scattering

Paper	Title	Other Keywords	Page
WEIOA01	Enhancing Trappable Antiproton Populations Through an Induction Unit Followed by Frictional Cooling	antiproton, rfq, simulation, induction	85
	A. Sessler, G. Penn, J. S. Wurtele, M. S. Zolotorev LBNL, Berkeley, California A. E. Charman UCB, Berkeley, California
	An induction unit, followed by frictional cooling, is applied to the antiproton bunches delivered by CERN's antiproton decelerator (AD) at 5 MeV. The scheme requires about 1 meter of induction unit to reduce a fraction of the 200 ns pulse to 60 keV after which frictional cooling, involving a set of thin foils, reduces the anti-protons to about 5 keV where they can be captured in an anti-proton trap. The scheme is compared to a further de-acceleration ring (such as ELENA) and to a degrading foil from the 5 MeV of the AD alone. Theory and simulations provide a preliminary assessment of the concept's strengths and limitations. The comparisons are limited largely by poorly-known levels of multiple scattering of low-energy antiprotons and experimental experience is employed.
	Slides
TUPS12	Optical Electron Beam Diagnostics for Relativistic Electron Cooling Devices	electron, laser, photon, background	121
	T. Weilbach HIM, Mainz K. Aulenbacher IKP, Mainz J. Dietrich FZJ, Jülich
	For the cooling of proton and Ion beams a well established overlap between cooling beam and circulating beam is needed. The new relativistic electron cooling devices have special demands on the diagnostics which can be used to characterize the cooling beam. Due to high voltage breakdowns they only allow a very small beam loss so non-invasive beam diagnostic methods are necessary. A system based on beam induced uorescence (BIF) was installed at the 100 keV polarized test setup at the Mainzer Mikrotron (MAMI). First results of the measured photon yield as a function of beam current and residual gas pressure will be presented. In addition a Thomson scattering experiment is planned at the same test setup. This method enables the measurement of other observables of the cooling beam like the electron beam energy or the electron temperature. The design of the experiment as well as the challenges will be discussed.