Ozlem Karsli - Academia.edu (original) (raw)

Papers by Ozlem Karsli

Research paper thumbnail of The Status of Turkish Accelerator Complex Project

The Turkish Accelerator Complex (TAC) is proposed as a regional facility for accelerator based fu... more The Turkish Accelerator Complex (TAC) is proposed as a regional facility for accelerator based fundamental and applied research in 1997 with support of Turkish State Planning Organization (DPT). The feasibility and conceptual design phases of TAC proposal were completed in 2001 and 2005, respectively. Again with support of DPT, the technical design phase of TAC was started at the beginning of 2006. The complex will include 1 GeV electron linac and 3.56 GeV positron ring for linac on ring type electron-positron collider as a charm factory and a few GeV proton linac. Besides the particle factory, it is also planned to produce SASE FEL from electron linac and synchrotron radiation from positron ring. It is planned that the TDR of TAC Project will be completed in 2011 and the construction will be performed during following ten years.

Research paper thumbnail of Current status of Turkish accelerator and radiation laboratory in Ankara: the TARLA facility

Canadian Journal of Physics

The Turkish Accelerator and Radiation Laboratory in Ankara, abbreviated as the TARLA facility, is... more The Turkish Accelerator and Radiation Laboratory in Ankara, abbreviated as the TARLA facility, is proposed as the first facility of Turkish Accelerator Center (TAC) project. TARLA is under construction in Golbasi campus of Ankara University by coordination of the Institute of Accelerator Technologies (IAT). TARLA is designed to generate free-electron laser (FEL) pulses in mid- and far-infrared regions as well as Bremsstrahlung radiation up to 30 MeV. TARLA is based on superconducting electron accelerators to be operated between 10 and 40 MeV. The main goal of the TARLA facility is to build up a user facility to open up new opportunities for interdisciplinary scientific research and applications, such as materials science, medicine, nanotechnology, life sciences, etc. In this study, main characteristics and subsystems of the TARLA facility are explained and the current status of installation and test studies are given as well. Finally, user and scientific research potential of the fa...

Research paper thumbnail of Implementation of High Power Microwave Pulse Compressor

IEEE Transactions on Plasma Science

Research paper thumbnail of Parçacık hızlandırıcılarında hızlandırıcı RF dalga üretim, taşınım ve kontrol sistemlerinin tasarımı

Research paper thumbnail of Hızlandırıcılara dayalı kızıl ötesi serbest elektron lazeri (IR-FEL) optimizasyonu

Research paper thumbnail of A design study on high power RF system for the TARLA facility of TAC

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2012

Research paper thumbnail of Beam Diagnostics of E-Gun Test Stand at Tarla

Turkish Accelerator and Radiation Laboratory in Ankara (TARLA) facility, which is essentially pro... more Turkish Accelerator and Radiation Laboratory in Ankara (TARLA) facility, which is essentially proposed to generate ascillator mode FEL in 3-250 microns wavelengths range, will consist of totally normal conducting injector system with 250 keV beam energy, two superconducting RF accelerating modules in order to accelerate the beam 15-40 MeV. Continuous wave (CW) electron beam will provided by TARLA thermionic electron gun (E-GUN). Various aspects of the Thermionic E-GUN test stand to deliver the necessary electron beam in terms of bunch charge, current, energy, emittance and profile fort he beam diagnostic will be discussed. Primarily measurements results of electron beam energy loss and transverse orbit will be shown as well as beam image and shape measurements.

Research paper thumbnail of RF Power Source Systems for Tac Ir Fel (Tarla) Facility

Turkish Accelerator Center (TAC) IR FEL Facility is proposed in 2005. It is planned that 10-40 Me... more Turkish Accelerator Center (TAC) IR FEL Facility is proposed in 2005. It is planned that 10-40 MeV output electron energy will be obtained by two linac sections which consist of two nine-cell superconducting TESLA cavities housed in each cryostat. These electrons will be trapped in a resonator and 2-250 µm wavelength FEL will be obtained. It is calculated that the pulsed electron beam delivered by the injector has a bunch charge of 77 pC and a repetition rate of 13 MHz, an average beam current of 1,6 mA. The repetition frequency turns out to be the 100th fraction of the working frequency of the accelerator of 1.3 GHz. The RF-System provides the energy being transferred to the electron beam by electromagnetic fields in the superconducting cavities. Very low rf dissipation in the superconducting cavities makes it possible to transfer nearly all of the rf power to the beam. The cavities are driven by rf power amplifiers. The rf power is delivered to the cryomodule by wave guides and fe...

