, Particle Accelerator Conference, 2005, Knoxville, TN, U.S.A) and published new concept for variable polarized superconducting undulator and later proposed Fig-8 SC undulator design.
• Gradient dipole and compact HTS magnet design.

Post-Doctoral Fellow

Confidential

Responsibilities:

• Contribute in the field of vertical field mini-gap undulator magnet design, perform data analysis of full length device for Confidential light source.
• Worked on optimization of emitted spectrum of a superconductive undulator by correction coils and preparation for a storage ring test in Confidential
• Worked on Effect of auxiliary undulator magnetic field on the spectral properties of two-harmonic undulator radiation at zero-angle.
• Contribute in the field of various possible options of dual-helical undulator magnet design.

Research Associate

Confidential

Responsibilities:

• The first employment beyond graduate school was a post doctorate position in the field of design and development of undulator magnets for Free Electron Laser ( Confidential ) application.
• The stay was about ~ 4 months and during this brief period the gyro-device brightness is further extended to analyse effects of induced oscillations.
• The analytic expressions and the results with relevant physical consequences were published for a comparison with the linear undulator field, a device proposed for gain enhancement and generation of harmonics in free-electron lasers.