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UPHUK IV

30 Austos- 1 Eylül 2010

Bodrum-Mula

TÜRK HIZLANDIRICI MERKEZ IR SEL TESS DENEY STASYONLARI

P. ARIKAN*, S . ERDOAN**, A . UUN**, E . TATOLU**

*Gazi Üniversitesi, Fen Edebiyat Fakültesi ,Fizik Bölümü, 06500 Teknikokullar ANKARA, TÜRKYE **Gazi Üniversitesi, Fen Bilimleri Enstitüsü ,Fizik Bölümü, 06500 Teknikokullar ANKARA, TÜRKYE

YUUP kapsaminda DPT Projesi YUUP: Yayginlatirilmi Ulusal ve Uluslararasi Proje

Ankara Üniversitesi-Koordinatör

Boaziçi Üniversitesi Dou Üniversitesi

Gazi Üniversitesi

stanbul Üniversitesi

Erciyes Üniversitesi

Uluda Üniversitesi

Süleyman Demirel Üniversitesi

Dumlupinar Universitesi

Nide Üniversitesi

Schematic View of TAC IR-FEL & Brems. Facility

Klystron, Electronics Room Bremsstrahlung Experiment Area

THM TARLA TESS

Kizil Ötesi Bölge

Yakin IR bölgesi: 1- 2,5 m. Titreim üst ton ve kombinasyon bandlarinin bulunduu bölgedir. Titreimle ilgili çok fazla bilgi vermez, ancak reaksiyon

izlemede kullanilabilir. NIR

Orta IR bölgesi: 2,5- 50 m. Bu bölge titreim spektroskopisinde en youn kullanilan bölgedir. Parmak izi bölgesi olarak isimlendirilir. MIR Uzak IR bölgesi: 50-1000 m. Metal-metal bai gibi kuvvetli bandlar gözlenebilir. FIR

Dünyadaki Bazi IR-SEL Laboratuarlari

LURE CLIO (Orsay, France) ELBE (Dresden, Germany) iFEL (Osaka, Japan) FOM FELIX (Holland) Jefferson FEL (USA) JAERI (Japan) FEL-SUT (Tokyo, Japan) LANL AFEL (Los Alamos, USA) SDALINAC IR-FEL (Darmstadt) SCA-FEL (Stanford, USA) IHEP Beijing FEL (China) ISIR FEL (Osaka, Japan) Duke MK III (Duke, USA) THM IR SEL

: 2.5 -250 m

Kizilötesi Serbest Elektron Lazeri (IR-SEL) Genel Kullanim Alanlari

Biyoteknoloji, Medikal fizik, Malzeme bilimi,

Atom ve molekül fizii,

Nanoteknoloji, Yariiletkenler ve Kuantum Kuyulari Fotokimya Yüzey fizii ve ara yüzey aratirmalari

IR FEL Exp.Stations and User Potential Committee and Working Group

Dr. Pervin Arikan ( Gazi University) Head of Committee Dr.Atilla Aydin ( Bilkent University ) Member of Committee Dr.Arif Demir ( Kocaeli University) Member of Committee Dr.Aye Hiçsönmez ( Ankara University) Member of Committee Dr.Hakan Altan ( METU ) Member of Committee Dr. Rait Turan ( METU) Member of Committee Dr.Ergün Kasap ( Gazi University) Dr.Bukem Bilen (London-UK) Müge Tural Gündoan ( Ph.D Student - Ankara University) Ayegül Uun ( M.Sc. Student ­ Gazi University) Elif Tatolu ( M.Sc. Student- Gazi University) Selin Erdoan ( M.Sc. Student- Gazi University)

Plans for Exp. Stations

Considering the tunability, high power and short pulse structure of the FEL, we propose to use IR FEL in following research areas at 8 experimental stations:

1 Photon diagnostic room 7 Experimental stations

Planning for exp. stations

Exp. Station No 1: Photon (FEL) Diagnostics Exp. Station No 2: General IR FEL Spectroscopy (vibrational and rotational IR spectroscopy for solid, gases and liquid materials) FTIR spectroscopy, Raman spectroscopy Exp. Station No 3: IR FEL Spectroscopy and microscopy for material science and semiconductors SFG & Pump probe techniques Exp. Stations 4-8: These four stations will be planned to use existing FEL after completion of two FEL lines to use in non-linear optics, nanotechnology, photochemistry and biotechnological reserach

1 2 3 4 5 6 7 8 9

Experimental techniques - Sum Frequency Generation - Photon Echo Experiment - Photoacustic Spectroscopy - Pump-Probe Experiments - IR-MALDI (IR matrix assisted laser desorption/ionization ) - IR-MAPLE ( IR matrix assisted pulsed laser evaporation ) - IR-REMPI (IR resonance enhanced multiphoton ionization) - Near Field Microscopy - Gas-Phase IR Spectroscopy

Laboratuvarlarda neler yapilabilir?