Research paper thumbnail of The Status of Turkish Accelerator Complex Project

ABSTRACT The Turkish Accelerator Complex (TAC) is proposed as a regional facility for accelerator... more ABSTRACT The Turkish Accelerator Complex (TAC) is proposed as a regional facility for accelerator based fundamental and applied research in 1997 with support of Turkish State Planning Organization (DPT). The feasibility and conceptual design phases of TAC proposal were completed in 2001 and 2005, respectively. Again with support of DPT, the technical design phase of TAC was started at the beginning of 2006. The complex will include 1 GeV electron linac and 3.56 GeV positron ring for linac on ring type electron-positron collider as a charm factory and a few GeV proton linac. Besides the particle factory, it is also planned to produce SASE FEL from electron linac and synchrotron radiation from positron ring. It is planned that the TDR of TAC Project will be completed in 2011 and the construction will be performed during following ten years.

Research paper thumbnail of The TAC IR FEL Oscillator Facility Project

The TAC (Turkish Accelerator Center) IR FEL Oscillator facility, which has been supported by Turk... more 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 Golbasi 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.

Research paper thumbnail of The Turkish accelerator complex IR FEL project

Infrared Physics & Technology, 2008

Turkish accelerator complex (TAC) project was approved by State Planning Organization (DPT) of Tu... more Turkish accelerator complex (TAC) project was approved by State Planning Organization (DPT) of Turkey in 2006. The complex will contain a linac-ring type electron–positron collider as a particle factory and different accelerator based light sources. As a first step to the national center, the construction of an IR FEL facility is planned until 2011. It is also planned that the

Research paper thumbnail of High power RF operations studies at TARLA facility

Canadian Journal of Physics

Turkish Accelerator and Radiation Laboratory (TARLA) is a facility capable of accelerating an ele... more Turkish Accelerator and Radiation Laboratory (TARLA) is a facility capable of accelerating an electron beam up to 40 MeV. Two beamlines were proposed to generate free-electron laser radiation and bremsstrahlung. The accelerator employs two normal conducting cavities, so-called buncher cavities: subharmonic buncher (SHB) and fundamental buncher (FB), and two cryomodules that house two TESLA cavities each. SHB operates in 260 MHz and FB in 1.3 GHz, and is powered by 1.5 kW and 500 W radio frequency (RF) amplifiers, respectively. Each TESLA cavity is driven by 18 kW saturated high-power solid-state amplifiers (SSA). In addition, a L band pulse compressor system is designed and implemented at the facility to actively promote high-power RF research. Currently, setup of a resonant ring test bench is approved to test the RF components under high power RF conditions. This paper describes the TARLA high power RF, RF controller, and network structures. High power tests and measurements of the...

Research paper thumbnail of The Status of Turkish Accelerator Complex Project

The Turkish Accelerator Complex (TAC) is proposed as a regional facility for accelerator based fu... more The Turkish Accelerator Complex (TAC) is proposed as a regional facility for accelerator based fundamental and applied research in 1997 with support of Turkish State Planning Organization (DPT). The feasibility and conceptual design phases of TAC proposal were completed in 2001 and 2005, respectively. Again with support of DPT, the technical design phase of TAC was started at the beginning of 2006. The complex will include 1 GeV electron linac and 3.56 GeV positron ring for linac on ring type electron-positron collider as a charm factory and a few GeV proton linac. Besides the particle factory, it is also planned to produce SASE FEL from electron linac and synchrotron radiation from positron ring. It is planned that the TDR of TAC Project will be completed in 2011 and the construction will be performed during following ten years.

Research paper thumbnail of Current status of Turkish accelerator and radiation laboratory in Ankara: the TARLA facility

Canadian Journal of Physics

The Turkish Accelerator and Radiation Laboratory in Ankara, abbreviated as the TARLA facility, is... more The Turkish Accelerator and Radiation Laboratory in Ankara, abbreviated as the TARLA facility, is proposed as the first facility of Turkish Accelerator Center (TAC) project. TARLA is under construction in Golbasi campus of Ankara University by coordination of the Institute of Accelerator Technologies (IAT). TARLA is designed to generate free-electron laser (FEL) pulses in mid- and far-infrared regions as well as Bremsstrahlung radiation up to 30 MeV. TARLA is based on superconducting electron accelerators to be operated between 10 and 40 MeV. The main goal of the TARLA facility is to build up a user facility to open up new opportunities for interdisciplinary scientific research and applications, such as materials science, medicine, nanotechnology, life sciences, etc. In this study, main characteristics and subsystems of the TARLA facility are explained and the current status of installation and test studies are given as well. Finally, user and scientific research potential of the fa...

