[Show abstract][Hide abstract] ABSTRACT: A 3MeV RFQ for 100MeV proton accelerator has been developed at PEFP (Proton Engineering Frontier Project). The tuning results of the cavity showed that both the frequency and field profile were beyond the tuner limit. To check the cavity characteristics, RF test including proton beam acceleration has been done. To solve the problems in existing RFQ, new RFQ so called RFQ Upgrade has been fabricated. Because the main problem of the existing one is improper tuning of the cavity, the important step for development of RFQ Upgrade is to adjust the vanes before brazing. In this paper, the test results of the existing PEFP RFQ and the pre-brazing tuning are presented.
[Show abstract][Hide abstract] ABSTRACT: The PEFP (Proton Engineering Frontier Project) DTL which accelerate the proton beam having peak current 20 mA to 20 MeV have been constructing in KAERI site . The tank resonant frequency is 350 MHz and a 1 MW klystron is used for 4 tanks. In this paper, the overall features of the PEFP DTL tuning are presented and the measurement results of the DTL tank 1 are discussed.
[Show abstract][Hide abstract] ABSTRACT: The PEFP 20MeV proton accelerator is composed of 3 MeV RFQ and 20MeV DTL and two sets of 1 MW, 350 MHz RF system are required for each accelerating structure. The high power RF system for 3 MeV RFQ was already installed and operated to drive the RFQ. The klystron was tested up to 600 kW itself and operated in pulse routinely. The HPRF system for 20 MeV DTL which consists of 4 tanks was installed, and the RF test for 4 tanks has been carried out. Four RF dummy loads for absorbing RF power reflected from each accelerating structure were designed and manufactured. In this paper, the status and test results of the RF system for 20 MeV proton accelerator are discussed.
[Show abstract][Hide abstract] ABSTRACT: Drift tubes of PEFP 20MeV DTL contain electro-quadrupole magnet composed of commercial enamel wire cooled with water coolant. Those were fabricated through the process of brazing, assembling, electron-beam welding, and post-machining. During the e-beam welding, temperature increase was kept under 50 degree to protect the EQM wire from thermal damage. We performed several tests such as vacuum leak test, hydraulic test, and electrical test. EQM properties such as effective length, magnetic saturation, and offset between magnetic center and geometric center of DT were measured and recorded also.
[Show abstract][Hide abstract] ABSTRACT: A conventional 20 MeV drift tube linac (DTL) for the Proton Engineering Frontier Project (PEFP) has been developed as a low energy section of 100 MeV accelerator. The machine consists of four tanks with 152 cells supplied with 900 kW RF power from 350 NMz klystron through the ridge-loaded waveguide coupler. We assembled the fabricated accelerator components and aligned each part with care. We have also prepared the subsystems for the test of the DTL such as RF power delivery system, high voltage DC power supply, vacuum system, cooling system, measurements and control system and so on. The detailed description of the initial test setup and preliminary test results will be given in this paper.
[Show abstract][Hide abstract] ABSTRACT: We have designed a conventional 20 MeV drift tube linac (DTL) for the Proton Engineering Frontier Project (PEFP) as a low energy section of 100 MeV accelerator. The machine consists of four tanks with 152 cells supplied with 900 kW RF from 350 MHz klystron. We have also studied beam dynamics in this structure and designed focusing quadrupole magnets. The details of the DTL design are reported.
[Show abstract][Hide abstract] ABSTRACT: The development of a low-energy proton accelerator has started as the first phase of the Proton Engineering Frontier Project (PEFP). The low-energy proton accelerator system consists of a 50 keV proton injector, low-energy beam transport (LEBT), 350 MHz, 3 MeV radiofrequency quadrupole (RFQ), 350 MHz, 20 MeV drift-tube linac (DTL), and RF system. The proton injector is under operation, RFQ is testing RF power, and a design of DTL has finished.
[Show abstract][Hide abstract] ABSTRACT: The frontier project for high power proton accelerator including the proton injector, LEBT, RFQ and DTL has been launched in Sep. 2002. The fabrication and installation of the front-end system completed and the engineering design of the DTL has been ended. Now we are fabricating the 1st tank and RF components for the DTL. The purpose of this paper is to overview the installed vacuum systems of the front-end system, and to check out the designation of the DTL vacuum system.
[Show abstract][Hide abstract] ABSTRACT: Several application programs are included in Proton Engineering Frontier Project (PEFP), which was approved by the korean government, Ministry of Science and Technology (MOST) in May 2002. For the feasibility studies of these application programs, we built a beam line at the SNU-AMS tandem accelerator.
No preview · Article · Jan 2003 · IEEE International Conference on Plasma Science
[Show abstract][Hide abstract] ABSTRACT: The PEFP (Proton Engineering Frontier Project) 20 MeV DTL have been constructing in KAERI site. The fabrication of the first tank is finished and the DT installation is in the process. We choose the pool-type electromagnets as the focusing magnet and 50 DTs will be installed on first tank. We tested the winding schemes of copper coils on the iron core and measured the magnetic field saturation. In this paper, the results of the tank fabrication and quadrupole magnet test are presented.
[Show abstract][Hide abstract] ABSTRACT: The fabrication of the 20 MeV DTL tank1 is finished and the preparation for the vacuum test is proceed. A tank is divided into two sections and 50 DTs will be installed on first tank. We plated copper on inner surface of the carbon steel pipe using the PR plating method. All dimensions were compensated during the fabrication for the tank temperature. In this report, we will discuss the fabrication processes and problems.
[Show abstract][Hide abstract] ABSTRACT: A high power RF system for PEFP RFQ has been developed and operated. The required peak power is 535kW, and pulse width, repetition rate for initial operation are 100µs, 10Hz respectively. All of the RF components including RF window, input coupler, klystron power supply and cooling system have the capacity of operating at 535kW average power level. Therefore RF duty can be increased for higher average power operation. The TH2089F klystron was operated in pulse mode by modulating the input RF power. The RF power from the klystron was divided into two legs and delivered to RFQ. In this paper, the system description and operation results are presented.