Alternative Beam Optics for U-Line for lossless Beam Transport to the neutrino-line [report]

Tsoupas N., L. Ahrens, W. Glenn, K. Brown, M.M. Murray
2002 unpublished
The U-transport line 1 [1,2,3,4] (shown as a Blue trace in figure 1) and its extension (the former "neutrino line" shown as red trace on Figure 1 ), are being used to transport the fast extracted [5] proton beam from the AGS synchrotron to various experiments which are located along the "neutrino line". The beam transmission of the transport lines mentioned above, is limited by the vertical aperture of the combined function magnet WD1 whose location is shown in Fig. 1 , The WD1 is the first
more » ... et of the W-line 2 [1,2,3,4] (shown as a Green trace in Figure 1 ) and is turned off during the beam transport to the experiments of the "neutrino-line" but it cannot be removed physically from the transport line since WD1 is part of the AtR transfer line. There are indications, based on the beam profile at the location of the "visual-flag" "UF770" which is downstream of WD1 magnet, that the vertical edges of the beam are "clipped". In order to improve the beam transmission at the location of the WD1 magnet we propose an alternative beam optics which minimizes the vertical beam size at the location of the WD1 magnet and at the same time satisfy the necessary constraints of the beam transport to the experiments of the "neutrino line". In this technical note we describe the current beam optics for transporting the beam down to the Radiography experiment, and the "alternative beam optics" which minimizes the vertical beam size at the location of the WD1 magnet.
doi:10.2172/1061664 fatcat:r6r5dpwptrbwvonri3b3zqqstq