Fourier Transform Infrared Spectroscopy (FTIR)-Fourier Dönüüm Kizilötesi Spektroskopisi

Time-Resolved FTIR Spektroskopisi Attenuated Total Reflection (ATR)-Azaltilmi Toplam Yansima Spektroskopisi

· · · · ·

Infrared Ellipsometry-Kizilötesi Elipsometri

Sum Frequency Generation (SFG)-Toplam Frekans Jenerasyonu Metodu Pump Probe-Pompa Sonda Metodu Pulsed Laser Deposition (PLD)- PLD Metodu Annealing- Tavlama

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Processes

With increased laser power and beam quality more and more application fields were developed and meanwhile laser processes can be found in nearly all production areas and branches .

LASER MATERIALS PROCESSING

Cutting Joining Surface Treatment Forming Prototyping

Melt Cutting Reactive Fusion Cutting Ablation

Welding Brazing

Cladding Alloying Hardening

Laser Forming

Sintering Stereolithograph y

What information can FTIR provide?

It can identify unknown materials. It can determine the quality and consistency of a sample. It can determine the amounts of components in a mixture.

Attenuated Total Reflection (ATR)

When the sample is in a liquid or solid form the intensity of the spectral lines is determined by the thickness of the sample and typically this sample thickness cannot be more than a few tens of microns. Attenuated total reflection (ATR) technique is the best sampling technique providing excellent quality data even for thick samples.

Sample

Detector Infrared beam

ATR crystal

· The sample must be in direct contact with the ATR crystal and the refractive index of the ·

ATR crystal (ZnSe and Ge) must be greater (2.38-4.01 at 300nm) than that of the sample for internal reflection. The advantage of using IR-FEL in FTIR is the increased intensity compared to blackbody sources.

Sum Frequency Generation (SFG) Spectroscopy(Selin Erdoan-poster)

Sum Frequency Generation (SFG) is a nonlinear optical technique used to study the details of molecular structure and dynamics at surfaces and interfaces. SFG

has advantages in its ability to be monolayer surface sensitive, ability to be performed in situ (for example aqueous surfaces and in gases), and not causing much damage to the sample surface. This spectroscopy method utilizes SFG, where two light beams mix at a surface and generate an output beam with a frequency equal to the sum of the two input frequencies. the composition, orientation distributions, and some structural information of molecules on a surface.

Pump-Probe Method ( Ayegül Uun-poster )

Pump-probe method enables to follow in real time vibrational motions coupled to electronic transitions. The sample is excited by one pulse train (pump) and the changes it induces in the sample are probed by the second pulse train (probe), which is suitably delayed with respect to the pump. Changes in the order of picosecond can be observed with this method.

Pulsed Laser Deposition (PLD)

Thin films of materials can be grown

with PLD method. Pulsed laser is focussed on the material and under high vacuum the material is grown as a thin film on a substrate. In other methods like chemical vapor deposition (CVD) and molecular beam epitaxy (MBE) the material is heated and evaporated. Some materials like polymers are degraded, therefore, PLD method is preferred over the other methods.

Annealing

Annealing is heating a material to a predetermined temperature, holding for a certain time, and then cooling to room temperature to change its physical properties like hardness or optical properties. Usually ovens are used for this kind of treatment. IR FEL is also useful and many researchers use IR FEL instead of an oven.

· In this study, the formation of gold nanoparticles are observed under IR light. Cluster size was 2.4nm before IR light. It has become 6.5nm after illumination and the density was reduced which was the opposite of the condition after conventional annealing.

We identified areas of interest and contacted spesific researchers.

First User Meeting

50 scientists 06.06.2009

Ankara University

Few areas of interest Conventional Laser ve IR FEL Non-linear optics Pump-probe Techniques Sum frequency generation FTIR , Raman Spect. Optics and signal process Terahertz Spect. Nanotechnology Material Science Semi-conductors

Second User Meeting

Chemistry,Biology,Medicine (25 scientist) 15.05.2010

Ankara University

· Material Characterization

Infrared Spectroscopy FTIR MALDI MS ATR FTIR Elipsometry Laser Chemistry Molecular spectroscopy Nanotechnology Laser desorption IR Imaging Laser ablation Nanomedicine THz Spectroscopy PPT SFG

Working groups for experimental stations

Diagnostics ( Lab.1) lhan Tapan(Head)+Ömer lday+Ramiz Hamit IR Spect. (General IR Appl.) ( Lab 2) Atilla Aydinli(Head)+Rait Turan+Arif Demir+E.Tatolu SFG and PPT ( Non-linear Optical Lab.) ( Lab 3) Hakan Altan (Head)+Ayhan Elmali+ Okan Esentürk+A.Uun +S.Erdoan

Under discussion

Lab 4 Material processing (Dr.Arif Demir) ? Lab 5 THz. Spectroscopy (Dr.Hakan Altan) ? Lab 6 Chemistry ? Lab 7 and Lab 8 for biology and medicine ?

ROAD MAP

Experimental stations of TARLA Facility

Manpower ( new comers and young scientist) Practical experience and academic study Determine USER PROFILE for TURKEY ROUND TABLE (physics+chemistry+biology ) 2010 USER MEETING ( Industry , Private company) 2010 Project Proposals from users Planning of 3 Experimental Stations +2 Exp.stations. in details (design,budget,equipment,...) 2010-2011

THM projesinde görevli iken , 30.11.2007 tarihinde Isparta'daki uçak kazasinda kaybettiimiz

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