TÜRK HIZLANDIRICI MERKEZİ IR SEL TESİSİ DENEY İSTASYONLARI

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1 UPHUK IV 30 Ağustos- 1 Eylül 2010 Bodrum-Muğla TÜRK HIZLANDIRICI MERKEZİ IR SEL TESİSİ DENEY İSTASYONLARI P. ARIKAN*, S. ERDOĞAN**, A. UŞUN**, E. TATOĞLU** *Gazi Üniversitesi, Fen Edebiyat Fakültesi,Fizik Bölümü, Teknikokullar ANKARA, TÜRKİYE **Gazi Üniversitesi, Fen Bilimleri Enstitüsü,Fizik Bölümü, Teknikokullar ANKARA, TÜRKİYE

2 YUUP kapsamında DPT Projesi YUUP: Yaygınlaştırılmış Ulusal ve Uluslararası Proje Ankara Üniversitesi-Koordinatör Boğaziçi Üniversitesi Gazi Üniversitesi Doğuş Üniversitesi İstanbul Üniversitesi Erciyes Üniversitesi Uludağ Üniversitesi Süleyman Demirel Üniversitesi Dumlupınar Universitesi Niğde Üniversitesi

3 Schematic View of TAC IR-FEL & Brems. Facility Klystron, Electronics Room Bremsstrahlung Experiment Area

7 THM TARLA TESİSİ

8 Kızıl Ötesi Bölge Yakın IR bölgesi: 1-2,5 μm. Titreşim üst ton ve kombinasyon bandlarının bulunduğu bölgedir. Titreşimle ilgili çok fazla bilgi vermez, ancak reaksiyon izlemede kullanılabilir. NIR Orta IR bölgesi: 2,5-50 μm. Bu bölge titreşim spektroskopisinde en yoğun kullanılan bölgedir. Parmak izi bölgesi olarak isimlendirilir. MIR Uzak IR bölgesi: μm. Metal-metal bağı gibi kuvvetli bandlar gözlenebilir. FIR

9 Dünyadaki Bazı IR-SEL Laboratuarları 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 : μm

10 Kızılötesi Serbest Elektron Lazeri (IR-SEL) Genel Kullanım Alanları Biyoteknoloji, Medikal fizik, Malzeme bilimi, Atom ve molekül fiziği, Nanoteknoloji, Yarıiletkenler ve Kuantum Kuyuları Fotokimya Yüzey fiziği ve ara yüzey araştırmaları

11 IR FEL Exp.Stations and User Potential Committee and Working Group Dr. Pervin Arıkan ( Gazi University) Head of Committee Dr.Atilla Aydın ( Bilkent University ) Member of Committee Dr.Arif Demir ( Kocaeli University) Member of Committee Dr.Ayşe Hiçsönmez ( Ankara University) Member of Committee Dr.Hakan Altan ( METU ) Member of Committee Dr. Raşit Turan ( METU) Member of Committee Dr.Ergün Kasap ( Gazi University) Dr.Bukem Bilen (London-UK) Müge Tural Gündoğan ( Ph.D Student - Ankara University) Ayşegül Uşun ( M.Sc. Student Gazi University) Elif Tatoğlu ( M.Sc. Student- Gazi University) Selin Erdoğan ( M.Sc. Student- Gazi University)

12 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

13 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

14 Experimental techniques 1 - Sum Frequency Generation 2 - Photon Echo Experiment 3 - Photoacustic Spectroscopy 4 - Pump-Probe Experiments 5 - IR-MALDI (IR matrix assisted laser desorption/ionization ) 6 - IR-MAPLE ( IR matrix assisted pulsed laser evaporation ) 7 - IR-REMPI (IR resonance enhanced multiphoton ionization) 8 - Near Field Microscopy 9 - Gas-Phase IR Spectroscopy

15 Laboratuvarlarda neler yapılabilir? Fourier Transform Infrared Spectroscopy (FTIR)-Fourier Dönüşüm Kızılötesi Spektroskopisi Time-Resolved FTIR Spektroskopisi Attenuated Total Reflection (ATR)-Azaltılmış Toplam Yansıma Spektroskopisi Infrared Ellipsometry-Kızılötesi Elipsometri Sum Frequency Generation (SFG)-Toplam Frekans Jenerasyonu Metodu Pump Probe-Pompa Sonda Metodu Pulsed Laser Deposition (PLD)- PLD Metodu Annealing- Tavlama

16 16 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 Melt Cutting Reactive Fusion Cutting Ablation Welding Brazing Cladding Alloying Hardening Forming Laser Forming Prototyping Sintering Stereolithograph y

17 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.

18 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 Infrared beam ATR crystal Detector 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 ( 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.

19 Sum Frequency Generation (SFG) Spectroscopy(Selin Erdoğan-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.

20 Pump-Probe Method ( Ayşegül Uşun-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.

21 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.

22 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.

23 We identified areas of interest and contacted spesific researchers. First User Meeting 50 scientists Ankara University

25 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

26 Second User Meeting Chemistry,Biology,Medicine (25 scientist) Ankara University

28 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

29 Working groups for experimental stations Diagnostics ( Lab.1) İlhan Tapan(Head)+Ömer İlday+Ramiz Hamit IR Spect. (General IR Appl.) ( Lab 2) Atilla Aydınlı(Head)+Raşit Turan+Arif Demir+E.Tatoğlu SFG and PPT ( Non-linear Optical Lab.) ( Lab 3) Hakan Altan (Head)+Ayhan Elmalı+ Okan Esentürk+A.Uşun +S.Erdoğan

30 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?

31 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, )

32 THM projesinde görevli iken, tarihinde Isparta daki uçak kazasında kaybettiğimiz Bilim Şehitlerimizi Saygıyla ve rahmetle anıyoruz

33 Thank you for your attention

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