Title :
A method of obtaining parasitic e+ or e- beams during SLAC linear collider operation
Author :
Cavalli-Sforza, M. ; Kelley, L.A. ; Klein, S.R. ; Anthony, P. ; Becker-Szendy, R. ; Erickson, R. ; Gearhart, R.A. ; Keller, L.P. ; Niemi, G. ; Perl, M.L. ; Rochester, L.S. ; Stanek, M. ; Truher, J.B. ; Bosted, P.E. ; White, J.
Author_Institution :
Inst. for Particle Phys., California Univ., Santa Cruz, CA, USA
fDate :
8/1/1994 12:00:00 AM
Abstract :
We have developed a technique that allows SLAC to provide parasitic low-intensity secondary e+ and e- beams up to 25 GeV to End Stations A and B and to the FFTB during SLC operation. This beam was successfully used for a one-month-long experimental run in End Station A by the SLAC E146 collaboration. The experiment used 400 MeV to 25 GeV electron beams at intensities averaging one electron per pulse and 120 pulses per second. The method for producing such a beam without the need for dedicated beam time was to operate parasitically from SLC: photons produced in the SLC beam scrapers in linac sectors 28, 29 and 30 were converted to positrons and electrons in a target downstream from the SLC splitter magnet. The secondary electrons or positrons were then transported to ESA with the A-line
Keywords :
electron accelerators; electron beams; linear accelerators; 400 MeV to 25 GeV; End Station A; End Station B; SLAC E146; SLC; parasitic electron beams; parasitic positron beams; secondary electrons; secondary positrons; Colliding beam accelerators; Colliding beam devices; Electron beams; Linear accelerators; Linear particle accelerator; Magnetic flux; Particle beams; Positrons; Production; Testing;
Journal_Title :
Nuclear Science, IEEE Transactions on
