The TAC IR FEL oscillator facility project

Bilen, Bükem (Dogus Author) -- Full conference title: 31st International Free Electron Laser Conference (FEL 2009), 23-28 Aug 2009. Liverpool, United Kingdom.The TAC (Turkish Accelerator Center) IR FEL Oscillator facility, which has been supported by Turkish State Planning Organization (SPO) since 2006, will be based on a 15-40 MeV electron linac accompanying two different undulators with 2.5 cm and 9 cm periods in order to obtain IR FEL ranging between 2-250 microns. The electron linac will consist of two sequenced modules, each housing two 9-cell superconducting TESLA cavities for cw operation. It is planned that the TAC IR FEL facility will be completed in 2012 at Gölbasi campus of Ankara University. This facility will give an opportunity to the scientists and industry to use FEL in research and development in Turkey and our region. In this study, the results of optimization studies and present plans about construction process of the facility are presented

Final structure & design parameters of TARLA RF system

Doğan, Mehmet Sinan (Dogus Author) -- Conference full title: 5th International Particle Accelerator Conference, IPAC 2014; International Congress Center DresdenDresden; Germany; 15 June 2014 through 20 June 2014Turkish Accelerator and Radiation Laboratory in Ankara (TARLA) is an oscillator mode IR-FEL facility which is under construction since 2011. ELBE licensed superconducting modules housing TESLA RF cavities have been manufacturing for one year and the first module will be delivered in 2015. He Cryogenic System has also started to be manufacturing at similar time with the accelerator structures. It will be delivered in 2014. High Power RF amplifiers are started to tender procedures and delivery time is planning as 2015. The installation of high power transmission lines have to be completed at the same time with the delivery date of HPRF amplifiers to test the cavities and amplifiers. In this study, the final structural design of high power RF transmission lines and design parameters of RF amplifiers for TARLA is discussed

Mechanics of milling 48-2-2 gamma titanium aluminide

Accurate and fast prediction of cutting forces is important in high-performance cutting in the aerospace industry. Gamma titanium aluminide (gamma-TiAl) is a material of choice for aerospace and automotive applications due to its superior thermo-mechanical properties. Nevertheless, it is a difficult to machine material. This article presents the prediction of cutting forces for Ti-48Al-2Cr-2Nb (48-2-2) gamma-TiAl in milling process using orthogonal to oblique transformation technique. The novelty of this paper lies in reporting the orthogonal database of 48-2-2 gamma-TiAl. Fundamental cutting parameters such as shear stress, friction angle and shear angle are calculated based on experimental measurements. Friction coefficients are identified for two different coating conditions which are AlTiN, and AlCrN on carbide tools. Predicted results are validated with the experimental cutting forces during end milling and ball-end milling operations for different cutting conditions. The simulated results showed good agreement with the experimental results, which confirms the validity of the force modelWOS:000568177300002Scopus - Affiliation ID: 60105072Science Citation Index ExpandedQ2ArticleUluslararası işbirliği ile yapılan - EVETAğustos2020YÖK - 2019-2

Effects of different doses of nano technological foliar fertilizer and cluster thinning applications on quality characteristics of cv. syarh grape (V. vinifera L.)

