FEL-induced Gene injection

Measuring Fel Radiation Properties at Visa-fel

The VISA (Visible to Infrared SASE Amplifier) SASE free electron laser has been successfully operated at the Accelerator Test Facility (ATF) at BNL. High gain and saturation were observed at 840 nm. We describe here the diagnostic system, experimental procedures and data reduction algorithms, as the FEL performance was measured along the length of the undulator. We also discuss selected spectra...

Subcutaneous injection-induced cellulites

In the hospice ward where patients are in the terminal stages of cancer, it is common practice to give them a subcutaneous injection of pain relievers to reduce their pain and make them more comfortable. Most of these patients are elderly and have low blood pressure or poor veins, which often makes it difficult to inject them because of the calcification at previous injection sites. Thus, subcu...

Frequency Chirped SASE FEL

We present a statistical analysis of the temporal and spectral properties of SASE radiation from an energy-chirped electron beam passing through a long undulator. It is found that the coherence time is independent of the chirp, while the range of spectral coherence is linearly proportional to it. We consider the use of a monochromator to pick out a small temporal slice of the radiation output. ...

Tesla-fel 2002-05

A design of a superconducting 3.9 GHz cavity for the injector of the TTF FEL-User Facility is presented. The cavity will be located after the first TESLA module with eight 1.3 GHz cavities and before the first bunch compressor. The purpose of the cavity is to cancel nonlinear distortions in the longitudinal phase space due to the cosine-like curvature of the 1.3 GHz accelerating cavity voltage....

Relationship of Fel Physics