Research paper thumbnail of Implementation of High Power Microwave Pulse Compressor

IEEE Transactions on Plasma Science

Research paper thumbnail of Parçacık hızlandırıcılarında hızlandırıcı RF dalga üretim, taşınım ve kontrol sistemlerinin tasarımı

Research paper thumbnail of Hızlandırıcılara dayalı kızıl ötesi serbest elektron lazeri (IR-FEL) optimizasyonu

Research paper thumbnail of A design study on high power RF system for the TARLA facility of TAC

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2012

Research paper thumbnail of Beam Diagnostics of E-Gun Test Stand at Tarla

Turkish Accelerator and Radiation Laboratory in Ankara (TARLA) facility, which is essentially pro... more Turkish Accelerator and Radiation Laboratory in Ankara (TARLA) facility, which is essentially proposed to generate ascillator mode FEL in 3-250 microns wavelengths range, will consist of totally normal conducting injector system with 250 keV beam energy, two superconducting RF accelerating modules in order to accelerate the beam 15-40 MeV. Continuous wave (CW) electron beam will provided by TARLA thermionic electron gun (E-GUN). Various aspects of the Thermionic E-GUN test stand to deliver the necessary electron beam in terms of bunch charge, current, energy, emittance and profile fort he beam diagnostic will be discussed. Primarily measurements results of electron beam energy loss and transverse orbit will be shown as well as beam image and shape measurements.

Research paper thumbnail of RF Power Source Systems for Tac Ir Fel (Tarla) Facility

Turkish Accelerator Center (TAC) IR FEL Facility is proposed in 2005. It is planned that 10-40 Me... more Turkish Accelerator Center (TAC) IR FEL Facility is proposed in 2005. It is planned that 10-40 MeV output electron energy will be obtained by two linac sections which consist of two nine-cell superconducting TESLA cavities housed in each cryostat. These electrons will be trapped in a resonator and 2-250 µm wavelength FEL will be obtained. It is calculated that the pulsed electron beam delivered by the injector has a bunch charge of 77 pC and a repetition rate of 13 MHz, an average beam current of 1,6 mA. The repetition frequency turns out to be the 100th fraction of the working frequency of the accelerator of 1.3 GHz. The RF-System provides the energy being transferred to the electron beam by electromagnetic fields in the superconducting cavities. Very low rf dissipation in the superconducting cavities makes it possible to transfer nearly all of the rf power to the beam. The cavities are driven by rf power amplifiers. The rf power is delivered to the cryomodule by wave guides and fe...

Research paper thumbnail of The Status of Turkish Accelerator Complex Project

ABSTRACT The Turkish Accelerator Complex (TAC) is proposed as a regional facility for accelerator... more ABSTRACT The Turkish Accelerator Complex (TAC) is proposed as a regional facility for accelerator based fundamental and applied research in 1997 with support of Turkish State Planning Organization (DPT). The feasibility and conceptual design phases of TAC proposal were completed in 2001 and 2005, respectively. Again with support of DPT, the technical design phase of TAC was started at the beginning of 2006. The complex will include 1 GeV electron linac and 3.56 GeV positron ring for linac on ring type electron-positron collider as a charm factory and a few GeV proton linac. Besides the particle factory, it is also planned to produce SASE FEL from electron linac and synchrotron radiation from positron ring. It is planned that the TDR of TAC Project will be completed in 2011 and the construction will be performed during following ten years.

Research paper thumbnail of The TAC IR FEL Oscillator Facility Project

The TAC (Turkish Accelerator Center) IR FEL Oscillator facility, which has been supported by Turk... more 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 Golbasi 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.

Research paper thumbnail of The Turkish accelerator complex IR FEL project

Infrared Physics & Technology, 2008

Turkish accelerator complex (TAC) project was approved by State Planning Organization (DPT) of Tu... more Turkish accelerator complex (TAC) project was approved by State Planning Organization (DPT) of Turkey in 2006. The complex will contain a linac-ring type electron–positron collider as a particle factory and different accelerator based light sources. As a first step to the national center, the construction of an IR FEL facility is planned until 2011. It is also planned that the

Research paper thumbnail of High power RF operations studies at TARLA facility

Canadian Journal of Physics

Turkish Accelerator and Radiation Laboratory (TARLA) is a facility capable of accelerating an ele... more Turkish Accelerator and Radiation Laboratory (TARLA) is a facility capable of accelerating an electron beam up to 40 MeV. Two beamlines were proposed to generate free-electron laser radiation and bremsstrahlung. The accelerator employs two normal conducting cavities, so-called buncher cavities: subharmonic buncher (SHB) and fundamental buncher (FB), and two cryomodules that house two TESLA cavities each. SHB operates in 260 MHz and FB in 1.3 GHz, and is powered by 1.5 kW and 500 W radio frequency (RF) amplifiers, respectively. Each TESLA cavity is driven by 18 kW saturated high-power solid-state amplifiers (SSA). In addition, a L band pulse compressor system is designed and implemented at the facility to actively promote high-power RF research. Currently, setup of a resonant ring test bench is approved to test the RF components under high power RF conditions. This paper describes the TARLA high power RF, RF controller, and network structures. High power tests and measurements of the...