Research Scientist and Group Leader of SUSNAG and LMIG (CMUXE-PURDUE)

In charge of seven state-of-the-art in- and ex-situ UHV and Laser laboratories

Interaction of Materials with Particles and Components Testing (IMPACT)

Ultra High Flux Irradiation (UHFI)

Particle Radiation Interaction with Matter Experiments (PRIME)

Laser-Produced Plasma Research (LPP)

High Energy Density Plasma (HEDP)

Discharged Produced Plasmas (DPP)

Cold Atmospheric Plasma (CAP)

Director of Facilities: Prof. Ahmed Hassanein

Facilities Designed & Developed

[Ultra High Flux Irradiation (UHFI)]

Multifunctional state-of-the-art ex-situ single ion beam irradiation (SIBI) in extreme condition

Broad-beam, low-energy, high-flux ion source gun [both, in horizontally and vertical orientations]

X, Y, and Z moment of sample

Direct mounting of sample on heater

K-type thermocouple & High sensitive Pyrometer for temp. measurement

Thermal-feedback mechanism in sample heater for correcting simultaneously the ion-induced heating of samples during experiment.

This Thermal-feedback is achieved by altering the current supplied to the heating element based on the difference between current and desired sample temperatures.

in-situ and simultaneous, Dual Ion Beam Irradiation (DIBI), Transient and Steady-state Heat loading: Major thrusts research

nearly IDEAL Nuclear Fusion Environment @ at Laboratory Scale!

Single Ion Beam Irradiation (SIBI), Transient, and Steady State Heat loading

Dual Ion Beam Irradiation (DIBI), Transient, and Steady State Heat loading

Transient and Steady State Heat loading in ELMs Condition

Eroded mass measurement via. high sensitive QCM and witness plate

Ability to design and perform other critical surface science expt. (if required)

Major Component:

Specially designed cylindrical UHV chamber containing several view ports (eight 6” and eight 2 ¾ ″ (horizontal orientation), eight 2 ¾ ″ (vertically shifted horizontal plane), and one 4 ½” (45º from vertical)), all the view ports are centered to the “supercenter” of the UHV chamber.

Separate fast entry load lock in the top of the UHV chamber.

Two broad beam ion source gun

GSI Lumonics Nd : YAG laser (1064 nm, 1 Hz , 1 ± 0.1 ms pulse width).

Miyachi America Corp.; LW25A laser (1064 nm, 25 W power, 0.2-10 ms, 1-30 Hz, ~ 3 mm beam dia. Flat-top spatially and temporally and beam shape).

Heat load during these transient events is expected in the range of 0.2 - 2.0 MJ m−2 in normal ITER tokamak conditions, with a duration of 0.1 - 1 ms.

K type thermocouple and Highly sensitive Pyrometer @two color sensor

Fast-gated ICCD camera for recording the wavelength dispersed signal. Imaging of laser ablation plumes is accomplished using an ICCD.

QCM (quartz crystal microbalance) for ablated mass measurement

Thermal Desorption Spectroscopy (TDS)

Ramping of surface temperature and simultaneous measurement of the intensity of the desorbed particles via. residual gas analyzer (RGA)

Larger desorption temp. >> larger binding strength

Larger TDS Peak area >> larger the coverage

Detailed analysis of TDS spectra >> information about the heat adsorption, pre-exponential factor, desorption order, evidence for different adsorption sites on the surface, and many more.

Pulsed Laser Deposition (PLD) Epitaxial Ultra-thin Film & Multilayers

ns “Q-Smart 450” laser (1064 nm (450 mJ), 532 nm (220 mJ), 355 nm (130 mJ); 10Hz, 5 ns)

2-inch diameter target with precise controlled rotation capability

2-inch programmable substrate heater (compatible with O2 up to 1 atmosphere) where substrate can be mounted directly. Heater is fully programable & mounted on XYZ movable manipulator

Substrate temperature ≤ 1223K

K type thermocouple and Highly sensitive Pyrometer @two color sensor

Fast-gated ICCD camera for recording the wavelength dispersed signal. Imaging of laser ablation plumes is accomplished using an ICCD.

QCM (quartz crystal microbalance) for ablated mass measurement

LEED & RHEED (to be installed)

RF sputter and ion beam assisted deposition

Equipped with two sputter deposition guns at 45º from substrate normal.

Additional Mantis sputter ion gun installed (in substrate normal direction)

For achieving simultaneous sputtering from substrate. The specific design (convergence of all 3 ion source guns on a single point, supercenter) allows us to perform ion beam assisted deposition (IBAD).

IMPACT (Interaction of Materials with Particles & Components Testing)

IMPACT (Interaction of Materials with Particles and Components Testing) experimental facility

IMPACT facility have been designed to study in-situ dynamic heterogeneous surfaces at the nano-scale exposed to varied environments that modify surface and interface properties. These facilities are used to investigate to investigate radiation-induced modification of materials and surfaces with applications to fusion science, nanotechnology and detector development.The philosophy behind experiments in IMPACT/PRIME relies heavily on its ability to provide a wide array of characterization techniques and conditions that properly simulate complex environments. The IMPACT/PRIME experiment achieves this by atomic-scale characterization of the evolution of elemental, chemical, and thermodynamic states of ultra-thin film surface and interfaces using complementary surface-sensitive characterization techniques.

In-situ techniques used in IMPACT

4 pocket e-beam Evaporator for thin film and multilayer deposition

QCM (quartz crystal microbalance) for thickness measurement

Dynamic X-ray Photoelectron Spectroscopy (XPS)

Dynamic Auger Electron Spectroscopy (AES)

EUV(13.5-nm) Photoelectron Spectroscopy (EUPS)

Ultraviolet Photoelectron Spectroscopy (UPS)

EUV reflectometry (EUVR)

Low-Energy Ion Scattering Spectroscopy (LEISS)

Direct Recoil Spectroscopy

Mass Spectrometry

Secondary Electron Spectroscopy (SES)

IMPACT facility

Ultrahigh vacuum chambers

Inert gas ion sources

4 pocket E-beam evaporator

Dual anode X-ray source (Specs GmbH, Model XR50)

EUV source (13.5 nm, Phoenix Model sem20)

Electron gun

Faraday cups

Hemispherical Electrostatic Analyzers (Specs, Omicron)

Quartz crystal microbalances (QCM)

Highly sensitive Pyrometer @two color sensor

Residual gas analyzers

EUV Photodiodes

Effusion cell

Scanning electron Microscope with EDX

Particle Radiation Interaction with Matter Experiments (PRIME) facility

in-situ ion irradiation, XPS, UPS, and TDS (planned)