Bu araştırma 2018 yılı gelişme döneminde Tekirdağ iline bağlı Karaevli köyünde yer alan özel üretici bağında gerçekleştirilmiştir. Çalışmada 110R anacı üzerine aşılı çift kollu kordon terbiye şekli verilmiş Syrah üzüm çeşidine ait 12 yaşlı asmalar kullanılmıştır. Denemede 4 değişik dozda (0, 750, 1500 ve 2250 ppm) nano teknolojik yaprak gübresi ve salkımlarda %50 oranında seyreltme işlemi uygulanmıştır. Çalışmada değişik dozlarda nano teknolojik yaprak gübresi ve salkım seyreltme uygulamalarının Syrah üzüm çeşidinde tane ve salkımın fiziksel özellikleri ve kalite özellikleri üzerine etkileri incelenmiştir. Yapılan uygulamaların özellikle çeşidin toplam fenolik madde miktarını, toplam antosiyanin miktarını ve antioksidan kapasitesini olumlu etkilediği görülmüştür. Araştırma sonucunda, 1500 ppm NTYG + SS uygulamasının Syrah üzüm çeşidinin tane ve salkım fiziksel özellikleri ile üzüm kalite özellikleri üzerinde önemli etkilerinin olduğu belirlenmiştir.This research was carried out in the private producer vineyard in the village of Karaevli in Tekirdag province in the development period of 2018. In the study, 12-year-old vines belonging to the Syrah grape variety grafted on 110R rootstock were used. In the experiment, 4 different doses (0, 750, 1500 and 2250 ppm) of nano-technological foliar fertilizers and 50% dilution were applied on the clusters. In the study, the effects of different doses of nano-technological foliar fertilizer and cluster thinning on the grape and cluster physical properties and quality characteristics of the Syrah grape variety were investigated. It was seen that applications used in study positively affected total phenolic compounds content, total anthocyanin content and antioxidant capacity of variety, especially. As a result of the research finding, it was determined that 1500 ppm + SSU application had remarkable effects on physical properties of grape and cluster and grape quality characteristics

Beam dynamics simulation for the Compact Linear Collider drive-beam accelerator

In the Compact Linear Collider (CLIC) now being studied at CERN, the rf power which accelerates the main beam is provided by decelerating a high current drive beam. The drive-beam linac has to accelerate a 4.2 A electron beam up to 2.4 GeV in almost fully loaded structures. The pulse contains about 70 000 bunches, one in every second rf bucket, and has a length of 140  μs. The beam stability along the beam line is of concern for such a high current and pulse length. We present different options for the lattice of the linac based on FODO, triplet, and doublet cells and compare the transverse instability for each lattice including the effects of beam jitter, alignment, and beam-based correction

Turkish accelerator center: The status and road map

Copyright © 2014 CC-BY-3.0 and by the respective authors.Turkish Accelerator Center (TAC) Project has started with support of the Ministry of Development (MD) of Turkey under the coordination of Ankara University. TAC is an inter-university collaboration with 12 Turkish Universities. An IR FEL facility (TARLA) based on Sc linac with 15-40 MeV energy under construction in Ankara as the first facility of TAC. It is expected that the TARLA facility will be commissioned in 2017. In addition to the TARLA, it is planned that Turkish Accelerator Center will include a third generation synchrotron radiation facility based on 3 GeV electron synchrotron (TAC SR), a fourth generation SASE FEL facility based on 3 GeV electron linac (TAC SASE FEL), a multi-purpose proton accelerator facility with 3 MeV - 2 GeV beam energy (TAC PAF) and an electron-positron collider as a super charm factory (TAC PF) Construction phase of the proposed GeV scale accelerator facilities will cover next decades. In this presentation, main goals and road map of Turkish Accelerator Center will be explained

Conceptual design of an X-FEL facility using CLIC X-band accelerating structure

Doğan, Mustafa (Dogus Author) -- Conference full title: 5th International Particle Accelerator Conference, IPAC 2014; International Congress Center DresdenDresden; Germany; 15 June 2014 through 20 June 2014.Within last decade a linear accelerating structure with an average loaded gradient of 100 MV/m at 12 GHz has been demonstrated in the CLIC study. Recently, it has been proposed to use the CLIC structure to drive an FEL linac. In contrast to CLIC the linac would be powered by klystrons not by a drive beam. The main advantage of this proposal is achieving the required energies in a very short distance, thus the facility would be rather compact. In this study, we present the conceptual design parameters of a facility which could generate laser photon pulses covering the range of 1-75 Angstrom. Shorter wavelengths could also be reached with slightly increasing the energy