At Fermilab a procedure using data from TBT BPM system to measure the lattice function of a synchrotron has been developed. The betatron oscillation recorded by the BPM system is fitted to obtain beam parameters x, x', y, y', and ∆p/p. These TBT beam parameters (x, x') or (y, y') are fitted to ellipses to obtain the lattice function β, α, and the emittance associated with the betatron amplitude...

This report reviews procedures and techniques for measuring, correcting and controlling various optics parameters of an accelerator, including the betatron tune, beta function, betatron coupling, dispersion, chromaticity, momentum compaction factor, and beam orbit. The techniques described are not only indispensable for the basic set-up of an accelerator, but in addition the same methods can be...

It is well known, that high-energy electrons can be used for tumor therapy. The so-called conventionel therapy with 100 through 250keV x· rays causes a great part of the x.rays to be scattered and absorbed in the sane tissue. In spite of the medicamental radiation prophylaxis additional radiation diseaes result by those compton scattered rays. By application of fast electrons and hard x.rays (s...

The ion-channel laser (ICL) has been proposed as an alternative to the free-electron laser (FEL), replacing the deflection of electrons by the periodic magnetic field of an undulator with the periodic betatron motion in an ion channel. Ion channels can be generated by passing dense energetic electron bunches or intense laser pulses through plasma. The ICL has potential to replace FELs based on ...

In high energy linear colliders, the low emittance beam from a damping ring has to be preserved all the way to the linac, in the linac and to the interaction point. In particular, the R,hg-‘bLinac (RTL) section of the SLAC Linear Collider (SLC) should provide an exact betatron and dispersion match from the damping ring to the linac. A beam with a non-zero dispersion shows up immediately as an i...

This experiment is a part of the A-region activities by the PINTEX collaboration. Its aim is the investigation of a possible depolarization of the stored polarized proton beam in presence of an internal gas target. The proposed depolarization mechanism is based on a coupling to a nearby depolarizing resonance. Depolarizing resonances occur at discrete beam energies when the precession frequency...