background: exposure to ionizing radiation is known to induce oxidative stress followed by damage to critical biomolecules like lipids, proteins and dna through radiolysis of cellular water. since radiation has been widely used as an important tool in therapy of cancer, the detailed investigation regarding the dna damage and repair kinetics would help to predict the radiation sensitivity of cel...

Introduction: Because of importance of impact of the Source to Surface Distance (SSD) in determining of monitor unit for electron-therapy, it is essential to know the Virtual Source Position (VSP) for electron beam for a linear therapeutic accelerator for each energy and field size. , especially using the Khan method (photo distance squared method) And compare the results with...

July 2003 Two-dimensional photonic crystal accelerator structures∗ Benjamin M. Cowan† Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309 Abstract Photonic crystals provide a method of confining a synchronous speed-of-light mode in an all-dielectric structure, likely a necessary feature in any optical accelerator. We explore computationally a class of photonic cr...

X-ray free-electron lasers (FELs) are expensive instruments with the accelerator holding the largest portion of the cost of the entire facility. Using a highenergy gain dielectric wakefield accelerator (DWA) instead of the conventional accelerator may reduce the facility size and, significantly, its cost. We show that a collinear dielectric wakefield accelerator can, in principle, accelerate lo...

The KEK electron linac was upgraded to 8 GeV for the KEK B-Factory (KEKB) project. During commissioning of the upgraded linac, even while continuing SOR ring injections, we had achieved a primary electron beam with 10-nC (6:24 10) per bunch up to 3.7-GeV for positron generation. This could be classified as one of the brightest S-band linac’s. Since the KEKB rings were completed in December 1998...

The linac of the SLAC Linear Collider (SLC) must accelerate three high intensity bunches on each linac pulse from 1.2 GeV to 50 GeV with minimal increase of the small transverse emittance [l]. The procedures and adjustments used to obtain this goal are outlined. Some of the accelerator ... -parameters and components which interact are the beam energy, transverse position , component alignment, ...

At the Argonne Chemistry Division efforts are underway to develop a sub-picosecond electron beam pulse radiolysis facility for chemical studies. The target output of the accelerator is to generate electron pulses that can be adjusted from 3nC in .6ps to 100nC in 45ps. In conjunction with development of the accelerator a stateof-the-art ultrafast laser system is under construction that will driv...