Overview of Tandem Accelerator Facility and related RD

Overview of Tandem Accelerator Facility and related R&D Work at NCP Ishaq Ahmad ishaq@ncp. edu. pk http: //www. ncp. edu. pk/taf. php 19 -11 -2015

Contents 1. Aims & objectives 2. Overview of 5 MV Pelletron Tandem Accelerator 3. Research Activities and collaboration 4. Conclusion

Aims and Objectives of Accelerator Lab To extend state of the art ion beam facility to the international/national researchers to use the milli, micro and nanometer size beams of different ions and enhance the understanding of experimental knowledge of ion matter interaction.

An Overview of 5 MV Pelletron Tandem Accelerator • 5 MV Terminal Voltage • Dual Ion Sources – SNICS ( Source of Negative Ions by Cesium Sputtering) for wide range of light and heavy ions generation – RF source for He ion generation • Ions Energies – 10 Me. V for Protons, 15 Me. V for He++ – Useful currents for heavy ions to over 50 Me. V • Two beamlines - 15 degree beamline for Materials Analysis/materials modifications - 30 degree beamline for Ion Scattering/Nuclear Physics

An Overview of 5 MV Pelletron Tandem Accelerator Two Beamlines Spare Beamline Ports

An Overview of 5 MV Pelletron Tandem Accelerator

An Overview of 5 MV Pelletron Tandem Accelerator Two Ions sources

Control Room

Research Activities and Collaboration Ion beam analysis (RBS, PIXE, NRA, ERDA, PIGE and ion channeling ) • Facilitate researchers from different national Universities and institutes to analysis their samples (environment, thin film, single crystal, bulk, biological, samples) • We can facilitate you to analyze your samples Because we have experts to use different Data analysis software like XRUMP, SIMNRA, GUPIX, Data. Furnace to analyze samples. Publications: 17 publications in recent year (2015). IF: >30 20 nm 30 nm Depth Profiling Thin film

Analysis of Multilayer Thin Films Elemental composition and depth profiling of individual elements of multilayer thin films Thin film diffusion study v Thin film Mixing impurity distribution Bulk materials elemental analysis Individual Film thickness Nature and the composition of the interfaces

Single crystal wafers and epitaxial single crystal thin films Ion Channeling Techniques • Providing crystallographic information on radiation damages, crystal defects, impurity location in single crystals and strains in superlattice structures/quantum dotes.

Ion Channeling Techniques Ishaq et al. Journal of Magnetism and Magnetic Materials 324 (2012) 797– 801

Research Activities and Collaboration • Scattering cross section measurement Measurements of differential scattering cross sections of protons at Me. V energies on solid targets Measurements of differential scattering cross sections of heavy ions at Me. V energies on solid targets Publication: 1. Differential elastic scattering cross sections of protons from Al in the 2. 4 – 4. 8 Me. V energy range. Nuclear Science and Techniques. Accepted 2. Experimental study of proton scattering on carbon. Nucl Instr Method B, 2011, 269: 20322034 • Stopping power measurement using low energy light/heavy ions Recently we started this work with the collaboration of Physics department, University of Algiers, Algeria.

Research Activities and Collaboration • Ion beam induced phase separation/segregation of alloys/compounds Ion source as heating source Ion beam induced splitting of XRD and Raman peaks in In. Ga. N/Ga. N epilayer system Collaborative research work with i. Themba LABS South Africa

Research Activities and Collaboration • Ion beam induced mass transport into substrate Collaborative research work with i. Themba LABS South Africa Au nanoparticles on Si substrate. Xiao-Yan Zeng et al applied physics letter 2013

Ion beam induced mass transport into substrate Ag-NWs on Glass substrate Ag-NWs on Si substrate

Research Activities and Collaboration Phase transformation of nanowires/nanotubes/nanoparticles/thin films Collaborative research work with SINAP and University of South Africa Low energy ion implantation is matured for no of decays. After implantation need annealing. High energy ion implantation: Two effects 1. Ions implantation and 2. ion beam induced local heating

Phase Transformation of MWCNTs by Ion Beam Irradiation

MWCNTs to Amorphous nanowires Ishaq et al, Materials Letters (20013)

Phase Transformation of BNNTs to BCNNTs by Carbon Ion Beam Irradiation Nuclear reaction analysis of BNNTs Ishaq et al, J Nanopart Res (2014)

Research Activities and Collaboration Nanowelding of nanotubes/nanowires for fabrication/integration of future nanaodevices • Highly conductive, tranaparent metal nanowires electrodes for different applications • Surface-Enhanced Raman Spectroscopy (SERS) active substrates based on Silver nanowire networks fabricated by ion beam irradiation Collaborative research work with SINAP and University of South Africa

Enhance electrical Conductivity The enhanced conductivity of carbon nanotube network by ion beam irradiation at high temperature Ar+ H+ Ishaq, Yan Long et al Carbon. 2011

Ion Beam induced welding and their networks

Enhance electrical Conductivity Ishaq et al, Current Applied Physics, 2015

Phase Transformation of Zn. O NWs by Ion Beam Irradiation 5 1015 protons/cm 2 1 1017 protons/cm 2 XRD patterns of Carbon irradiated Zn. O nanowires a) As grown Zn. O nanowires, b) 1× 1012 ions cm-2, c) 1× 1014 ions cm-2, and d) 1× 1015 ions cm-2 Ishaq et al, J Nanopart Res (2013)

Research Activities and Collaboration • Cluster ion generation and acceleration • Ion beam synthesis of nanomaterials

National Center for Physics

National Center for Physics

Quaid-i-Azam University

Conclusion • • Promote international research activities. Facilitate to exchanges lab facilities Promote collaboration between research institutes Networking, closeness and personal relations are crucial to promote research activities

Thank you very much for your attention ?