Concept of Virtual accelerator is introduced to develop beam control application programs in the KEKB accelerator control system. A virtual accelerator is a computer process which simulates behavior of a beam in an accelerator and responds to the accelerator control program under development in a same way as an actual accelerator do. Users of the virtual accelerator can test their control algor...

The Colorado State University (CSU) Accelerator Facility will include a 6-MeV L-Band electron linear accelerator (linac) with a free-electron laser (FEL) system capable of producing Terahertz (THz) radiation, a laser laboratory, a microwave test stand, and a magnetic test stand. The photocathode drive linac will be used in conjunction with a hybrid undulator capable of producing THz radiation. ...

The renormalization group method is applied to the study of discrete dynamical systems. As a particular example, the Henon map is considered as applied to describe the transverse betatron oscillations in a cyclic accelerator or storage ring possessing a FODO-cell structure with a single thin sextupole. A powerful renormalization group method is developed that is valid correct to fourth order in...

Mechanical Engineering Center, High Energy Accelerator Research Organization, Tsukuba, JAPAN, [email protected] Mechanical Engineering Center, High Energy Accelerator Research Organization, Tsukuba, JAPAN, tatsuya.kume@ kek.jp Mechanical Engineering Center, High Energy Accelerator Research Organization, Tsukuba, JAPAN, yasuo.higashi@ kek.jp Mechanical Engineering Center, High Energy Accelerator...

background: high-energy linear accelerator (linac) is a valuable tool and the most commonly device for external beam radiation treatments in cancer patients. in the linac head, high-energy photons with energies above the threshold of interaction produce photoneutrons. these photoneutrons deliver the extra dose to the patients in the planning treatment and increase the risk of secondary cancer. ...

The performance of an accelerator depends to a large extent on the quality of the theoretical algorithms and the level of their integration with the control software. Modern accelerator facilities are complex industrial-scale systems that are characterized by tightly bound, diverse scienti c and technical problems. New severe requirements for accelerator parameters result in the strong speciali...

introduction: nowadays new radiochromic films have an essential role in radiotherapy dosimetry. properties such as high sensitivity, good reproducibility, high spatial resolution, easy readout and portability have made them attractive for dosimetry, especially in high-dose-gradient regions. material and methods: in this study, electron-beam dose distributions in homogenous and heterogeneous pha...